This page has only limited features, please log in for full access.
A hollow-core anti-resonant fiber (HC-ARF) design based on hybrid silica/silicon cladding is proposed for single-polarization, single-mode and high birefringence. We show that by adding silicon layers in a semi-nested HC-ARF, one of the polarization states can be strongly suppressed while simultaneously maintaining low propagation loss for other polarization states, single-mode and high birefiringence. The optimized HC-ARF design exhibits propagation loss, high birefringence, and polarization-extinction ratio of 0.05 dB/m, 0.5 × 10-4, >300 respectively for y-polarization while the loss of x-polarization is >5 dB/m at 1064 nm. The fiber also has low bend-loss and thus can be coiled to a small bend radii of 5 cm having ≈0.06 dB/m bend loss.
Selim Habib; Abubakar Isa Adamu; Christos Markos; Rodrigo Amezcua-Correa. Enhanced birefringence in conventional and hybrid anti-resonant hollow-core fibers. Optics Express 2021, 29, 12516 -12530.
AMA StyleSelim Habib, Abubakar Isa Adamu, Christos Markos, Rodrigo Amezcua-Correa. Enhanced birefringence in conventional and hybrid anti-resonant hollow-core fibers. Optics Express. 2021; 29 (8):12516-12530.
Chicago/Turabian StyleSelim Habib; Abubakar Isa Adamu; Christos Markos; Rodrigo Amezcua-Correa. 2021. "Enhanced birefringence in conventional and hybrid anti-resonant hollow-core fibers." Optics Express 29, no. 8: 12516-12530.
Stimulated Raman scattering (SRS) enabled by the emerging gas-filled low-loss anti-resonant hollow-core fiber (ARHCF) technology opens up a competitive way towards the development of novel lasers in the molecular fingerprint region. In this article, the characteristics of noise and long-term stability of near- and mid-infrared (near-IR and mid-IR) gas-filled fiber Raman lasers have been investigated for the first time. The results reveal that an increase in Raman pulse energy is associated with a decrease in noise, and that the relative pulse peak intensity noise (RIN) is always lower than the relative pulse energy noise (REN). We also demonstrate that long-term drift of the pulse energy and peak power are directly linked with the high amount of heat release during the Raman Stokes generation. The demonstrated noise and long-term stability performance provide necessary references for potential spectroscopic applications as well as further improvements of the emerging infrared gas-filled ARHCF Raman laser technology.
Yazhou Wang; Abubakar Isa Adamu; Manoj Kumar Dasa; Jose Enrique Antonio-Lopez; Selim Habib; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. Noise Performance and Long-Term Stability of Near- and Mid-IR Gas-Filled Fiber Raman Lasers. Journal of Lightwave Technology 2021, 39, 3560 -3567.
AMA StyleYazhou Wang, Abubakar Isa Adamu, Manoj Kumar Dasa, Jose Enrique Antonio-Lopez, Selim Habib, Rodrigo Amezcua-Correa, Ole Bang, Christos Markos. Noise Performance and Long-Term Stability of Near- and Mid-IR Gas-Filled Fiber Raman Lasers. Journal of Lightwave Technology. 2021; 39 (11):3560-3567.
Chicago/Turabian StyleYazhou Wang; Abubakar Isa Adamu; Manoj Kumar Dasa; Jose Enrique Antonio-Lopez; Selim Habib; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. 2021. "Noise Performance and Long-Term Stability of Near- and Mid-IR Gas-Filled Fiber Raman Lasers." Journal of Lightwave Technology 39, no. 11: 3560-3567.
Understanding the impact of the cladding tube structure on the overall guiding performance is crucial for designing a single-mode, wide-band, and ultra low-loss nested hollow-core anti-resonant fiber (HC-ARF). Here we thoroughly investigate on how the propagation loss is affected by the nested elements when their geometry is realistic (i.e., non-ideal). Interestingly, it was found that the size, rather than the shape, of the nested elements has a dominant role in the final loss performance of the regular nested HC-ARFs. We identify a unique ‘V-shape’ pattern for suppression of higher-order modes loss by optimizing free design parameters of the HC-ARF. We find that a 5-tube nested HC-ARF has wider transmission window and better single-mode operation than a 6-tube HC-ARF. We show that the propagation loss can be significantly improved by using anisotropic nested anti-resonant tubes elongated in the radial direction. Our simulations indicate that with this novel fiber design, a propagation loss as low as 0.11 dB/km at 1.55 μm can be achieved. Our results provide design insight toward fully exploiting a single-mode, wide-band, and ultra low-loss HC-ARF. In addition, the extraordinary optical properties of the proposed fiber can be beneficial for several applications such as future optical communication system, high energy light transport, extreme non-nonlinear optics and beyond.
