High-speed MEMS swept-wavelength light source for FBG sensor system

Takanori Saitoh; Kenichi Nakamura; Yoshifumi Takahashi; Koichiro Miyagi

doi:10.1117/12.623604

23 May 2005 High-speed MEMS swept-wavelength light source for FBG sensor system

Takanori Saitoh, Kenichi Nakamura, Yoshifumi Takahashi, Koichiro Miyagi

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623604
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

A high-speed MEMS swept-wavelength light source (SLS) for an FBG sensor system is proposed and demonstrated. It is basically a multi-mode external-cavity laser diode (LD), and consists mainly of an LD head, diffraction grating, and electromagnetically actuated MEMS scanning mirror. It has a linewidth of 0.03 nm, scan range from 1508 to 1582 nm, scan rate of 0.57 ms and output power of 10 mW. The heart of the MEMS SLS is the MEMS scanning mirror (8 x 6 mm) that changes the oscillation wavelength continuously and rapidly. The scanning mirror is actuated by electromagnetic force derived from a permalloy piece glued on the back of the mirror and a C-shape electromagnet. The MEMS SLS allows construction of a low-cost, simple and high-speed FBG interrogator system.

Citation Download Citation

Takanori Saitoh, Kenichi Nakamura, Yoshifumi Takahashi, and Koichiro Miyagi "High-speed MEMS swept-wavelength light source for FBG sensor system", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623604

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