Shot-noise-limited doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectrometry

Gang Zhao; Thomas Hausmaninger; Weiguang Ma; Ove Axner

doi:10.1364/OL.43.000715

Shot-noise-limited doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectrometry

Gang Zhao
, Thomas Hausmaninger
, Weiguang Ma
, Ove Axner^*

^*Corresponding author for this work

Not published at VTT

Shanxi University
Umeå University

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

30 Citations (Scopus)

Abstract

Shot-noise-limited Doppler-broadened (Db) noise-immune cavity-enhanced optical heterodyne molecular spectrometry (NICE-OHMS) has been realized by implementation of balanced detection. A characterization of the system based on Allan–Werle plots of the absorption coefficient, retrieved by fitting a model function to data, shows that the system has a white noise equivalent absorption per unit length per square root of bandwidth of 2.3 × 10−¹³ cm⁻¹ Hz⁻¹∕², solely 44% above the shot noise limit, and a detection sensitivity of 2.2 × 10⁻¹⁴ cm⁻¹ over 200 s, both being unprecedented for Db NICE-OHMS. The white noise response follows the expected inverse square root dependence on power that is representative of a shot-noise-limited response, which confirms that the system is shot-noise-limited.

Original language	English
Pages (from-to)	715-718
Number of pages	4
Journal	Optics Letters
Volume	43
Issue number	4
DOIs	https://doi.org/10.1364/OL.43.000715
Publication status	Published - 1 Feb 2018
MoE publication type	A1 Journal article-refereed

Funding

Vetenskapsr?det (VR) (2015-04374); National Natural Science Foundation of China (NSFC) (61675122). Gang thanks China Scholarship Council (CSC) for support.

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10.1364/OL.43.000715

Cite this

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title = "Shot-noise-limited doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectrometry",

abstract = "Shot-noise-limited Doppler-broadened (Db) noise-immune cavity-enhanced optical heterodyne molecular spectrometry (NICE-OHMS) has been realized by implementation of balanced detection. A characterization of the system based on Allan–Werle plots of the absorption coefficient, retrieved by fitting a model function to data, shows that the system has a white noise equivalent absorption per unit length per square root of bandwidth of 2.3 × 10−13 cm−1 Hz−1∕2, solely 44\% above the shot noise limit, and a detection sensitivity of 2.2 × 10−14 cm−1 over 200 s, both being unprecedented for Db NICE-OHMS. The white noise response follows the expected inverse square root dependence on power that is representative of a shot-noise-limited response, which confirms that the system is shot-noise-limited.",

author = "Gang Zhao and Thomas Hausmaninger and Weiguang Ma and Ove Axner",

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doi = "10.1364/OL.43.000715",

language = "English",

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AU - Zhao, Gang

AU - Hausmaninger, Thomas

AU - Ma, Weiguang

AU - Axner, Ove

N1 - Funding Information: Vetenskapsrådet (VR) (2015-04374); National Natural Science Foundation of China (NSFC) (61675122). Gang thanks China Scholarship Council (CSC) for support. Publisher Copyright: © 2018 Optical Society of America

PY - 2018/2/1

Y1 - 2018/2/1

N2 - Shot-noise-limited Doppler-broadened (Db) noise-immune cavity-enhanced optical heterodyne molecular spectrometry (NICE-OHMS) has been realized by implementation of balanced detection. A characterization of the system based on Allan–Werle plots of the absorption coefficient, retrieved by fitting a model function to data, shows that the system has a white noise equivalent absorption per unit length per square root of bandwidth of 2.3 × 10−13 cm−1 Hz−1∕2, solely 44% above the shot noise limit, and a detection sensitivity of 2.2 × 10−14 cm−1 over 200 s, both being unprecedented for Db NICE-OHMS. The white noise response follows the expected inverse square root dependence on power that is representative of a shot-noise-limited response, which confirms that the system is shot-noise-limited.

AB - Shot-noise-limited Doppler-broadened (Db) noise-immune cavity-enhanced optical heterodyne molecular spectrometry (NICE-OHMS) has been realized by implementation of balanced detection. A characterization of the system based on Allan–Werle plots of the absorption coefficient, retrieved by fitting a model function to data, shows that the system has a white noise equivalent absorption per unit length per square root of bandwidth of 2.3 × 10−13 cm−1 Hz−1∕2, solely 44% above the shot noise limit, and a detection sensitivity of 2.2 × 10−14 cm−1 over 200 s, both being unprecedented for Db NICE-OHMS. The white noise response follows the expected inverse square root dependence on power that is representative of a shot-noise-limited response, which confirms that the system is shot-noise-limited.

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Shot-noise-limited doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectrometry

Abstract

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