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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1992),
  • paper CTuK63

Increasing the pulse energy of external cavity passively mode-locked QW lasers

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Abstract

It has recently been demonstrated that two-section quantum well (QW) lasers can be passively mode-locked in external cavities to generate stable trains of picosecond pulses.1,2 One section is grounded to act as a saturable absorber, and the other section is pumped to provide gain, as shown in Fig. 1. It is found that as the gain current is increased, multiple pulses circulate in the cavity, due to the limitation on the unsaturated gain level where the leading edge of a pulse circulating in a laser mode-locked by a slow saturable absorber remains stable.1,3,4

© 1992 Optical Society of America

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