Resonator based measurement technique for quantification of minute birefringence

Tuomo Von Lerber, Hanne Ludvigsen, Albert Romann

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We present a new method for quantification of minute birefringence in high-finesse resonators. The method is based on observing the homodyne polarization mode beat at the output of the resonator. We show that die mode beat is generated by a phase mismatch of a polarization mode in the cavity and that the magnitude of the birefringence is proportional to the beat frequency. We demonstrate the sensitivity of the technique by measuring polarization properties of a twisted 0.275 m long single-mode fiber cavity. Maximum beat length of the fiber was found to be 10.6 m, which is almost 40 times longer than the length of the studied fiber.

Original languageEnglish
Pages (from-to)1363-1371
Number of pages9
JournalOptics Express
Issue number7
Publication statusPublished - Apr 2004
Externally publishedYes


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