Broad beam laser diode with integrated amplifier

Details Broad beam laser diode with integrated amplifier Broad beam laser diode with integrated amplifier

1990-07-30

1992-04-07

Scott, Jr., Leon

Coherent light generators

Particular active media

Semiconductor

372 49, 372102, 372 99, 372 96, H01S 319

Patent

active

051034565

ABSTRACT:
An integrated master oscillator/power amplifier semiconduction device having a laser diode oscillator, a broad area light amplifier and a coupling grating disposed to deflect light at an angle from the laser oscillator to the light amplifier. The amplifier may terminate as an output facet or use a grating surface emitter to couple amplified light out of the device. The orientation angle and grating period of the coupling grating are chosen to minimize feedback from the amplifier into the laser. This is achieved either by deflecting the light by other than a 90.degree. angle or by orienting the grating at other than 45.degree. with respect to laser even though light is deflected by 90.degree. so that any return light effectively "sees" a different grating. The laser can be a DFB or DBR laser and can be wavelength tunable.

REFERENCES:
patent: 5003550 (1991-03-01), Welch et al.

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