High-power continuous-wave operation of a 6 μm quantum-cascade laser at room temperature

Yu, J.S.; Slivken, S.; Evans, A.; Doris, L.; Razeghi, M.
September 2003
Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2503
Academic Journal
We report continuous-wave (cw) operation of quantum-cascade lasers (λ=6 μm) using a thick electroplated Au top contact layer and epilayer-up bonding on a copper heat sink up to a temperature of 308 K (35 °C). The high cw optical output powers of 132 mW at 293 K and 21 mW at 308 K are achieved with threshold current densities of 2.29 and 2.91 kA/cm[sup 2], respectively, for a high-reflectivity-coated 15 μm wide and 2 mm long laser. © 2003 American Institute of Physics.


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