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Sensors 2015, 15(1), 1342-1353; doi:10.3390/s150101342

Frequency Noise Suppression of a Single Mode Laser with an Unbalanced Fiber Interferometer for Subnanometer Interferometry

Institute of Scientific Instruments, v.v.i., Academy of Science of Czech Republic, Královopolská 147, Brno 61264, Czech Republic
Author to whom correspondence should be addressed.
Received: 28 October 2014 / Accepted: 31 December 2014 / Published: 12 January 2015
(This article belongs to the Special Issue Optical Sensors for Chemical, Biological and Industrial Applications)
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We present a method of noise suppression of laser diodes by an unbalanced Michelson fiber interferometer. The unstabilized laser source is represented by compact planar waveguide external cavity laser module, ORIONTM (Redfern Integrated Optics, Inc.), working at 1540.57 nm with a 1.5-kHz linewidth. We built up the unbalanced Michelson interferometer with a 2.09 km-long arm based on the standard telecommunication single-mode fiber (SMF-28) spool to suppress the frequency noise by the servo-loop control by 20 dB to 40 dB within the Fourier frequency range, remaining the tuning range of the laser frequency. View Full-Text
Keywords: unbalanced interferometer; fiber spool; PI control; frequency noise unbalanced interferometer; fiber spool; PI control; frequency noise

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Šmíd, R.; Čížek, M.; Mikel, B.; Číp, O. Frequency Noise Suppression of a Single Mode Laser with an Unbalanced Fiber Interferometer for Subnanometer Interferometry. Sensors 2015, 15, 1342-1353.

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