Very high average power at room temperature from λapprox. 5.9-μm quantum-cascade lasers

Yu, J. S.; Slivken, S.; Evans, A.; David, J.; Razeghi, M.
May 2003
Applied Physics Letters;5/19/2003, Vol. 82 Issue 20, p3397
Academic Journal
We report a very high average output power at room temperature for quantum-cascade lasers emitting at ∼ ≈ 5.9 µm. For high-reflectivity-coated 2-mm-long cavities, a low threshold current density of 1.7 kA/cm² was obtained at room temperature. From 300 to 400 K, the characteristic temperature (T[sub 0]) was 198 K. A maximum average output power of 0.67 W was achieved. In addition, 0.56 W average output power was observed at a duty cycle of 56%.


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