Selim Habib; Christos Markos; Rodrigo Amezcua-Correa. Impact of cladding elements on the loss performance of hollow-core anti-resonant fibers. Optics Express 2021, 29, 3359 -3374.
AMA StyleSelim Habib, Christos Markos, Rodrigo Amezcua-Correa. Impact of cladding elements on the loss performance of hollow-core anti-resonant fibers. Optics Express. 2021; 29 (3):3359-3374.
Chicago/Turabian StyleSelim Habib; Christos Markos; Rodrigo Amezcua-Correa. 2021. "Impact of cladding elements on the loss performance of hollow-core anti-resonant fibers." Optics Express 29, no. 3: 3359-3374.
In this work, we present a high-pulse-energy multi-wavelength Raman laser spanning from 1.53 µm up to 2.4 µm by employing the cascaded rotational stimulated Raman scattering effect in a 5 m hydrogen (H2)-filled nested anti-resonant fiber, pumped by a linearly polarized Er/Yb fiber laser with a peak power of ∼13kW and pulse duration of ∼7ns in the C-band. The developed Raman laser has distinct lines at 1683 nm, 1868 nm, 2100 nm, and 2400 nm, with pulse energies as high as 18.25 µJ, 14.4 µJ, 14.1 µJ, and 8.2 µJ, respectively. We demonstrate how the energy in the Raman lines can be controlled by tuning the H2 pressure from 1 bar to 20 bar.
Abubakar Isa Adamu; Yazhou Wang; Selim Habib; Manoj Kumar Dasa; J. E. Antonio-Lopez; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. Multi-wavelength high-energy gas-filled fiber Raman laser spanning from 153 µm to 24 µm. Optics Letters 2021, 46, 452 -455.
AMA StyleAbubakar Isa Adamu, Yazhou Wang, Selim Habib, Manoj Kumar Dasa, J. E. Antonio-Lopez, Rodrigo Amezcua-Correa, Ole Bang, Christos Markos. Multi-wavelength high-energy gas-filled fiber Raman laser spanning from 153 µm to 24 µm. Optics Letters. 2021; 46 (3):452-455.
Chicago/Turabian StyleAbubakar Isa Adamu; Yazhou Wang; Selim Habib; Manoj Kumar Dasa; J. E. Antonio-Lopez; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. 2021. "Multi-wavelength high-energy gas-filled fiber Raman laser spanning from 153 µm to 24 µm." Optics Letters 46, no. 3: 452-455.
A hollow core antiresonant photonic crystal fiber (HC-ARPCF) is analyzed for terahertz applications. A numerical analysis of the proposed fiber is first carried out to minimize coupling between the core and cladding modes. The modeling of the scaled-up and inhibited coupling fiber is carried out by means of a Finite Element Method (FEM), which is then demonstrated using a Zeonex filament fiber, fabricated by fused deposition modeling (FDM) of 3D printing technology. The simulation is carried out to analyze both the transmission and possibility of refractometric sensing, whereas, the experimental analysis is carried out using terahertz time domain spectroscopy (THz-TDS), and supports our numerical findings, illustrating how the proposed fibers can be used for low loss transmission of terahertz waves. The simplicity of the proposed fiber structures facilitates fabrication for a number of different transmission and sensing applications in the terahertz range.
Jakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Selim Habib; Alex Dinovitser; Mayank Kaushik; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Derek Abbott. Hollow Core Inhibited Coupled Antiresonant Terahertz Fiber: A Numerical and Experimental Study. IEEE Transactions on Terahertz Science and Technology 2020, 11, 245 -260.
AMA StyleJakeya Sultana, Saiful Islam, Cristiano M. B. Cordeiro, Selim Habib, Alex Dinovitser, Mayank Kaushik, Brian Wai-Him Ng, Heike Ebendorff-Heidepriem, Derek Abbott. Hollow Core Inhibited Coupled Antiresonant Terahertz Fiber: A Numerical and Experimental Study. IEEE Transactions on Terahertz Science and Technology. 2020; 11 (3):245-260.
