Simple extrashort external-cavity laser self-mixing interferometer for acceleration sensing

Franck Alexis Chollet; Gopalkrishna M. Hegde; Anand Krishna Asundi; Ai Qun Liu

doi:10.1117/12.447353

30 October 2001 Simple extrashort external-cavity laser self-mixing interferometer for acceleration sensing

Franck Alexis Chollet, Gopalkrishna M. Hegde, Anand Krishna Asundi, Ai Qun Liu

Proceedings Volume 4596, Advanced Photonic Sensors and Applications II; (2001) https://doi.org/10.1117/12.447353
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

Abstract

We have fabricated and tested an external cavity laser with a micromachined flat polysilicon micro-mirror. The device works using a very short external cavity laser configuration (approximately equals 10micrometers ) allowing to remove all optical element in the cavity while providing enough feedback to modulate the intensity of the laser. We have shown that we could obtain feedback coefficient larger than 0.5, providing an increased sensitivity for sensor application. The device shows interesting characteristics for developing a compact and simple displacement/acceleration sensor with large dynamical range and a resolution estimated below 0.01 nm.

Citation Download Citation

Franck Alexis Chollet, Gopalkrishna M. Hegde, Anand Krishna Asundi, and Ai Qun Liu "Simple extrashort external-cavity laser self-mixing interferometer for acceleration sensing", Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); https://doi.org/10.1117/12.447353

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