Voltage pulsations in photogalvanic crystals as power supply for EO-modulator

Matthew E. Edwards; Nickolai Kukhtarev; Tatiana Kukhtareva; Jai-Ching Wang; Mekonen Bayssie; Sergei F. Lyuksyutov; Micheal A. Reagan

doi:10.1117/12.529671

25 June 2004 Voltage pulsations in photogalvanic crystals as power supply for EO modulator

Matthew E. Edwards, Nickolai Kukhtarev, Tatiana Kukhtareva, Jai-Ching Wang, Mekonen Bayssie, Sergei F. Lyuksyutov, Micheal A. Reagan

Author Affiliations +

Proceedings Volume 5363, Emerging Optoelectronic Applications; (2004) https://doi.org/10.1117/12.529671
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

Abstract

We have developed the all-optical EO-modulator using a pulsed photogalvanic power supply driven by light illumination (coherent and incoherent). Generated by ferroelectric crystal with the photogalvanic effect (Fe-doped LiNbO₃), electrical pulses were used for driving a standard EO-modulator, based on transversal EO effect in Bi₁₂SiO₂₀ (BSO) crystals. Both parallel and serial connections of photogalvanic crystal (LN), BSO and oscilloscope were tested. The depth of EO-modulation was very sensitive to the impedance of the connected cables, which implies the existence of transmission-line resonances. Secondly, a more compact version of EO self-modulation is realized with green (wavelength λ=532 nm, P=100mW) solid-state CW laser. In this case, reflection of the CW laser from the LN crystal was modulated in time. Pulsating optical reflection was correlated with the pulsating electrical signals. We report both modes of operation: (1) as pulsed high-voltage power supply, and (2) as compact-pulsed optical modulator. We have described these pulsations using model of photogalvanic effect and ferroelectric emission.

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Matthew E. Edwards, Nickolai Kukhtarev, Tatiana Kukhtareva, Jai-Ching Wang, Mekonen Bayssie, Sergei F. Lyuksyutov, and Micheal A. Reagan "Voltage pulsations in photogalvanic crystals as power supply for EO modulator", Proc. SPIE 5363, Emerging Optoelectronic Applications, (25 June 2004); https://doi.org/10.1117/12.529671

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