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Mr. Kaspars Zakis
Riga Technical University

Basic Info


Research Keywords & Expertise

0 Optical Communications
0 Photonics and optical communications
0 Nonlinear fiber optics
0 Fiber optic communications
0 Optical amplification

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Journal article
Published: 01 February 2021 in Fibers
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In this paper we present results from the study of optical signal amplification using Raman assisted fiber optical parametric amplifier with considerable benefits for S-band telecommunication systems where the use of widely used erbium-doped fiber amplifier is limited. We have created detailed models and performed computer simulations of combined Raman and fiber optical parametric amplification in a 16-channel 40 Gbps/channel wavelength division multiplexed transmission system. Achieved gain bandwidth, as well as transmission system parameters—signal-to-noise ratio and bit-error-ratio—were analyzed by comparing the Raman assisted fiber optical parametric amplifier to the single pump fiber optical parametric amplifier. Results show that the 3 dB gain bandwidth in the case of combined amplification is up to 0.2 THz wider with 1.9 dB difference between the lowest and highest gain.

ACS Style

Andis Supe; Kaspars Zakis; Lilita Gegere; Dmitrii Redka; Jurgis Porins; Sandis Spolitis; Vjaceslavs Bobrovs. Raman Assisted Fiber Optical Parametric Amplifier for S-Band Multichannel Transmission System. Fibers 2021, 9, 9 .

AMA Style

Andis Supe, Kaspars Zakis, Lilita Gegere, Dmitrii Redka, Jurgis Porins, Sandis Spolitis, Vjaceslavs Bobrovs. Raman Assisted Fiber Optical Parametric Amplifier for S-Band Multichannel Transmission System. Fibers. 2021; 9 (2):9.

Chicago/Turabian Style

Andis Supe; Kaspars Zakis; Lilita Gegere; Dmitrii Redka; Jurgis Porins; Sandis Spolitis; Vjaceslavs Bobrovs. 2021. "Raman Assisted Fiber Optical Parametric Amplifier for S-Band Multichannel Transmission System." Fibers 9, no. 2: 9.

Conference paper
Published: 20 July 2020 in 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
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This paper provides an overview of most recent and promising techniques on how to improve signal regeneration based on FWM process. This includes the mitigation of undesirable effects dispersion has on FWM or using it to our advantage with channel-specific dispersion compensation. Experimental verification of the feasibility of copier-PSA for long-haul in-line amplification is evaluated. It is also shown that effective use of pump polarisation allows the reduction of noise during regeneration of advanced modulation formats and can facilitate multi-channel operation. Some novel phase quantisation techniques are highlighted which provide higher accuracy than conventional methods.

ACS Style

Kaspars Zakis; Andis Supe. Recent Developments in All-Optical Signal Regeneration Based on Phase-Sensitive Parametric Amplification. 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) 2020, 1 -6.

AMA Style

Kaspars Zakis, Andis Supe. Recent Developments in All-Optical Signal Regeneration Based on Phase-Sensitive Parametric Amplification. 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP). 2020; ():1-6.

Chicago/Turabian Style

Kaspars Zakis; Andis Supe. 2020. "Recent Developments in All-Optical Signal Regeneration Based on Phase-Sensitive Parametric Amplification." 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) , no. : 1-6.

Conference paper
Published: 01 December 2019 in 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)
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In this paper we present computer simulation results of a phase-sensitive fiber optic parametric amplifier (PS-FOPA) in the so-called dual-pump degenerate configuration using highly non-linear fiber (HNLF) with the pump lasers’ frequencies located symmetrically around the signal central frequency with 200 GHz offset. The main purpose of the study was the evaluation of PS-FOPA regeneration performance for differentially encoded binary phase shift keying (DPSK) signals, taking into account pump laser power, signal distortion level, and HNLF chromatic dispersion. A relationship has been established between noisiness of the input signal and optimal power levels providing the lowest output signal bit error ratio. Higher noise levels require higher signal input power to reach the point of gain saturation. Chromatic dispersion coefficient of the HNLF has a substantial impact on the regenerator’s performance. Positive values show a rapid drop-off in performance while negative values can allow greater signal quality improvement at the cost of higher input power.

ACS Style

Kaspars Zakis; Andis Supe. Application of Phase-sensitive Fiber Optic Parametric Amplifier in Phase Modulated Signal Regeneration. 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) 2019, 1175 -1179.

AMA Style

Kaspars Zakis, Andis Supe. Application of Phase-sensitive Fiber Optic Parametric Amplifier in Phase Modulated Signal Regeneration. 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall). 2019; ():1175-1179.

Chicago/Turabian Style

Kaspars Zakis; Andis Supe. 2019. "Application of Phase-sensitive Fiber Optic Parametric Amplifier in Phase Modulated Signal Regeneration." 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) , no. : 1175-1179.