Wavelength locking to CO2 absorption line-center for 2-um pulsed IPDA lidar application

Tamer F. Refaat; Mulugeta Petros; Charles W. Antill Jr.; Upendra N. Singh; Jirong Yu

doi:10.1117/12.2224950

5 May 2016 Wavelength locking to CO₂ absorption line-center for 2-μm pulsed IPDA lidar application

Tamer F. Refaat, Mulugeta Petros, Charles W. Antill Jr., Upendra N. Singh, Jirong Yu

Proceedings Volume 9879, Lidar Remote Sensing for Environmental Monitoring XV; 987904 (2016) https://doi.org/10.1117/12.2224950
Event: SPIE Asia-Pacific Remote Sensing, 2016, New Delhi, India

Abstract

An airborne 2-m triple-pulse integrated path differential absorption (IPDA) lidar is currently under development at NASA Langley Research Center (LaRC). This IPDA lidar system targets both atmospheric carbon dioxide (CO₂) and water vapor (H₂O) column measurements. Independent wavelength control of each of the transmitted laser pulses is a key feature for the success of this instrument. The wavelength control unit provides switching, tuning and locking for each pulse in reference to a 2-μm CW laser source locked to CO₂ line-center. Targeting the CO₂ R30 line center, at 2050.967 nm, a wavelength locking unit has been integrated using semiconductor laser diode. The CO₂ center-line locking unit includes a laser diode current driver, temperature controller, center-line locking controller and CO₂ absorption cell. This paper presents the CO₂center-line locking unit architecture, characterization procedure and results. Assessment of wavelength jitter on the IPDA measurement error will also be addressed by comparison to the system design.

Citation Download Citation

Tamer F. Refaat, Mulugeta Petros, Charles W. Antill Jr., Upendra N. Singh, and Jirong Yu "Wavelength locking to CO₂ absorption line-center for 2-μm pulsed IPDA lidar application", Proc. SPIE 9879, Lidar Remote Sensing for Environmental Monitoring XV, 987904 (5 May 2016); https://doi.org/10.1117/12.2224950

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