The influence of power level on injection laser linewidth and intensity fluctuations including side-mode contributions

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/3.7129· OSTI ID:6474157

Miller, S E ^[1]

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1. Bell Communications Research Inc., at 67 Wigwam Rd., Locust, NJ (US)

The contribution of side modes to the main-mode linewidth is calculated as function of power output using analytic relations and verified using a series of Monte Carlo calculations. For well-behaved lasers having photon lifetimes of 0.88 and 1.57 ps and gain compression of 10 percent or less, it is found that the total linewidth decreases monotonically with increasing power output. These lasers have main-mode to side-mode ratios in the range 100-300 at 3 mW output; they exhibit side-mode contributions to main-mode linewidth of 17 and 57 percent respectively at a power level of 10 mW and modal ratios of 940 and 390. When the gain compression exceeds 10 percent as it may in lasers running at 10mW or more, the linewidth can reach a minimum and then increase with increasing power level, in accordance with laboratory observations on some lasers.

• OSTI ID: 6474157
• Journal Information: IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. 24:9; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
COMPRESSION
GAIN
LASERS
LEVEL WIDTHS
LINE WIDTHS
MONTE CARLO METHOD
OPERATION
POWER RANGE 10-100 MW