Differential noise-immune cavity-enhanced optical heterodyne molecular spectroscopy for improvement of the detection sensitivity by reduction of drifts from background signals

Gang Zhao; Thomas Hausmaninger; Weiguang Ma; Ove Axner

doi:10.1364/OE.25.029454

Differential noise-immune cavity-enhanced optical heterodyne molecular spectroscopy for improvement of the detection sensitivity by reduction of drifts from background signals

Gang Zhao, Thomas Hausmaninger, Weiguang Ma, Ove Axner

Not published at VTT

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

14 Citations (Scopus)

Abstract

The detection sensitivity of noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) is often limited by background signals that bring in drifts. A novel realization of NICE-OHMS, termed differential NICE-OHMS, that both reduces such drifts and enlarges the molecular signal is presented. It is based on simultaneous detection of NICE-OHMS signals in reflection and transmission, followed by a subtraction of the former (properly weighted) from the latter. An Allan plot analysis shows that the instrumentation could demonstrate a noise equivalent absorption per unit length (NEAL) of 4.7 × 10⁻¹⁴ cm⁻¹, obtained for an integration time of 170 s.

Original language	English
Pages (from-to)	29454-29471
Number of pages	18
Journal	Optics Express
Volume	25
Issue number	23
DOIs	https://doi.org/10.1364/OE.25.029454
Publication status	Published - 13 Nov 2017
MoE publication type	A1 Journal article-refereed

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10.1364/OE.25.029454

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title = "Differential noise-immune cavity-enhanced optical heterodyne molecular spectroscopy for improvement of the detection sensitivity by reduction of drifts from background signals",

abstract = "The detection sensitivity of noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) is often limited by background signals that bring in drifts. A novel realization of NICE-OHMS, termed differential NICE-OHMS, that both reduces such drifts and enlarges the molecular signal is presented. It is based on simultaneous detection of NICE-OHMS signals in reflection and transmission, followed by a subtraction of the former (properly weighted) from the latter. An Allan plot analysis shows that the instrumentation could demonstrate a noise equivalent absorption per unit length (NEAL) of 4.7 × 10−14 cm−1, obtained for an integration time of 170 s.",

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

note = "Funding Information: We thank Ume{\aa} University{\textquoteright}s program “Strong research environments” for support. Gang thanks China Scholarship Council (CSC) for support. Funding Information: Swedish Research Council (VR) (2015-04374); Kempe foundations (JCK 1317); National Natural Science Foundation of China (NSFC) (61675122). Publisher Copyright: {\textcopyright} 2017 Optical Society of America. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

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doi = "10.1364/OE.25.029454",

language = "English",

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Differential noise-immune cavity-enhanced optical heterodyne molecular spectroscopy for improvement of the detection sensitivity by reduction of drifts from background signals. / Zhao, Gang; Hausmaninger, Thomas; Ma, Weiguang; Axner, Ove.

In: Optics Express, Vol. 25, No. 23, 13.11.2017, p. 29454-29471.

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

TY - JOUR

T1 - Differential noise-immune cavity-enhanced optical heterodyne molecular spectroscopy for improvement of the detection sensitivity by reduction of drifts from background signals

AU - Zhao, Gang

AU - Hausmaninger, Thomas

AU - Ma, Weiguang

AU - Axner, Ove

N1 - Funding Information: We thank Umeå University’s program “Strong research environments” for support. Gang thanks China Scholarship Council (CSC) for support. Funding Information: Swedish Research Council (VR) (2015-04374); Kempe foundations (JCK 1317); National Natural Science Foundation of China (NSFC) (61675122). Publisher Copyright: © 2017 Optical Society of America. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017/11/13

Y1 - 2017/11/13

N2 - The detection sensitivity of noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) is often limited by background signals that bring in drifts. A novel realization of NICE-OHMS, termed differential NICE-OHMS, that both reduces such drifts and enlarges the molecular signal is presented. It is based on simultaneous detection of NICE-OHMS signals in reflection and transmission, followed by a subtraction of the former (properly weighted) from the latter. An Allan plot analysis shows that the instrumentation could demonstrate a noise equivalent absorption per unit length (NEAL) of 4.7 × 10−14 cm−1, obtained for an integration time of 170 s.

AB - The detection sensitivity of noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) is often limited by background signals that bring in drifts. A novel realization of NICE-OHMS, termed differential NICE-OHMS, that both reduces such drifts and enlarges the molecular signal is presented. It is based on simultaneous detection of NICE-OHMS signals in reflection and transmission, followed by a subtraction of the former (properly weighted) from the latter. An Allan plot analysis shows that the instrumentation could demonstrate a noise equivalent absorption per unit length (NEAL) of 4.7 × 10−14 cm−1, obtained for an integration time of 170 s.

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JO - Optics Express

JF - Optics Express

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Differential noise-immune cavity-enhanced optical heterodyne molecular spectroscopy for improvement of the detection sensitivity by reduction of drifts from background signals

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