Comb-locked frequency-swept synthesizer for high precision broadband spectroscopy.

ABSTRACT: Frequency combs have made optical metrology accessible to hundreds of laboratories worldwide and they have set new benchmarks in multi-species trace gas sensing for environmental, industrial and medical applications. However, current comb spectrometers privilege either frequency precision and sensitivity through interposition of a cw probe laser with limited tuning range, or spectral coverage and measurement time using the comb itself as an ultra-broadband probe. We overcome this restriction by introducing a comb-locked frequency-swept optical synthesizer that allows a continuous-wave laser to be swept in seconds over spectral ranges of several terahertz while remaining phase locked to an underlying frequency comb. This offers a unique degree of versatility, as the synthesizer can be eithe

SUBMITTER: Gotti R 

PROVIDER: S-EPMC7018949 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature