Linewidth reduction of a 30mW-405nm GaN violet laser diode by optical-electrical double feedback method

Kouki Mizutani; Toshiki Kuromori; Wakao Sasaki

doi:10.1117/12.843006

25 February 2010 Linewidth reduction of a 30mW-405nm GaN violet laser diode by optical-electrical double feedback method

Kouki Mizutani, Toshiki Kuromori, Wakao Sasaki

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Proceedings Volume 7597, Physics and Simulation of Optoelectronic Devices XVIII; 759725 (2010) https://doi.org/10.1117/12.843006
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

We have demonstrated a compact and efficient frequency stabilization system based on Pound-Drever-Hall method, along with optical feedback. The frequency of a 30mW 405nm GaN violet laser diode (LD) was stabilized to a reference confocal Fabry-Perot cavity (CFP cavity) by negative electrical feedback to the injection current of the LD based on Pound-Drever-Hall technique. Moreover, by employing optical feedback from another tilted CFP cavity, the residual frequency noise has been efficiently suppressed. The minimum square root of the Allan variance was 1.65×10^-11 at the integration time of 0.5s under the optical-electrical double feedback condition. We have achieved the stabilization of visible violet LD by optical feedback method for the first time.

Citation Download Citation

Kouki Mizutani, Toshiki Kuromori, and Wakao Sasaki "Linewidth reduction of a 30mW-405nm GaN violet laser diode by optical-electrical double feedback method", Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 759725 (25 February 2010); https://doi.org/10.1117/12.843006

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