Optoelectronic feedback in a Sagnac fiber-optic modulator

A. Garcia-Weidner; C. Torres Torres; A. V. Khomenko; M. A. Garcia-Zarate

doi:10.1117/12.437058

14 August 2001 Optoelectronic feedback in a Sagnac fiber-optic modulator

A. Garcia-Weidner, C. Torres Torres, A. V. Khomenko, M. A. Garcia-Zarate

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437058
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

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.

Citation Download Citation

A. Garcia-Weidner, C. Torres Torres, A. V. Khomenko, and M. A. Garcia-Zarate "Optoelectronic feedback in a Sagnac fiber-optic modulator", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437058

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