Wide-area lasers including anti-guiding areas for high-order lateral mode suppression

摘要

The wide area laser diode 10 is configured to include an anti-guiding layer 30, 60 located outside the active area of the device. The anti-guiding layer is formed of a high refractive index material that serves to separate unwanted, higher order lateral modes (which contribute to thermal lens problems) from the lower order mode output beam of the laser diode output signal. The anti-guiding layer is formed using a single epitaxial growth step before or after the steps used to grow the epitaxial layers that form the laser diode itself, and thus the specific process steps used to fabricate the laser diode itself Lt; RTI ID = 0.0 unnecessary / RTI