Circular grating lasers

Details Circular grating lasers Circular grating lasers

1993-11-29

1995-09-05

Bovernick, Rodney B.

Coherent light generators

Particular active media

Semiconductor

372 44, 372 46, H01S 319

Patent

active

054485819

ABSTRACT:
A surface emitting, circular grating, semiconductor laser. Gain is generated by injecting current into an active, annular mesa region which surrounds a central, circular region having a circular grating for surface emission. The annular mesa region is surrounded by an outer annular region in which is etched a first order grating for creating feedback. Methods of fabricating the circular grating laser are also described.

REFERENCES:
patent: 4743083 (1988-05-01), Schimpe
patent: 5052016 (1991-09-01), Mahbobzadeh et al.
patent: 5164956 (1992-11-01), Lang
"Binary phase Fresnel lenses for generation of two-dimensional beam arrays", Rastani et al., Applied Optics, vol. 30, No. 11, 10 Apr. 1991, pp. 1347-1354.
"GaAs/AlGaAs Grating Surface-Emitting Diode Lasers on Si Substrates", Connolly et al, Electronics Letters, vol. 25, No. 14, Jul. 6 1989, pp. 901-902.
"Optically Pumped Surface-Emitting DFB GaInAsP/InP Lasers with Circular Grating", Wu et al, Electronics Letters, vol. 27, No. 20, Sep. 26, 1991, pp. 1819-1820.

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