Title :
Influence of spontaneous frequency fluctuations on lineshape of semiconductor laser modulated by a pseudorandom pumping current
Author :
Morozov, Yuri A.
Author_Institution :
Inst. of Radio Eng. & Electron., Acad. of Sci., Saratov, Russia
Abstract :
The lineshape of a single-mode semiconductor laser is studied numerically for fast pseudorandom current modulation. We analyze the contribution of frequency fluctuations originated from spontaneous emission to the laser spectrum. The expression is derived for the nonstationary phase increment determining the influence of frequency noise on the lineshape. The obtained results show that spectral characteristics of laser radiation substantially depends on the spontaneous emission factor as well as on parameters of modulation.
Keywords :
electro-optical modulation; fluctuations; laser modes; laser theory; semiconductor device models; semiconductor lasers; spectral line breadth; spontaneous emission; fast pseudorandom current modulation; frequency fluctuations; frequency noise; laser radiation; laser spectrum; modulated semiconductor laser lineshape; nonstationary phase increment; pseudorandom pumping current; spectral characteristics; spontaneous emission factor; spontaneous frequency fluctuations; Chirp modulation; Fluctuations; Frequency; Laser excitation; Laser noise; Optical noise; Pump lasers; Semiconductor device noise; Semiconductor lasers; Spontaneous emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2003.817238