Chicago/Turabian StyleJakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Selim Habib; Alex Dinovitser; Mayank Kaushik; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Derek Abbott. 2020. "Hollow Core Inhibited Coupled Antiresonant Terahertz Fiber: A Numerical and Experimental Study." IEEE Transactions on Terahertz Science and Technology 11, no. 3: 245-260.
Mosst Tasnim Binte Shawkat; Samiul Habib; S. M. Abdur Razzak. Broadband subdiffraction imaging in highly anisotropic metamaterials using ultra-short super-Gaussian pulse. OSA Continuum 2020, 3, 1504 .
AMA StyleMosst Tasnim Binte Shawkat, Samiul Habib, S. M. Abdur Razzak. Broadband subdiffraction imaging in highly anisotropic metamaterials using ultra-short super-Gaussian pulse. OSA Continuum. 2020; 3 (6):1504.
Chicago/Turabian StyleMosst Tasnim Binte Shawkat; Samiul Habib; S. M. Abdur Razzak. 2020. "Broadband subdiffraction imaging in highly anisotropic metamaterials using ultra-short super-Gaussian pulse." OSA Continuum 3, no. 6: 1504.
In this paper, we present and compare two experimentally feasible photonic crystal fiber (PCF) designs (Type — I and Type — II) which ensure near-zero flattened dispersion with ultrahigh phase and group birefringence at THz frequencies. Both structures are based on a subset of a triangular array of circular air-holes, which define the cladding of the PCF and a central elliptical air-hole which breaks the symmetry of the structure, thus introducing high levels of birefringence. Additionally, we investigate the possibility of further enhancing the birefringence properties of Type — II structure by selectively filling the air-holes with Potassium Chloride (KCl) as strong Epsilon-Near-Zero (ENZ) material. Our investigation reveals that significant enhancement of birefringence can be achieved than its original counterpart with birefringence to be as high as 0.0627 at 6.2 THz and near-zero flat dispersion of −0.54 ± 0.04 ps/THz/cm over the frequency range of 6.2—6.3 THz.
Shahjalal Hossain; S. M. Abdur Razzak; Christos Markos; Nguyen Hoang Hai; Selim Habib; Samiul Habib. Highly Birefringent, Low-Loss, and Near-Zero Flat Dispersion ENZ Based THz Photonic Crystal Fibers. IEEE Photonics Journal 2020, 12, 1 -9.
AMA StyleShahjalal Hossain, S. M. Abdur Razzak, Christos Markos, Nguyen Hoang Hai, Selim Habib, Samiul Habib. Highly Birefringent, Low-Loss, and Near-Zero Flat Dispersion ENZ Based THz Photonic Crystal Fibers. IEEE Photonics Journal. 2020; 12 (3):1-9.
Chicago/Turabian StyleShahjalal Hossain; S. M. Abdur Razzak; Christos Markos; Nguyen Hoang Hai; Selim Habib; Samiul Habib. 2020. "Highly Birefringent, Low-Loss, and Near-Zero Flat Dispersion ENZ Based THz Photonic Crystal Fibers." IEEE Photonics Journal 12, no. 3: 1-9.
Aslam Mollah; Samiul Habib; Selim Habib. Novel hollow-core asymmetric conjoined-tube anti-resonant fiber for low-loss THz wave guidance. OSA Continuum 2020, 3, 1169 .
AMA StyleAslam Mollah, Samiul Habib, Selim Habib. Novel hollow-core asymmetric conjoined-tube anti-resonant fiber for low-loss THz wave guidance. OSA Continuum. 2020; 3 (5):1169.
Chicago/Turabian StyleAslam Mollah; Samiul Habib; Selim Habib. 2020. "Novel hollow-core asymmetric conjoined-tube anti-resonant fiber for low-loss THz wave guidance." OSA Continuum 3, no. 5: 1169.
Mode-selective fiber lasers have advantages in a number of applications. Here we propose and experimentally demonstrate a transverse mode-selective few-mode Brillouin fiber laser using the mode-selective photonic lantern. We generated the lowest three orders of linearly polarized (LP) modes based on both intramodal and intermodal stimulated Brillouin scattering (SBS). Their slope efficiencies, optical spectra, mode profiles, and linewidths were measured.
