Vertical cavity surface emitting laser array with integrated photodetector

摘要

A vertical cavity surface emitting laser array with an integrated PIN photodiode. The PIN photodiode includes a first region of a first doped material, a second region of an undoped material and a third region composed of an n-doped stack of distributed Bragg reflectors. The vertical cavity surface emitting laser includes the n-type stack of distributed Bragg reflectors, an active, and a p-type stack of distributed Bragg reflectors so as to define an optical pathway through which light is generated and passes. The integrated device allows for automatic power control of each of the individual devices forming the array by sequentially scanning the individual devices and generating feedback signals.