Sensitivity improvement of dual-comb spectroscopy using mode-filtering technique.
Opt Express
; 25(25): 31730-31738, 2017 Dec 11.
Article
in En
| MEDLINE
| ID: mdl-29245844
ABSTRACT
In this study, we demonstrated an improvement in the detection sensitivity of dual-comb spectroscopy using the repetition rate multiplication of optical frequency combs. We compared the dual-comb signals in three dual-comb setups consisting of combinations of two combs with and without mode-filtering, and investigated how the repetition rate influences the signal-to-noise ratio (SNR) of dual-comb measurements. The dual-comb setups using high-repetition-rate combs enabled the absorption lines of HCN gas to be measured with a high SNR in a short averaging time, and real-time spectral data acquisition was realized using a low-sensitivity and low-resolution RF spectrum analyzer.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Diagnostic_studies
Language:
En
Journal:
Opt Express
Journal subject:
OFTALMOLOGIA
Year:
2017
Document type:
Article