Ning Wang; J. C. Alvarado-Zacarias; Selim Habib; He Wen; J. E. Antonio-Lopez; Pierre Sillard; A. Amezcua-Correa; Axel Schülzgen; Guifang Li. Mode-selective few-mode Brillouin fiber lasers based on intramodal and intermodal SBS. Optics Letters 2020, 45, 2323 -2326.
AMA StyleNing Wang, J. C. Alvarado-Zacarias, Selim Habib, He Wen, J. E. Antonio-Lopez, Pierre Sillard, A. Amezcua-Correa, Axel Schülzgen, Guifang Li. Mode-selective few-mode Brillouin fiber lasers based on intramodal and intermodal SBS. Optics Letters. 2020; 45 (8):2323-2326.
Chicago/Turabian StyleNing Wang; J. C. Alvarado-Zacarias; Selim Habib; He Wen; J. E. Antonio-Lopez; Pierre Sillard; A. Amezcua-Correa; Axel Schülzgen; Guifang Li. 2020. "Mode-selective few-mode Brillouin fiber lasers based on intramodal and intermodal SBS." Optics Letters 45, no. 8: 2323-2326.
In this Letter, we demonstrate a high pulse energy and linearly polarized mid-infrared Raman fiber laser targeting the strongest absorption line of ${\rm CO}_2$CO2 at $\sim{4.2}\;\unicode {x00B5} {\rm m}$∼4.2µm. This laser was generated from a hydrogen (${\rm H}_2$H2)-filled antiresonant hollow-core fiber, pumped by a custom-made 1532.8 nm Er-doped fiber laser delivering 6.9 ns pulses and 11.6 kW peak power. A quantum efficiency as high as 74% was achieved, to yield 17.6 µJ pulse energy at 4.22 µm. Less than 20 bar ${\rm H}_2$H2 pressure was required to maximize the pulse energy since the transient Raman regime was efficiently suppressed by the long pump pulses.
Yazhou Wang; Manoj Kumar Dasa; Abubakar Isa Adamu; J. E. Antonio-Lopez; Selim Habib; Rodrigo Amezcua Correa; Ole Bang; Christos Markos. High pulse energy and quantum efficiency mid-infrared gas Raman fiber laser targeting CO2 absorption at 4.2 µm. Optics Letters 2020, 45, 1938 -1941.
AMA StyleYazhou Wang, Manoj Kumar Dasa, Abubakar Isa Adamu, J. E. Antonio-Lopez, Selim Habib, Rodrigo Amezcua Correa, Ole Bang, Christos Markos. High pulse energy and quantum efficiency mid-infrared gas Raman fiber laser targeting CO2 absorption at 4.2 µm. Optics Letters. 2020; 45 (7):1938-1941.
Chicago/Turabian StyleYazhou Wang; Manoj Kumar Dasa; Abubakar Isa Adamu; J. E. Antonio-Lopez; Selim Habib; Rodrigo Amezcua Correa; Ole Bang; Christos Markos. 2020. "High pulse energy and quantum efficiency mid-infrared gas Raman fiber laser targeting CO2 absorption at 4.2 µm." Optics Letters 45, no. 7: 1938-1941.
Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core fibers constitute perhaps the most viable solution towards ultrafast, compact, and tunable lasers in the UV spectral region, which can even also extend into the mid-infrared (IR). Noise and spectral stability of such broadband sources are key parameters that define their true potential and suitability towards real-world applications. In order to investigate the spectral stability and noise levels in these fiber-based DUV sources, we generate an SC spectrum that extends from 180 nm (through phase-matched dispersive waves - DWs) to 4 μm by pumping an argon-filled hollow-core anti-resonant fiber at a mid-IR wavelength of 2.45 μm. We characterize the long-term stability of the source over several days and the pulse-to-pulse relative intensity noise (RIN) of the DW at 275 nm. The results indicate no sign of spectral degradation over 110 hours, but the RIN of the DW pulses at 275 nm is found to be as high as 33.3%. Numerical simulations were carried out to investigate the spectral distribution of the RIN and the results confirm the experimental measurements and that the poor noise performance is due to the high RIN of the mid-IR pump laser, which was hitherto not considered in numerical modelling of these sources. The results presented herein provide an important step towards an understanding of the noise mechanism underlying such complex light-gas nonlinear interactions and demonstrate the need for pump laser stabilization.
