Generation of equidistant frequencies in a semiconductor laser with an external cavity

A cw semiconductor laser with external feedback provided by a diffraction grating was investigated experimentally. The laser drive current was modulated at a frequency of 0.3-5 GHz. The spectrum of the output radiation consisted of several equidistant frequencies and the intervals between these freq...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 1999-02, Vol.29 (2), p.109-113
Main Authors: Bagayev, S N, Volkov, V G, Ivashko, D Yu, Matyugin, Yu A, Fateev, N V
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CURRENTS
DIFFRACTION GRATINGS
ELECTRIC CURRENTS
FREQUENCY MODULATION
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
LASERS
LEVEL WIDTHS
MODULATION
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SOLID STATE LASERS
SPECTRA
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Summary:A cw semiconductor laser with external feedback provided by a diffraction grating was investigated experimentally. The laser drive current was modulated at a frequency of 0.3-5 GHz. The spectrum of the output radiation consisted of several equidistant frequencies and the intervals between these frequencies were determined by the current-modulation frequency. Optimal conditions were found for the generation of the maximum number of such frequency components. The maximum width of the spectrum was 48 GHz. A method was developed for measuring the difference frequencies in the optical range with the aid of such lasers. (lasers)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE1999v029n02ABEH001426