The effect of side modes on linewidth and intensity fluctuations in semiconductor lasers
Journal Article
·
· IEEE J. Quant. Electron.; (United States)
The influence of side modes on the linewidth and intensity fluctuations of the main mode is studied using Monte Carlo techniques. Explicit analytic relations are developed for the side-mode induced linewidth, using impulse responses of the laser obtained from rate equations. It is found that both the absolute level of the main-mode to side-mode power ratio and the passive loss in the side mode influence the main-mode linewidth. A typical 3mW laser has negligible linewidth enhancement from the side mode if the modal power ratio is about 300/1 (or greater), a corresponding to a side-mode loss of 0.2-0.5 dB (or more) for one roundtrip within the laser resonator. Lower side-mode losses yield an abrupt catastrophic increase in main-mode linewidth.
- Research Organization:
- Bell Communications Research, Inc., 67 Wigwam Rd., Locust, NJ (US)
- OSTI ID:
- 7030004
- Journal Information:
- IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. 24:5; ISSN IEJQA
- Country of Publication:
- United States
- Language:
- English
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