Linewidth reduction of a 30-mW 657-nm visible laser diode by optical-electrical double feedback method

Shintaro Hisatake; Masahrio Fukushima; Yoshihiro Kurokawa; Wakao Sasaki

doi:10.1117/12.426900

17 May 2001 Linewidth reduction of a 30-mW 657-nm visible laser diode by optical-electrical double feedback method

Shintaro Hisatake, Masahrio Fukushima, Yoshihiro Kurokawa, Wakao Sasaki

Proceedings Volume 4285, Testing, Reliability, and Applications of Optoelectronic Devices; (2001) https://doi.org/10.1117/12.426900
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

Abstract

We have stabilized frequency of 35mW 680nm visible laser diode (LD) by using simple frequency stabilization system based on optical-electrical double feedback method. For the long-term frequency stabilization, frequency of the 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 technique. By employing optical feedback from another tilted CFP cavity along with electrical feedback, the residual frequency noise has been efficiently suppressed. The achieved PSD of frequency fluctuation under optical-electrical double feedback condition was less thani x 1 05[Hz2 1Hz] within the Fourier frequency <10 MHz. The reduced linewidth under the double feedback condition is estimated to be narrower than at least 400 kFIz, which seems to be the resolution limit of our measurement. The minimum square root of the Allan variance is 3 .9 x 10' at the integration time of 0.1 msec under the double feedback condition.

Citation Download Citation

Shintaro Hisatake, Masahrio Fukushima, Yoshihiro Kurokawa, and Wakao Sasaki "Linewidth reduction of a 30-mW 657-nm visible laser diode by optical-electrical double feedback method", Proc. SPIE 4285, Testing, Reliability, and Applications of Optoelectronic Devices, (17 May 2001); https://doi.org/10.1117/12.426900

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