Adaptive real-time dual-comb spectroscopy

被引：343

作者：

Ideguchi, Takuro ^{[1
]}

Poisson, Antonin ^{[2
]}

Guelachvili, Guy ^{[2
]}

Picque, Nathalie ^{[1
,2
,3
]}

Hansch, Theodor W. ^{[1
,3
]}

机构：

[1] Max Planck Inst Quantum Opt, Laser Spect Div, D-85748 Garching, Germany

[2] Univ Paris Sud, CNRS, Inst Sci Mol Orsay, F-91405 Orsay, France

[3] Univ Munich, Fak Phys, D-80799 Munich, Germany

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

欧洲研究理事会;

关键词：

HIGH-RESOLUTION; MU-M; FREQUENCY; RANGE;

D O I：

10.1038/ncomms4375

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The spectrum of a laser frequency comb consists of several hundred thousand equally spaced lines over a broad spectral bandwidth. Such frequency combs have revolutionized optical frequency metrology and they now hold much promise for significant advances in a growing number of applications including molecular spectroscopy. Despite an intriguing potential for the measurement of molecular spectra spanning tens of nanometres within tens of microseconds at Doppler-limited resolution, the development of dual-comb spectroscopy is hindered by the demanding stability requirements of the laser combs. Here we overcome this difficulty and experimentally demonstrate a concept of real-time dual-comb spectroscopy, which compensates for laser instabilities by electronic signal processing. It only uses free-running mode-locked lasers without any phase-lock electronics. We record spectra spanning the full bandwidth of near-infrared fibre lasers with Doppler-limited line profiles highly suitable for measurements of concentrations or line intensities. Our new technique of adaptive dual-comb spectroscopy offers a powerful transdisciplinary instrument for analytical sciences.

引用

页数：8

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