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- W4306252731 abstract "In this article, we report a high power quantum cascade laser (QCL) at λ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mo>∼<!-- ∼ --></mml:mo> </mml:math> 7.4 µm with a broad tuning range. By carefully designing and optimizing the active region and waveguide structure, a continuous-wave (CW) output power up to 1.36 W and 0.5 W is achieved at 293 K and 373 K which shows the excellent temperature stability. A high wall-plug efficiency (WPE) of 8% and 13.6% in CW and pulsed mode at 293 K are demonstrated. The laser shows a characteristic temperature T 0 of 224 K and T 1 of 381 K over a temperature range from 283 K to 373 K. In addition, a far field of pure zero order transverse mode and a fairly wide external cavity (EC) tuning range (280 cm -1 ) from 6.54 µm to 8 µm are achieved in pulsed operation. In addition, an EC single mode output power of 226 mW is obtained under CW operation at 293K." @default.
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- W4306252731 date "2022-10-19" @default.
- W4306252731 modified "2023-10-14" @default.
- W4306252731 title "Broad tuning range, high power quantum cascade laser at λ ∼ 7.4 µm" @default.
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- W4306252731 doi "https://doi.org/10.1364/oe.472942" @default.
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