Room-temperature continuous-wave operation of quantum-cascade lasers at λ∼4μm
- 23 January 2006
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (4)
- https://doi.org/10.1063/1.2167394
Abstract
High-power cw λ∼4μm quantum-cascade lasers (QCLs) are demonstrated. The effect of different cavity length and laser die bonding is also investigated. For a high-reflectivity-coated 11-μm-wide and 4-mm-long epilayer-down bonded QCL, cw output powers as high as 1.6W at 80K and 160mW at 298K are obtained, and the cw operation is achieved up to 313K with 12mW. The laser exhibits a threshold current density of 1.96kA∕cm2, a slope efficiency of 737mW∕A, and a maximum wall-plug efficiency of 0.9% under cw mode at 298K. In pulsed mode, a maximum average power of 552mW at 298K is achieved at 45% duty cycle and a characteristic temperature is 176K from 80to393K.Keywords
This publication has 9 references indexed in Scilit:
- High-temperature and low-threshold midinfrared interband cascade lasersApplied Physics Letters, 2005
- Short wavelength (/spl lambda//spl sim/4.3 /spl mu/m) high-performance continuous-wave quantum-cascade lasersIEEE Photonics Technology Letters, 2005
- High-power CW quantum cascade lasers: How short can we go?Published by SPIE-Intl Soc Optical Eng ,2005
- Continuous-wave operation of λ∼4.8μm quantum-cascade lasersat room temperatureApplied Physics Letters, 2004
- Above room temperature operation of short wavelength (λ=3.8μm) strain-compensated In0.73Ga0.27As–AlAs quantum-cascade lasersApplied Physics Letters, 2004
- High-Power Continuous-Wave Operation of Quantum-Cascade Lasers up to 60$^circ$CIEEE Photonics Technology Letters, 2004
- Midinfrared “W” diode lasers with improved electrical characteristicsApplied Physics Letters, 2003
- Continuous Wave Operation of a Mid-Infrared Semiconductor Laser at Room TemperatureScience, 2002
- Short wavelength (λ∼3.4 μm) quantum cascade laser based on strained compensated InGaAs/AlInAsApplied Physics Letters, 1998