Coherent light generators – Particular active media – Semiconductor
Patent
1986-02-10
1988-01-12
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 32, 372 45, 372108, H01S 310
Patent
active
047196351
ABSTRACT:
A system and method are described for establishing a common operating frequency and phase for the lasers in a two-dimensional array, each of which has an actual frequency which deviates from a common nominal frequency. A waveguide structure is placed in the path of the beams emitted from the various lasers, and a plurality of optical gratings are provided in the waveguide in alignment with the laser beams to deflect portions of the beams into propagation along the waveguide and into cross-coupling with the other lasers in the array. The periodic gratings are characterized by grating periods substantially equal to .lambda.
.sub.1, and the thickness of the waveguide core is at least equal to approximately .lambda./(4.sqroot.n.sub.2.sup.2 -n.sub.3.sup.2), where .lambda. is the wavelength of the guided mode, n.sub.1 is the effective refractive index for the guided mode, and n.sub.2 and n.sub.3 are the refractive indices for the waveguide core and substrate, respectively. Two-dimensional coupling is achieved either by waveguide coupling in one direction and evanescent coupling in the other direction, or by a pair of gratings for each laser beam at angles to each other to produce waveguide coupling in both directions.
REFERENCES:
patent: 3996492 (1976-12-01), McGroddy
patent: 3996528 (1976-12-01), Blum et al.
patent: 4163953 (1979-08-01), Springthorpe et al.
Davie James W.
Deinken John J.
Hamann H. Fredrick
Malin Craig O.
Rockwell International Corporation
LandOfFree
Frequency and phase locking method for laser array does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency and phase locking method for laser array, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency and phase locking method for laser array will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-924568