Single Mode 2 μm GaSb Based Laterally Coupled Distributed Feedback Quantum-Well Laser Diodes with Metal Grating

【摘要】 Room-temperature operation of a GaSb based laterally coupled distributed feedback quantum-well laser diode emitting at 2 μm is demonstrated.The device exhibits single longitudinal mode characteristic as a result of the first order Cr-Bragg gratings alongside the narrow ridge waveguide.We design the laser structure to obtain a critical coupling condition corresponding to a coupling coefficient of 12cm^-1.For a 1-mm-long uncoated laser diode with a 3-μm-wide stripe,a single mode output spectrum with side mode suppression ratio as high as 28.5 dB is achieved,and the maximum single mode continuous-wave output power is about 11 mW at room temperature.更多还原

【Abstract】 Room-temperature operation of a GaSb based laterally coupled distributed feedback quantum-well laser diode emitting at 2 μm is demonstrated.The device exhibits single longitudinal mode characteristic as a result of the first order Cr-Bragg gratings alongside the narrow ridge waveguide.We design the laser structure to obtain a critical coupling condition corresponding to a coupling coefficient of 12cm^-1.For a 1-mm-long uncoated laser diode with a 3-μm-wide stripe,a single mode output spectrum with side mode suppression ratio as high as 28.5 dB is achieved,and the maximum single mode continuous-wave output power is about 11 mW at room temperature.更多还原