Method of reducing the thermally-induced shift in the emission w

Details Method of reducing the thermally-induced shift in the emission w Method of reducing the thermally-induced shift in the emission w

1993-09-09

1994-09-06

Epps, Georgia Y.

Coherent light generators

Particular temperature control

372 96, 372 44, 372 26, H01S 304

Patent

active

053454596

ABSTRACT:
A method of reducing thermally-induced emission wavelength shift in laser diodes. In addition to the conventional ridge contact for supplying the modulation current to the laser diode a second ridge contact is formed on the device. A compensation current of substantially the same frequency as the modulation current but having an opposite phase is applied to the second contact. This compensation current is selected to substantially neutralize the transient temperature variations due to changes in the modulation signal and result in a generally steady state thermal situation.

REFERENCES:
patent: 4751719 (1988-06-01), Mito et al.
patent: 4869568 (1989-09-01), Schimpe
patent: 5170402 (1992-12-01), Ogita et al.
patent: 5274225 (1993-12-01), Gorfinkel et al.

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