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Digitally enhanced molecular dispersion spectroscopy

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Date

2020

Authors

Wong, Justin
Bandutunga, Chathura
Zhang, Ya
Gray, Malcolm
Chow, Jong

Journal Title

Journal ISSN

Volume Title

Publisher

Optical Society of America

Abstract

A frequency and intensity noise immune fiber dispersion spectrometer with a digitally enhanced homodyne phase extraction system is presented. A hydrogen cyanide (H13CN) vapor cell is placed in a digitally enhanced Sagnac interferometer, and the anomalous dispersion at the 1550.515 nm P11 transition is interrogated with a tunable laser. An analytical model of the dispersion induced phase readout shows close agreement with the experimentally obtained phase signal. Immunity to frequency and intensity noise confers sub-microradian phase sensitivity, corresponding to a spectroscopic detection limit of 77ppb x m/√Hz.

Description

Keywords

Citation

URI

http://hdl.handle.net/1885/289732

Collections

ANU Research Publications

Source

Optics Letters

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1364/OL.409721

Restricted until

2099-12-31

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Digitally enhanced molecular dispersion.pdf (1.14 MB)

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