Active feedback regulation of a Michelson interferometer to achieve zero-background absorption measurements

Patrik Lundin, Zuguang Guan, Sune Svanberg

Research output: Contribution to journalArticlepeer-review

6 Citations (SciVal)

Abstract

An active phase-controlling scheme based on a proportional-integral-derivative-controlled piezoelectric transducer is presented with the purpose of stabilizing a quasi-zero-background absorption spectrometer. A fiber-based balanced Michelson interferometer is used, and absorption due to a gas sample in one of its arms results in an increased light signal to a detector, which otherwise, thanks to destructive interference, experiences a very low light level. With the presented approach, the sensitivity of already potent absorption measurement techniques, e.g., based on modulation, could be improved even further. (C) 2011 Optical Society of America
Original languageEnglish
Pages (from-to)373-378
JournalApplied Optics
Volume50
Issue number3
DOIs
Publication statusPublished - 2011

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

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