Journal ArticleDOI
Modulation of the emission frequency of a single-mode homojunction laser by an injection current
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TLDR
In this article, a study of the emission spectra of a cooled singlemode homojunction laser used in scanning interferometers under conditions when a sinusoidal component of frequency ƒm up to 1.2 GHz was superimposed on a constant injection current was made.Abstract:
A study was made of the emission spectra of a cooled single-mode homojunction laser used in scanning interferometers under conditions when a sinusoidal component of frequency ƒm up to 1.2 GHz was superimposed on a constant injection current. It was found that a strong frequency modulation could be achieved for a fairly small depth of amplitude modulation amounting to M ≲ 10%. The frequency modulation coefficient Kfm was within the range 0.1–0.8 GHz/mA, depending on the degree of excess above the threshold and on the frequency ƒm. The physical mechanisms governing the dependence Kfm(ƒm) were analyzed.read more
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Journal ArticleDOI
Analog frequency modulation of radiation emitted by single-mode heterojunction lasers in the spectral range 1.3μ
TL;DR: In this article, the emission spectra of two singlemode heterojunction lasers based on InP-(InGa)AsP structures were determined with a resolution of 50 MHz under conditions of modulation by a small signal superimposed on a constant injection current.
Journal ArticleDOI
Tuning characteristics of an injection laser with a short external dispersive resonator
TL;DR: In this article, the authors attributed the dependence of the refractive index on the electron density to the length of an external resonator, which resulted in continuous tuning of the emission frequency in a range of 60 GHz.
Journal ArticleDOI
Optical signal with high-frequency amplitude beats formed in a frequency-modulated injection laser and an interferometer
TL;DR: In this article, a generator of an optical signal with amplitude beats tunable within the frequency range 0.1-6.0 GHz was constructed on the basis of a homodyne system containing a single-frequency injection laser frequency-modulated by a regular sequence of rectangular current pulses and a Mach-Zehnder interferometer with an optical difference between the arms ensuring a delay of the modulating signal by half a period.
Journal ArticleDOI
Dependence of the current coefficient of frequency modulation of single-mode semiconductor lasers on the constant injection current and on the frequency of the modulating signal
TL;DR: In this paper, an analysis is made of typical dependences of the current coefficient of frequency modulation of single-frequency homojunction lasers on the modulation frequency and on the constant injection current.
References
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Journal ArticleDOI
Continuous-wave single-mode stimulated emission from a semiconductor injection laser with a nonselective resonator
TL;DR: In this paper, it was shown that continuous generation of cw single-mode radiation with a power of up to 0.3 W and line width of less than 400 MHz can be achieved from a liquid-nitrogen-cooled homojunction injection laser.
Journal ArticleDOI
Injection traveling-wave laser amplifier based on a (GaAI)As double heterostructure
TL;DR: Theoretical and experimental investigations were made of single-pass amplification of narrow-band optical signals in resonator-free stripe heterostructures operated at room temperature as discussed by the authors.
Journal ArticleDOI
Frequency modulation of a semiconductor laser by injection current
TL;DR: In this article, the authors investigated the frequency dependence of the efficiency of the modulation of a continuous-wave GaAs laser by varying the injection current and found that this efficiency decreased by a factor of 30 when the modulation frequency was increased from 5 to 200 kHz.
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