Optical feedback locking of semiconductor lasers

Details Optical feedback locking of semiconductor lasers Optical feedback locking of semiconductor lasers

1988-10-18

1990-03-06

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Optical output stabilization

372 18, 372 75, 372 26, H01S 313

Patent

active

049072374

ABSTRACT:
An optical method and apparatus is disclosed for stabilizing the frequency f semiconductor lasers. The basic system includes only the optical elements of a conventional semiconductor laser optically coupled to a separate, external resonator having an optical cavity with a particular resonance frequency. The optical geometry is configured such that the output from the resonator is fed back to the laser only when the laser frequency matches or substantially matches the resonance frequency. In other disclosed embodiments, optical electronic feedback loops are used to modulate the laser injection current to stabilize the frequency and to adjust the phase of the optical feedback signal.

REFERENCES:
patent: 4221472 (1980-09-01), Smith et al.
patent: 4446556 (1984-05-01), Koepf
patent: 4713818 (1987-12-01), Lee
patent: 4730105 (1988-03-01), Mitschke et al.
patent: 4751705 (1988-07-01), Hadley et al.

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