Coherent light generators – Particular active media – Semiconductor
Patent
1988-04-25
1989-10-03
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
357 17, 372 96, 372108, H01S 305, H01S 319
Patent
active
048721760
ABSTRACT:
A light emitting device which has a substrate and a cavity region overlying the substrate. The cavity region has a grating region overlying exposed portions of the surface formed of a first grating region having a first period and a second grating region having a period different from the first region. On other portions of the cavity region an active region overlies the cavity layer and a capping layer overlies the active region. The device is monitored by forming a surface emitting device with first and second gratings with the gratings having different periods. Current is applied to the device such that radiation is emitted from the grating and the output is detected from the second grating such that the current to the device is adjusted based on the output of the second grating.
REFERENCES:
patent: 3753801 (1973-08-01), Lockwood et al.
patent: 4156206 (1979-05-01), Comerford et al.
patent: 4532632 (1985-07-01), Yamashita et al.
patent: 4701930 (1987-10-01), Akiba et al.
Phase Locked Operation of Coupled Pairs of Grating-Surface-Emitting Diode Lasers, by J. M. Hammer et al., Appl. Phys. Lett., vol. 50, No. 11, Mar. 16, 1987, pp. 659-661.
Phase Locked Operation of a Grating-Surface-Emitting Diode Laser Array, by N. W. Carlson et al., Appl. Phys. Lett., vol. 50, No. 19, May 11, 1987, pp. 1301-1303.
Efficient 30 mW Grating Surface-Emitting Lasers, by G. A. Evans et al., Appl. Phys. Lett., vol. 51, No. 19, Nov. 9, 1987, pp. 1478-1480.
Surface-Emitting Second Order Distributed Bragg Reflector Laser with Dynamic Wavelength Stabilization and Far-Field Angle of 0.25.degree., by G. A. Evans et al., Appl. Phys. Lett., vol. 49, No. 6, Aug. 11, 1986, pp. 314-315.
Davie James W.
Davis Jr. James C.
General Electric Company
Steckler Henry I.
Webb II Paul R.
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