Split contact phased array lasers

Details Split contact phased array lasers Split contact phased array lasers

1987-08-06

1989-01-17

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Scanning

372 46, 372 50, 372 96, H01S 310

Patent

active

047992239

ABSTRACT:
A split contact phased array laser comprising a plurality of parallel emitters under phase locked operation and productive of an output beam having a preferred emission wavelength and preferred far field mode of operation. The charge distribution profile in the laser is changed to cause the output beam to deflect and scan in the far field. The improvement in the laser is the provision of at least three independently current pumped segments formed transversely of said emitters wherein at least one of the segments is current pumped above threshold level sufficient to primarily determine the emission wavelength and mode of operation of the laser while the current supplied to the remaining segments is below this level and is varied relative to one another to cause the output beam to deflect and scan in the far field without substantial change to the emission wavelength and mode of operation. This is because the charge density is essentially clamped under the one dominant contact segment and is only minimally influenced by further changes in the pumping current.

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patent: 4719634 (1988-01-01), Streifer et al.
Donald R. Scifres et al., "Lateral Beam Collimation of a Phased Array Semiconductor Laser", Applied Physics Letters, vol. 41(7), pp. 614-616, Oct. 1, 1982.

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