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Proceedings Paper • Open Access

2.0 micron wavelength injection seed semiconductor laser for lidar transmitter for global-scale measurements of CO2
Author(s): Siamak Forouhar; Ryan Briggs; Mahmood Bagheri; Clifford Frez; Mathieu Fradet

Paper Abstract

Many of the high accuracy Earth science survey missions are planned to use laser-based remote sensing instruments. The 2-μm laser wavelength is of particular interest due to the presence of many CO2 and H20 absorption lines in its vicinity1. Transmitter architectures are typically composed of an optically pumped, frequency-stable, solid-state seed laser and a high-power optical amplifier.2, 3 Taking advantage of the reliability and relative simplicity of semiconductor lasers, this architecture can substantially improve by replacing the solid-state light source with semiconductor lasers of comparable performance. This approach will greatly improve the system reliability, and will simplify instrument integration and space qualification. There are currently very limited semiconductor lasers operating in the 2-μm range with performance satisfactory enough for use as an injection seed in a laser absorption spectrometer. Optimally, seed lasers producing greater than 50 mW of continuous-wave (CW), with frequency jitter of less than 1 MHz are desired to reliably resolve the CO2 absorption lines near 2-μm. In this paper, we report the demonstration of high-power, single-longitudinal-mode laterally coupled distributed feedback (LC-DFB) lasers at 2.05 μm wavelength. We measured more than 80 mW of CW power at -10 ºC for devices with a 4-μm-wide ridge and 2-mm-long cavity.

Paper Details

Date Published: 12 July 2019
PDF: 6 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111800U (12 July 2019); doi: 10.1117/12.2535949
Show Author Affiliations
Siamak Forouhar, Jet Propulsion Lab. (United States)
Ryan Briggs, Jet Propulsion Lab. (United States)
Mahmood Bagheri, Jet Propulsion Lab. (United States)
Clifford Frez, Jet Propulsion Lab. (United States)
Mathieu Fradet, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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