期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 16, 期 3, 页码 747-749出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2004.823686
关键词
cavity length; continuous wave (CW); high-temperature operation; mid-infrared; quantum-cascade lasers (QCLs); quantum wells
High-temperature high-power continuous-wave (CW) operation of high-reflectivity-coated 12-mum-wide quantum-cascade lasers emitting at lambda = 6 mum with a thick electroplated An top contact layer is reported for different cavity lengths. For a 3-mm-long laser, the CW optical output powers of 381 mW at 293 K and 22 mW at maximum operating temperature of 333 K (60 degreesC) are achieved with threshold current densities of 1.93 and 3.09 kA/cm(2), respectively. At 298 K, the same cavity gives a maximum wall plug efficiency of 3.17% at 1.07 A. An even higher CW optical output power of 424 mW at 293 K is obtained for a 4-mm-long laser and the device also operates up to 332 K with an output power of 14 mW. Thermal resistance is also analyzed at threshold as a function of cavity length.
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