High-power 1.55 /spl mu/m AlGaInAs-InP DBR tapered laser

Summary form only given. Several applications such as free space communication, laser radar, and night vision require a single mode, single-frequency laser with an optical power of /spl sim/1 W and a wavelength of 1.55 /spl mu/m. Recently, high power InGaAsP-InP tapered lasers were obtained at this wavelength with a single lateral mode, but still with numerous longitudinal modes. Here, we report on a high-power tapered AlGaInAs-InP distributed Bragg reflector (DBR) tapered single frequency laser.