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The linewidth of GaInAsSb diode lasers operating at 1.8-2.4 micron has been measured using gas absorption line as a frequency discriminator. The linewidth of the lasers varied from 3 to 60 MHz, could alter at least by an order of magnitude, and decrease as the temperature decreases and emission power increases. The results show that GaInAsSb lasers are suitable for high-resolution molecular spectroscopy.
V. G. Avetisov,Amir N. Khusnutdinov,Alexander I. Nadezhdinskii,Yury P. Yakovlev,Alexej N. Baranov, andA. I. Imenkov
"Linewidth of GaInAsSb diode lasers", Proc. SPIE 1724, Tunable Diode Laser Applications, (1 April 1992); https://doi.org/10.1117/12.140317
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V. G. Avetisov, Amir N. Khusnutdinov, Alexander I. Nadezhdinskii, Yury P. Yakovlev, Alexej N. Baranov, A. I. Imenkov, "Linewidth of GaInAsSb diode lasers," Proc. SPIE 1724, Tunable Diode Laser Applications, (1 April 1992); https://doi.org/10.1117/12.140317