Diffraction-limited emission from a diode laser array in an apertured graded-index lens external cavity

Chang-Hasnain, C.; Welch, D. F.; Scifres, D. R.; Whinnery, J. R.; Dienes, A.; Burnham, R. D.
September 1986
Applied Physics Letters;9/15/1986, Vol. 49 Issue 11, p614
Academic Journal
A gain-guided coupled-stripe GaAs/GaAlAs diode laser array in an external cavity configuration consisting of a graded refractive index lens and a 25-μm stripe apertured mirror was studied. Output power of almost 500 mW was obtained from the cavity under pulsed operation. A centered, single-lobed far-field radiation pattern which did not steer with the drive current was observed up to 4.1Ith. At 2Ith approximately 94% of the 102-mW output power is contained in the 0.8° full width half-maximum central lobe.


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