Maria L Calvo

Prof. Dr. Maria L Calvo

Optics, Complutense University of Madrid, Madrid, Spain
orcid
Emeritus Professor, Department of Optics, Faculty of Physica...

Research Focus & Metrics

Academic Career Length

52Years (1975-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 March 2007 in Optics Express
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Journal Article
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JRJosé A. Rodrigo
José A. Rodrigo
TATatiana Alieva
Tatiana Alieva
Maria L CalvoMaria L Calvo
Maria L Calvo
Optics InfoBase is the Optical Society's online library for flagship journals, partnered and copublished journals, and recent proceedings from OSA conferences.

25 February 2013 in Optics Letters
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Journal Article
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AVAitor V. Velasco
Aitor V. Velasco
PCPavel Cheben
Pavel Cheben
PBPrzemek J. Bock
Przemek J. Bock
ADAndré Delâge
André Delâge
JSJens H. Schmid
Jens H. Schmid
MVMartin Vachon
Martin Vachon
We report a stationary Fourier-transform spectrometer chip implemented in silicon microphotonic waveguides. The device comprises an array of 32 Mach–Zehnder interferometers (MZIs) with linearly increasing optical path delays between the MZI arms across the array. The optical delays are achieved by using Si-wire waveguides arranged in tightly coiled spirals with a compact device footprint of 12  mm2. Spectral retrieval is demonstrated in a single measurement of the stationary spatial interferogram formed at the output waveguides of the array, with a wavelength resolution of 40 pm within a free spectral range of 0.75 nm. The phase and amplitude errors arising from fabrication imperfections are compensated using a transformation matrix spectral retrieval algorithm.

12 September 2007 in Journal of the Optical Society of America A
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Journal Article
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JRJosé A. Rodrigo
José A. Rodrigo
TATatiana Alieva
Tatiana Alieva
Maria L CalvoMaria L Calvo
Maria L Calvo
The gyrator transform (GT) promises to be a useful tool in image processing, holography, beam characterization, mode transformation, and quantum information. We introduce what we believe to be the first flexible optical experimental setup that performs the GT for a wide range of transformation parameters. The feasibility of the proposed scheme is demonstrated on the gyrator transformation of Hermite–Gaussian modes. For certain parameters the output mode corresponds to the Laguerre–Gaussian one.

1 October 2007 in Optics Communications
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Journal Article
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JRJosé A. Rodrigo
José A. Rodrigo
TATatiana Alieva
Tatiana Alieva
Maria L CalvoMaria L Calvo
Maria L Calvo

20 January 2012 in Optics Letters
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Journal Article
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AVAitor V. Velasco
Aitor V. Velasco
Maria L CalvoMaria L Calvo
Maria L Calvo
PCPavel Cheben
Pavel Cheben
AOAlejandro Ortega-Moñux
Alejandro Ortega-Moñux
JSJens H. Schmid
Jens H. Schmid
DXDan-Xia Xu
Dan-Xia Xu
The design and fabrication of an ultracompact silicon-on-insulator polarization converter is reported. The polarization conversion with an extinction ratio of 16 dB is achieved for a conversion length of only 10 μm. Polarization rotation is achieved by inducing a vertical asymmetry by forming in the waveguide core two subwavelength trenches of different depths. By taking advantage of the calibrated reactive ion etch lag, the two depths are implemented using a single mask and etching process. The measured converter loss is −0.7  dB and the 3 dB bandwidth is 26 nm.

12 March 2001 in Applied Physics Letters
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Journal Article
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PCPavel Cheben
Pavel Cheben
Maria L CalvoMaria L Calvo
Maria L Calvo
Permanent holographic storage has been demonstrated in a photopolymerizable organically modified silica glass. The glass was prepared by dispersing a titanocene photoinitiator and a high refractive index acrylic monomer in a porous silica matrix. This glass exhibits unprecedented sensitivity and refractive index change upon a moderate exposure to green light and can be fabricated in thickness up to several millimeters. A photopolymerizable storage medium of such a thickness with good holographic properties is needed for practical holographic storage devices. Lack of such medium has been considered the main obstacle in development of write-once holographic memories. In our glass, we have stored permanent volume holograms of diffraction efficiency approaching 100% and refractive index modulation up to 4.5×10−3, making this photopolymerizable material suitable for use in holographic data storage.