title: Frequency noise suppression of a single mode laser with an unbalanced fiber interferometer for subnanometer interferometry.
abstract: 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.
authors.affiliation: Institute of Scientific Instruments, v.v.i., Academy of Science of Czech Republic, Královopolská 147, Brno 61264, Czech Republic. smid@isibrno.cz.
authors.forename: Radek
authors.initials: R
authors.lastname: Šmíd
authors.affiliation: Institute of Scientific Instruments, v.v.i., Academy of Science of Czech Republic, Královopolská 147, Brno 61264, Czech Republic. cizek@isibrno.cz.
authors.forename: Martin
authors.initials: M
authors.lastname: Čížek
authors.affiliation: Institute of Scientific Instruments, v.v.i., Academy of Science of Czech Republic, Královopolská 147, Brno 61264, Czech Republic. mikel@isibrno.cz.
authors.forename: Břetislav
authors.initials: B
authors.lastname: Mikel
authors.affiliation: Institute of Scientific Instruments, v.v.i., Academy of Science of Czech Republic, Královopolská 147, Brno 61264, Czech Republic. ocip@isibrno.cz.
authors.forename: Ondřej
authors.initials: O
authors.lastname: Číp