Variable stripe width semiconductor laser

Details Variable stripe width semiconductor laser Variable stripe width semiconductor laser

1974-09-19

1976-05-25

Edlow, Martin H.

Oscillators

Relaxation oscillators

357 16, 357 17, 331 945H, H01S 3319, H01L 29161

Patent

active

039598080

ABSTRACT:
A variable stripe width semiconductor laser is provided in which, in addition to the contact stripe and back contact, a third contact is provided. By applying a positive bias to the third contact the current spread in the device is reduced, increasing the effective current density at the lasing position. By varying, or pulsing, the applied position bias the current density can be caused to vary above and below a threshold and switch the laser on and off. Further, by application of a suitable positive bias, unwanted higher order modes can be eliminated.

REFERENCES:
patent: 3431512 (1969-03-01), Redfield
patent: 3551842 (1970-12-01), Nelson
patent: 3702975 (1972-11-01), Miller

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