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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1997),
  • paper QWD1

Longitudinal mode-partition noise in diode lasers

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Abstract

Constant-current-driven diode lasers at high pumping often show noise (intensity noise) larger than the shot-noise contrary to the squeezing predicted by theory. Some researchers have speculated that the excess noise comes from the mode-partition noise that results from division of saturated gain into several different longitudinal modes.1 We, for the first time, we believe, have measured the mode-partition noise of the free-running as well as the injection-locked and external-cavity diode lasers using an interferometer. By comparing the mode-partition noise and the total noise in the three cases, we were able to demonstrate the relation between the two.

© 1997 Optical Society of America

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