Frequency locking of an extended-cavity quantum cascade laser to a frequency comb for precision mid infrared spectroscopy
Type
PresentationAuthors
Alsaif, BidoorLamperti, Marco

Gatti, Davide

Laporta, Paolo
Fermann, Martin E.
Farooq, Aamir

Marangoni, Marco
KAUST Department
Chemical Kinetics & Laser Sensors LaboratoryClean Combustion Research Center
Electrical Engineering Program
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2017-11-02Online Publication Date
2017-11-02Print Publication Date
2017-06Permanent link to this record
http://hdl.handle.net/10754/626115
Metadata
Show full item recordAbstract
Extended-cavity quantum cascade lasers (EC-QCLs) enable mode-hope-free frequency sweeps in the mid-infrared region over ranges in excess of 100 cm−1, at speeds up to 1 THz/s and with a 100-mW optical power level. This makes them ideally suited for broadband absorption spectroscopy and for the simultaneous detection of multiple gases. On the other hand, their use for precision spectroscopy has been hampered so far by a large amount of frequency noise, resulting in an optical linewidth of about 30 MHz over 50 ms [1]. This is one of the reasons why neither their frequency nor their phase have been so far locked to a frequency comb. Their use in combination with frequency combs has been performed in an open loop regime only [2], which has the merit of preserving the inherently fast modulation speed of these lasers, yet not to afford high spectral resolution and accuracy.Citation
Alsaif B, Lamperti M, Gatti D, Laporta P, Fermann ME, et al. (2017) Frequency locking of an extended-cavity quantum cascade laser to a frequency comb for precision mid infrared spectroscopy. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). Available: http://dx.doi.org/10.1109/cleoe-eqec.2017.8087487.Sponsors
This work was supported by the project FEAST (OSR-2016-CCF-1975-06).Additional Links
http://ieeexplore.ieee.org/document/8087487/ae974a485f413a2113503eed53cd6c53
10.1109/cleoe-eqec.2017.8087487