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 | |
| Publication status | Published - 13 Nov 2017 |
| MoE publication type | A1 Journal article-refereed |
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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
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.
UR - http://www.scopus.com/inward/record.url?scp=85033585268&partnerID=8YFLogxK
U2 - 10.1364/OE.25.029454
DO - 10.1364/OE.25.029454
M3 - Article
AN - SCOPUS:85033585268
VL - 25
SP - 29454
EP - 29471
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 23
ER -