Method of detecting semiconductor laser mode hopping and semicon

Details Method of detecting semiconductor laser mode hopping and semicon Method of detecting semiconductor laser mode hopping and semicon

1987-02-24

1989-02-28

Evans, F. L.

Optics: measuring and testing

Lamp beam direction or pattern

250201, G01J 142

Patent

active

048079928

ABSTRACT:
Mode hopping of a semiconductor laser is detected by detecting at least one of movement of a laser beam emission point of the semiconductor laser in the longitudinal direction, and movement of the laser beam emission point in transverse directions. The semiconductor laser and/or a collimator lens for collimating a laser beam emitted by the semiconductor laser is moved in the longitudinal direction or in the transverse directions to cancel the movement of the laser beam emission point on the basis of a laser beam emission point signal generated by a mode hopping detecting device for detecting the movement of the laser beam emission point.

REFERENCES:
patent: 4272734 (1981-06-01), Jarrett et al.
patent: 4622672 (1986-11-01), Coldren et al.
patent: 4625315 (1986-11-01), Lemberger et al.
patent: 4699446 (1987-10-01), Banton et al.
patent: 4733253 (1988-03-01), Daniele
patent: 4737798 (1988-04-01), Lonis et al.

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