论文信息 - High-Power Operation of Uncoated Strain-Compensated Quantum Cascade Lasers at 4.8 μm

High-Power Operation of Uncoated Strain-Compensated Quantum Cascade Lasers at 4.8 μm

High-power operation of uncoated 22-mu m-wide quantum cascade lasers (QCLs) emitting at lambda approximate to 4.8 mu m is reported. The emitting region of the QCL structure consists of a 30-period strain-compensated In0.68Ga0.32As/In0.37Al0.63As superlattice. For a 4-mm-long laser in pulsed mode, a peak output power is achieved in excess of 2240mW per facet at 81K with a threshold current density of 0.64kA/cm(2). The effects of varying the cavity lengths from 1 to 4mm on the performances of the QCLs are analysed in detail and the low waveguide loss of only about 1.4 cm(-1) is extracted.

Wang Zhanguo | Liu Fengqi | Liu Junqi | Li Lu | Shao Ye

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