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^*

^*Corresponding author for this work

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",

volume = "25",

pages = "29454--29471",

journal = "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. / Zhao, Gang; Hausmaninger, Thomas; Ma, Weiguang et al.
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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EP - 29471

JO - Optics Express

JF - Optics Express

IS - 23

ER -

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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