Modelocking laser including self-tuning intensity-dependent refl

Details Modelocking laser including self-tuning intensity-dependent refl Modelocking laser including self-tuning intensity-dependent refl

1998-01-30

2000-10-31

Sanghavi, Hemang

Coherent light generators

Particular beam control device

Mode locking

372 11, 372 25, 372 45, 372 99, 359839, 359884, H01S 3098, H01S 3113

Patent

active

061413593

ABSTRACT:
The present invention is an improved modelocked laser comprising an optical gain medium and an optical cavity including a self-tuning saturable reflector incorporating one or more quantum wells. In the improved laser, the self-tuning saturable reflector comprises a first Bragg grating having a reflection spectrum broader than the spectrum of desired lasing and an additional Bragg reflector for light in the spectral region of lasing to provide self-starting and stable operation without mechanical tuning. The Bragg reflectors are preferably semiconductor quarter wave reflector stacks, and the saturable absorber is one or more quantum wells within the outer stack. The invention also encompasses the new saturable reflector used in such lasers.

REFERENCES:
patent: 5237577 (1993-08-01), Keller
patent: 5434873 (1995-07-01), Delfyett, Jr.
patent: 5627848 (1997-05-01), Fermann et al.
patent: 5627854 (1997-05-01), Knox
patent: 5701327 (1997-12-01), Cunningham et al.

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