Monolithic integration of a lens inside a diode-laser cavity for beam convergence

Mukai, S.; Yajima, H.; Tsunekawa, Y.; Takabe, Y.
August 1985
Applied Physics Letters;8/1/1985, Vol. 47 Issue 3, p188
Academic Journal
A lens is monolithically integrated inside a diode-laser cavity for the first time. The lens is formed on one end of the mesa-type waveguide by making the equivalent refractive index lower toward the edges of the mesa. The lens makes the phase front of the lasing mode concave at the facet. Correspondingly, a (laterally) converging laser beam is realized without using any separate optical components. A numeric analysis of the beam convergence is also given.


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