Abubakar I. Adamu; Selim Habib; Callum R. Smith; J. Enrique Antonio Lopez; Peter Uhd Jepsen; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources driven by ultrafast mid-IR pulses. Scientific Reports 2020, 10, 1 -10.
AMA StyleAbubakar I. Adamu, Selim Habib, Callum R. Smith, J. Enrique Antonio Lopez, Peter Uhd Jepsen, Rodrigo Amezcua-Correa, Ole Bang, Christos Markos. Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources driven by ultrafast mid-IR pulses. Scientific Reports. 2020; 10 (1):1-10.
Chicago/Turabian StyleAbubakar I. Adamu; Selim Habib; Callum R. Smith; J. Enrique Antonio Lopez; Peter Uhd Jepsen; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. 2020. "Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources driven by ultrafast mid-IR pulses." Scientific Reports 10, no. 1: 1-10.
Most surface plasmon resonance (SPR) based photonic crystal fiber (PCF) sensors have been designed to detect the analyte refractive index (RI) ranging from 1.33 to 1.41. In this paper, we propose a new approach to extend the detection range of the sensor, and it can be fabricated with the existing fabrication techniques. Contrary to the existing PCF based sensors, our designed sensor is based on an air-core PCF where analyte is placed to the core of the PCF through a vertical side opening channel and is able to detect RI of the analyte higher than that of the PCF background. We use a chemically stable plasmonic material (i.e., gold), where the plasmonic material and analyte are placed in such a way that there is no direct contact between them, thus reducing the interference effect. According to our simulation, we show that the spectral sensitivity and resolution are achieved as 11,700 nm/RIU and 8.55×10−6 RIU, respectively, for the analyte RI of 1.42. We believe that our proposed sensor can be used to detect highly active chemical and biological liquid samples.
Alok Kumar Paul; Samiul Habib; Nguyen Hoang Hai; S.M. Abdur Razzak. An air-core photonic crystal fiber based plasmonic sensor for high refractive index sensing. Optics Communications 2020, 464, 125556 .
AMA StyleAlok Kumar Paul, Samiul Habib, Nguyen Hoang Hai, S.M. Abdur Razzak. An air-core photonic crystal fiber based plasmonic sensor for high refractive index sensing. Optics Communications. 2020; 464 ():125556.
Chicago/Turabian StyleAlok Kumar Paul; Samiul Habib; Nguyen Hoang Hai; S.M. Abdur Razzak. 2020. "An air-core photonic crystal fiber based plasmonic sensor for high refractive index sensing." Optics Communications 464, no. : 125556.
Stefan Gausmann; Jose Enrique Antonio-Lopez; James Anderson; Steffen Wittek; Sanjabi Eznaveh Eznaveh; Hee-Jun Jang; Selim Habib; Justin Cook; Martin C. Richardson; Rodrigo Amezcua Correa; Axel Schulzgen. S2 Measurements Showing Suppression of Higher Order Modes in Confined Rare Earth Doped Large Core Fibers. Journal of Lightwave Technology 2020, 38, 1953 -1958.
AMA StyleStefan Gausmann, Jose Enrique Antonio-Lopez, James Anderson, Steffen Wittek, Sanjabi Eznaveh Eznaveh, Hee-Jun Jang, Selim Habib, Justin Cook, Martin C. Richardson, Rodrigo Amezcua Correa, Axel Schulzgen. S2 Measurements Showing Suppression of Higher Order Modes in Confined Rare Earth Doped Large Core Fibers. Journal of Lightwave Technology. 2020; 38 (7):1953-1958.
Chicago/Turabian StyleStefan Gausmann; Jose Enrique Antonio-Lopez; James Anderson; Steffen Wittek; Sanjabi Eznaveh Eznaveh; Hee-Jun Jang; Selim Habib; Justin Cook; Martin C. Richardson; Rodrigo Amezcua Correa; Axel Schulzgen. 2020. "S2 Measurements Showing Suppression of Higher Order Modes in Confined Rare Earth Doped Large Core Fibers." Journal of Lightwave Technology 38, no. 7: 1953-1958.
