Real-time multiplexed digital cavity-enhanced spectroscopy
- UNSW Canberra, Canberra (Australia)
- John Hopkins Univ., Baltimore, MD (United States)
- Defence Science and Technology Organisation, Victoria (Australia)
- Belmont Univ., Nashville, TN (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Cavity-enhanced spectroscopy is a sensitive optical absorption technique but one where the practical applications have been limited to studying small wavelength ranges. In addition, this Letter shows that wideband operation can be achieved by combining techniques usually reserved for the communications community with that of cavity-enhanced spectroscopy, producing a multiplexed real-time cavity-enhanced spectrometer. We use multiple collinear laser sources operating asynchronously and simultaneously while being detected on a single photodetector. This is synonymous with radio frequency (RF) cellular systems in which signals are detected on a single antenna but decoded uniquely. Here, we demonstrate results with spectra of methyl salicylate and show parts-per-billion per root hertz sensitivity measured in real-time.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1233547
- Report Number(s):
- LA-UR-15-23081; OPLEDP; TRN: US1600418
- Journal Information:
- Optics Letters, Vol. 40, Issue 19; ISSN 0146-9592
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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