Linewidth of CaSbInAs diode lasers

V. G. Avetisov; Amir N. Khusnutdinov; Alexander I. Nadezhdinskii; Yury P. Yakovlev; Alexej N. Baranov; Albert N. Imenkov

doi:10.1117/12.131186

1 July 1992 Linewidth of CaSbInAs diode lasers

V. G. Avetisov, Amir N. Khusnutdinov, Alexander I. Nadezhdinskii, Yury P. Yakovlev, Alexej N. Baranov, Albert N. Imenkov

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Proceedings Volume 1811, Tenth All-Union Symposium and School on High-Resolution Molecular Spectroscopy; (1992) https://doi.org/10.1117/12.131186
Event: Tenth All-Union Symposium and School on High Resolution Molecular Spectroscopy, 1991, Omsk, Russian Federation

Abstract

In all high resolution applications the quality of a diode laser as a source of coherent light is quite essential. For high resolution spectroscopy, the question is how much the recorded absorption line is broadened and what are its shape distortions due to the diode laser frequency fluctuations. From this point of view, the emission line width is the most popular parameter of diode lasers (although it is not always correct). Almost all recent studies of diode laser line width used the homodyne technique, which uses single mode fibers. The possibility of delaying a signal for several tens of microseconds provides high frequency resolution (down to 10 kHz), and besides, there is no need to stabilize the diode laser frequency. Currently, wavelength range of the technique is limited by transmission region of the quartz fiber, i.e., from 0.5 to 1.6 micrometers . Another approach is to use molecular absorption line or interferometer as a frequency discriminator, an absorption line being more convenient because it does not produce accidental optical feedback on the diode laser. This work was aimed at measuring the line width of CaSbInAs diode lasers, operating in the 1.8 - 2.4 micrometers region.

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V. G. Avetisov, Amir N. Khusnutdinov, Alexander I. Nadezhdinskii, Yury P. Yakovlev, Alexej N. Baranov, and Albert N. Imenkov "Linewidth of CaSbInAs diode lasers", Proc. SPIE 1811, Tenth All-Union Symposium and School on High-Resolution Molecular Spectroscopy, (1 July 1992); https://doi.org/10.1117/12.131186

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