Supercontinuum Fourier transform spectrometry with balanced detection on a single photodiode
- Brookhaven National Lab. (BNL), Upton, NY (United States); Howard Hughes Medical Inst., Ashburn, VA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
We demonstrate a method of combining a supercontinuum light source with a commercial Fourier transform spectrometer, using a novel approach to dual-beam balanced detection, implemented with phase-sensitive detection on a single light detector. A 40 dB reduction in the relative intensity noise is achieved for broadband light, analogous to conventional balanced detection methods using two matched photodetectors. Unlike conventional balanced detection, however, this method exploits the time structure of the broadband source to interleave signal and reference pulse trains in the time domain, recording the broadband differential signal at the fundamental pulse repetition frequency of the supercontinuum. The method is capable of real-time correction for instability in the supercontinuum spectral structure over a broad range of wavelengths and is compatible with commercially designed spectrometers. A proof-of-principle experimental setup is demonstrated for weak absorption in the 1500-1600 nm region.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC00112704; AC02-98CH10886; AC02- 98CH10886; SC0012704
- OSTI ID:
- 1303027
- Alternate ID(s):
- OSTI ID: 1420632
- Report Number(s):
- BNL-112541-2016-JA; R&D Project: CO006; KC0301020
- Journal Information:
- Journal of Chemical Physics, Vol. 145, Issue 8; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Background-free broadband absorption spectroscopy based on interferometric suppression with a sign-inverted waveform
|
journal | January 2019 |
Baseline-free Quantitative Absorption Spectroscopy Based on Cepstral Analysis | text | January 2019 |
Similar Records
Thomson scattering calibration with ultrabright supercontinuum light source
A benchtop shock physics laboratory: Ultrafast laser driven shock spectroscopy and interferometry methods