LEAKY MODE VERTICAL-CAVITY LASERS USING CAVITY RESONANCE MODIFICATION

Singlemode operation of selectively oxidised monolithic vertical cavit y laser diodes is demonstrated using optical antiguiding induced by ca vity resonance modifications. A higher refractive index surrounding th e laser cavity is accomplished by increasing the optical cavity length in this region to form leaky-mode lasers. The monolithic antiguiding lasers are fabricated using an etch and regrowth process of the top se miconductor distributed Bragg reflector mirror. The leaky-mode vertica l cavity lasers exhibit single transverse mode operation up to injecti on currents greater than 13 times the threshold current.