полупроводниковый лазер

Methods of Autodyne Interferometry of the Distance by Injected Current Modulation of a Semiconductor Laser

Authors: Usanov D. A., Skripal A. V., Dobdin S. Y., Astakhov E. I., Kostyuchenko I. S., Dzhafarov A. V.

Background and Objectives: Two methods of distance interferometry for two types of wave modulation of laser radiation have been presented. The methods of triangular and harmonic wave modulation of a signal have been described. The advantages of the triangular wave modulation method in combination with the use of the frequency of the self-mixing signal spectrum, as well as the advantages of the harmonic wave modulation method in combination with the use of the amplitudes of the self-mixing signal spectrum have been shown.

Self-mixing Interferometry of Distance at Wavelength Modulation of Semiconductor Laser

Authors: Astakhov E. I., Usanov D. A., Skripal A. V., Dobdin S. Y.

Theoretical description for method of distance measurement at alteration emission wavelength of semiconductor laser, operated in self-mixing regime, has been presented. The result of computer modeling of self-mixing signal at harmonic wavelength modulation of laser diode has been represented. Spectral harmonic selection of low-frequency spectrum of self-mixing signal for distance measurement has been theoretically substantiated.