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Proceedings Paper

Optoelectronic feedback in a Sagnac fiber-optic modulator
Author(s): A. Garcia-Weidner; C. Torres Torres; A. V. Khomenko; M. A. Garcia-Zarate
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Paper Abstract

We present a modulation scheme consisting of a fiber optic Sagnac interferometer which has an electro-optic modulator in the loop of the interferometer. Part of the output light intensity is captured by a photodiode, and the resulting electrical signal is amplified by a constant factor (xi) and reintroduced to the electrical modulating signal that is being applied to the Pockels cell. As a consequence, the intensity transfer function of the device can be drastically modified. Without the optoelectronic feedback loop, the device shows the very well known non-linear squared sinusoidal intensity transfer function. By properly choosing the amplifying factor (xi) , a more linear transfer function can be obtained. The theoretical and experimental examination of the device is presented.

Paper Details

Date Published: 14 August 2001
PDF: 4 pages
Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); doi: 10.1117/12.437058
Show Author Affiliations
A. Garcia-Weidner, Ctr. de Investigacion Cientifica y de Educacion Superior de Ensenada (Mexico)
C. Torres Torres, Ctr. de Investigacion Cientifica y de Educacion Superior de Ensenada (Mexico)
A. V. Khomenko, Ctr. de Investigacion Cientifica y de Educacion Superior de Ensenada (Mexico)
M. A. Garcia-Zarate, Ctr. de Investigacion Cientifica y de Educacion Superior de Ensenada (Mexico)


Published in SPIE Proceedings Vol. 4419:
4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications

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