Few-mode EDFAs with low channel crosstalk can replace multiple parallel single-mode EDFAs in single-mode fiber trunk lines and networks. Here we proposed a low-crosstalk few-mode EDFA by exploiting the unitary property of the coupling matrix of a symmetric photonic lantern. We experimentally demonstrated a 3-channel few-mode EDFA using retro-reflection of a 3-mode symmetric photonic lantern. The small signal gain for all three channels are measured to be larger than 25 dB over the entire C-band and the crosstalks are below −10 dB.
Ning Wang; Inwoong Kim; Olga Vassilieva; Tadashi Ikeuchi; He Wen; J. E. Antonio-Lopez; J. C. Alvarado-Zacarias; Huiyuan Liu; Shengli Fan; Selim Habib; Rodrigo Amezcua-Correa; Guifang Li. Low-crosstalk few-mode EDFAs using retro-reflection for single-mode fiber trunk lines and networks. Optics Express 2019, 27, 35962 -35970.
AMA StyleNing Wang, Inwoong Kim, Olga Vassilieva, Tadashi Ikeuchi, He Wen, J. E. Antonio-Lopez, J. C. Alvarado-Zacarias, Huiyuan Liu, Shengli Fan, Selim Habib, Rodrigo Amezcua-Correa, Guifang Li. Low-crosstalk few-mode EDFAs using retro-reflection for single-mode fiber trunk lines and networks. Optics Express. 2019; 27 (24):35962-35970.
Chicago/Turabian StyleNing Wang; Inwoong Kim; Olga Vassilieva; Tadashi Ikeuchi; He Wen; J. E. Antonio-Lopez; J. C. Alvarado-Zacarias; Huiyuan Liu; Shengli Fan; Selim Habib; Rodrigo Amezcua-Correa; Guifang Li. 2019. "Low-crosstalk few-mode EDFAs using retro-reflection for single-mode fiber trunk lines and networks." Optics Express 27, no. 24: 35962-35970.
This work reports on the fabrication and subsequent supercontinuum generation in a Ge-As-Se-Te/Ge-As-Se core/clad chalcogenide step-index fiber with an elliptical-core and an ultra-high numerical aperture of 1.88 ± 0.02 from 2.5 - 15 µm wavelength. The fiber has very low transmission loss of < 2 dB/m from 5-11 µm and a minimum loss of 0.72 ± 0.04 dB/m at 8.56 µm. Supercontinuum spanning from 2.1 µm to 11.5 µm with an average power of ∼6.5 mW was achieved by pumping a ∼16 cm fiber with a minor/major axis core diameter of 4.2/5.2 µm with 250 fs pulses at 4.65 µm wavelength and a repetition rate of 20.88 MHz. The effect of the elliptical-core was investigated by means of mechanical rotation of the fiber relative to the linear pump polarization, and it was found to cause a shift in the supercontinuum spectral edges by several hundred nanometers.
D. Jayasuriya; C. R. Petersen; D. Furniss; C. Markos; Z. Tang; S. Habib; Ole Bang; T. M Benson; A. B Seddon. Mid-IR supercontinuum generation in birefringent, low loss, ultra-high numerical aperture Ge-As-Se-Te chalcogenide step-index fiber. Optical Materials Express 2019, 9, 2617 -2629.
AMA StyleD. Jayasuriya, C. R. Petersen, D. Furniss, C. Markos, Z. Tang, S. Habib, Ole Bang, T. M Benson, A. B Seddon. Mid-IR supercontinuum generation in birefringent, low loss, ultra-high numerical aperture Ge-As-Se-Te chalcogenide step-index fiber. Optical Materials Express. 2019; 9 (6):2617-2629.
Chicago/Turabian StyleD. Jayasuriya; C. R. Petersen; D. Furniss; C. Markos; Z. Tang; S. Habib; Ole Bang; T. M Benson; A. B Seddon. 2019. "Mid-IR supercontinuum generation in birefringent, low loss, ultra-high numerical aperture Ge-As-Se-Te chalcogenide step-index fiber." Optical Materials Express 9, no. 6: 2617-2629.
In this paper, we demonstrate how the solitonplasma interaction initiates trapping of the generated dispersive waves (DWs) in an experimentally feasible tapered He-filled hollow-core anti-resonant fiber (HC-ARF). We show that the taper gradient strongly influences the pulse trapping dynamics and thus determines the intensity and blue-shift of the trapped DW. This process leads to an efficient DW generation down to 100 nm with a 3.4-octave supercontinuum spanning 100-1150 nm (2.73 PHz) by tapering a 36 μm core HC-ARF to 18 μm under 19 bar He, pumped at 800 nm with 6 μJ pulse energy. The proposed fiber taper structure could be an alternative route to generate light in the extreme ultra-violet (EUV) spectral range using moderate gas pressure and relatively low pulse energy.
