Digitally enhanced molecular dispersion spectroscopy

Justin Wong; Chathura P. Bandutunga; Ya Zhang; Malcolm B. Gray; Jong H. Chow

doi:10.1364/OL.409721

Digitally enhanced molecular dispersion spectroscopy

Justin Wong^*, Chathura P. Bandutunga, Ya Zhang, Malcolm B. Gray, Jong H. Chow

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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 × m/^√Hz.

Original language	English
Pages (from-to)	6290-6293
Number of pages	4
Journal	Optics Letters
Volume	45
Issue number	22
DOIs	https://doi.org/10.1364/OL.409721
Publication status	Published - 15 Nov 2020

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title = "Digitally enhanced molecular dispersion spectroscopy",

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 × m/√Hz.",

author = "Justin Wong and Bandutunga, {Chathura P.} and Ya Zhang and Gray, {Malcolm B.} and Chow, {Jong H.}",

note = "Publisher Copyright: {\textcopyright} 2020 Optical Society of America",

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T1 - Digitally enhanced molecular dispersion spectroscopy

AU - Wong, Justin

AU - Bandutunga, Chathura P.

AU - Zhang, Ya

AU - Gray, Malcolm B.

AU - Chow, Jong H.

PY - 2020/11/15

Y1 - 2020/11/15

N2 - 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 × m/√Hz.

AB - 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 × m/√Hz.

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U2 - 10.1364/OL.409721

DO - 10.1364/OL.409721

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SN - 0146-9592

VL - 45

SP - 6290

EP - 6293

JO - Optics Letters

JF - Optics Letters

IS - 22

ER -

Digitally enhanced molecular dispersion spectroscopy

Abstract

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