LASER DEVICES

摘要

This invention concerns the use of engineered deep-etch air/semiconductor Bragg reflector gratings in order to control the spectral and spatial emission in short-wavelength laser diodes. The technique consists of introducing a high-order deep-etch distributed reflector of controlled depth, pitch and position into the laser cavity, in order to selectively enhance the modal reflectivity of one, or a selected number, or lasing modes.