1 May 2014 Suppression of frequency noise of single mode laser with unbalanced fiber interferometer for subnanometer interferometry
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Abstract
We present a method of noise suppression of laser diodes by unbalanced Michelson fiber interferometer. The unstabilized laser source is represented by compact planar waveguide external cavity laser module ORION (Redfern Integrated Optics, Inc.) working at 1040.57 nm with < 3 kHz linewidth. We built Michelson interferometer with 1 km long arm based on SMF-28 fiber spool to suppress the frequency noise by fast PI servo-loop up to 33 kHz of laser injection current modulation. We were able to decrease the noise level by −60 dBc/Hz up to 1.5 kHz noise frequency of the laser.
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Radek Šmíd, Radek Šmíd, Martin Čížek, Martin Čížek, Břetislav Mikel, Břetislav Mikel, Josef Lazar, Josef Lazar, Ondrej Číp, Ondrej Číp, } "Suppression of frequency noise of single mode laser with unbalanced fiber interferometer for subnanometer interferometry", Proc. SPIE 9132, Optical Micro- and Nanometrology V, 913212 (1 May 2014); doi: 10.1117/12.2052966; https://doi.org/10.1117/12.2052966
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