Chinese Optics Letters, 2017, 15 (3): 031401, Published Online: Jul. 25, 2018
Frequency-stabilized laser system at 1572 nm for space-borne CO2 detection LIDAR
140.3425 Laser stabilization 300.6380 Spectroscopy, modulation 350.6090 Space optics 280.1910 DIAL, differential absorption lidar
Abstract
A frequency-stabilized laser system at 1572 nm for space-borne carbon dioxide (CO 2 ) detection LIDAR to realize the precise measurement of the global atmospheric CO 2 concentration is presented in this Letter. A distributed-feedback laser diode serves as the master laser (ML) and is wavelength locked to the CO 2 line center at 1572.0179 nm using the external frequency modulation technique. The root mean square frequency drift is suppressed to about 50 kHz at an average time of 0.1 s over 8 h. Based on optical phase-locked loops, an online seeder and an offline seeder are offset locked to the reference laser at 1572.024 and 1572.081 nm, respectively, retaining virtually the same frequency stability as the ML.
Juan Du, Yanguang Sun, Dijun Chen, Yongji Mu, Minjie Huang, Zhongguo Yang, Jiqiao Liu, Decang Bi, Xia Hou, Weibiao Chen. Frequency-stabilized laser system at 1572 nm for space-borne CO2 detection LIDAR[J]. Chinese Optics Letters, 2017, 15(3): 031401.