Selim Habib; Christos Markos; J. E. Antonio-Lopez; Rodrigo Amezcua-Correa. Extreme UV Light Generation Through Dispersive Wave Trapping in a Tapered Gas-Filled Hollow Fiber. IEEE Photonics Technology Letters 2019, 31, 795 -798.
AMA StyleSelim Habib, Christos Markos, J. E. Antonio-Lopez, Rodrigo Amezcua-Correa. Extreme UV Light Generation Through Dispersive Wave Trapping in a Tapered Gas-Filled Hollow Fiber. IEEE Photonics Technology Letters. 2019; 31 (10):795-798.
Chicago/Turabian StyleSelim Habib; Christos Markos; J. E. Antonio-Lopez; Rodrigo Amezcua-Correa. 2019. "Extreme UV Light Generation Through Dispersive Wave Trapping in a Tapered Gas-Filled Hollow Fiber." IEEE Photonics Technology Letters 31, no. 10: 795-798.
Supercontinuum (SC) generation based on ultrashort pulse compression constitutes one of the most promising technologies towards ultra-wide bandwidth, high-brightness, and spatially coherent light sources for applications such as spectroscopy and microscopy. Here, multi-octave SC generation in a gas-filled hollow-core antiresonant fiber (HC-ARF) is reported spanning from 200 nm in the deep ultraviolet (DUV) to 4000 nm in the mid-infrared (mid-IR) having an output energy of 5 μJ. This was obtained by pumping at the center wavelength of the first anti-resonant transmission window (2460 nm) with ~100 fs pulses and an injected pulse energy of ~8 μJ. The mechanism behind the extreme spectral broadening relies upon intense soliton-plasma nonlinear dynamics which leads to efficient soliton self-compression and phase-matched dispersive wave (DW) emission in the DUV region. The strongest DW is observed at 275 nm which corresponds to the calculated phase-matching wavelength of the pump. Furthermore, the effect of changing the pump pulse energy and gas pressure on the nonlinear dynamics and their direct impact on SC generation was investigated. This work represents another step towards gas-filled fiber-based coherent sources, which is set to have a major impact on applications spanning from DUV to mid-IR.
Abubakar I. Adamu; Selim Habib; Christian R. Petersen; J. Enrique Antonio Lopez; Binbin Zhou; Axel Schülzgen; Morten Bache; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. Deep-UV to Mid-IR Supercontinuum Generation driven by Mid-IR Ultrashort Pulses in a Gas-filled Hollow-core Fiber. Scientific Reports 2019, 9, 1 -9.
AMA StyleAbubakar I. Adamu, Selim Habib, Christian R. Petersen, J. Enrique Antonio Lopez, Binbin Zhou, Axel Schülzgen, Morten Bache, Rodrigo Amezcua-Correa, Ole Bang, Christos Markos. Deep-UV to Mid-IR Supercontinuum Generation driven by Mid-IR Ultrashort Pulses in a Gas-filled Hollow-core Fiber. Scientific Reports. 2019; 9 (1):1-9.
Chicago/Turabian StyleAbubakar I. Adamu; Selim Habib; Christian R. Petersen; J. Enrique Antonio Lopez; Binbin Zhou; Axel Schülzgen; Morten Bache; Rodrigo Amezcua-Correa; Ole Bang; Christos Markos. 2019. "Deep-UV to Mid-IR Supercontinuum Generation driven by Mid-IR Ultrashort Pulses in a Gas-filled Hollow-core Fiber." Scientific Reports 9, no. 1: 1-9.
Broadband supercontinuum generation is numerically investigated in a Xe-filled nested hollow-core antiresonant (HC-AR) fiber pumped at 3 μm with pulses of 100 fs duration and 15 μJ energy. For a 25 cm long fiber, under 7 bar pressure, the supercontinuum spectrum spans multiple octaves from 400 nm to 5000 nm. Furthermore, the influence of bending on ultrafast nonlinear pulse propagation dynamics is investigated for two types of HC-AR fibers (nested and non-nested capillaries). Our results predict similar nonlinear dynamics for both fiber types and a significant reduction of the spectral broadening under tight bending conditions.
Selim Habib; Christos Markos; J. E. Antonio-Lopez; Rodrigo Amezcua-Correa. Multioctave supercontinuum from visible to mid-infrared and bend effects on ultrafast nonlinear dynamics in gas-filled hollow-core fiber. Applied Optics 2019, 58, D7 -D11.
AMA StyleSelim Habib, Christos Markos, J. E. Antonio-Lopez, Rodrigo Amezcua-Correa. Multioctave supercontinuum from visible to mid-infrared and bend effects on ultrafast nonlinear dynamics in gas-filled hollow-core fiber. Applied Optics. 2019; 58 (13):D7-D11.
Chicago/Turabian StyleSelim Habib; Christos Markos; J. E. Antonio-Lopez; Rodrigo Amezcua-Correa. 2019. "Multioctave supercontinuum from visible to mid-infrared and bend effects on ultrafast nonlinear dynamics in gas-filled hollow-core fiber." Applied Optics 58, no. 13: D7-D11.
As technology continues to advance, the development of novel sensing systems opens new possibilities for low-cost, practical biosensing applications. In this Letter, we demonstrate a localized surface plasmon resonance system that combines both wave-guiding and plasmonic resonance sensing with a single microstructured polymeric structure. Characterizing the sensor using the finite element method simulation shows, to the best of our knowledge, a record wavelength sensitivity (WS) of 111000 nm/refractive index unit (RIU), high amplitude sensitivity (AS) of 2050 RIU−1, high sensor resolution and limit of detection of 9×10−7 RIU and 8.12×10−12 RIU2/nm, respectively. Furthermore, these sensors have the capability to detect an analyte within the refractive index range of 1.33–1.43 in the visible to mid-IR, therefore being potentially suitable for applications in biomolecular and chemical analyte detection.
Saiful Islam; Jakeya Sultana; Rifat Ahmmed Aoni; Selim Habib; Alex Dinovitser; Brian Ng; Derek Abbott. Localized surface plasmon resonance biosensor: an improved technique for SERS response intensification. Optics Letters 2019, 44, 1134 -1137.
AMA StyleSaiful Islam, Jakeya Sultana, Rifat Ahmmed Aoni, Selim Habib, Alex Dinovitser, Brian Ng, Derek Abbott. Localized surface plasmon resonance biosensor: an improved technique for SERS response intensification. Optics Letters. 2019; 44 (5):1134-1137.
Chicago/Turabian StyleSaiful Islam; Jakeya Sultana; Rifat Ahmmed Aoni; Selim Habib; Alex Dinovitser; Brian Ng; Derek Abbott. 2019. "Localized surface plasmon resonance biosensor: an improved technique for SERS response intensification." Optics Letters 44, no. 5: 1134-1137.
We show that adiabatic down-conversion can be made the dominant four-wave mixing process in an anti-resonant hollow-core fiber for nearly a full octave of mid-infrared bandwidth with energy exceeding 10 μJ, allowing the generation of energetic and shapeable two-cycle pulses. A numerical study of a tapered fiber with an applied gas pressure gradient predicts the efficient conversion of a 770–860 nm near-infrared frequency band to 3–5 μm, while a linear transfer function allows pre-conversion pulse shaping and simple dispersion management. Our proposed system may prove to be useful in diverse research topics employing nonlinear spectroscopy or strong light–matter interactions.
Xiaoyue Ding; Selim Habib; Rodrigo Amezcua-Correa; Jeffrey Moses. Near-octave intense mid-infrared by adiabatic down-conversion in hollow anti-resonant fiber. Optics Letters 2019, 44, 1084 -1087.
AMA StyleXiaoyue Ding, Selim Habib, Rodrigo Amezcua-Correa, Jeffrey Moses. Near-octave intense mid-infrared by adiabatic down-conversion in hollow anti-resonant fiber. Optics Letters. 2019; 44 (5):1084-1087.
Chicago/Turabian StyleXiaoyue Ding; Selim Habib; Rodrigo Amezcua-Correa; Jeffrey Moses. 2019. "Near-octave intense mid-infrared by adiabatic down-conversion in hollow anti-resonant fiber." Optics Letters 44, no. 5: 1084-1087.