Based on a matched Ga 0.47 In 0.53 As/Al 0.48 In 0.52 As heteropair, we have developed a quantum cascade laser emitting at a wavelength of 7.4 μm. The chosen heterostructure with a relatively large number of quantum wells and barriers represents two mini-bands separated by a mini-gap with a localised doublet level near the upper mini-band, which provides a wide emission band (≈100 cm -1 ). In a pulse regime, the maximal laser operation temperature is 371 K. Such a high temperature is explained by two factors: a large energy of the transfer from the doublet to the upper mini-band and a large volt defect. The characteristic temperatures T 0 are found, which are equal to 170 K for low (less than 300 K) temperatures and 270 K for the range of 300 – 370 K. In addition, optical cavity losses are determined to be 2.5 and 7.7 cm -1 at temperatures of 80 and 254 K, respectively. The pulse power is 0.3 W at 80 K and 0.05 W at 2...

中文翻译：

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具有束缚到准连续光跃迁的量子级联激光器，温度高达371 K

基于匹配的Ga 0.47 In 0.53 As / Al 0.48 In 0.52 As异对，我们开发了一种量子级联激光器，其发射的波长为7.4μm。所选择的具有相对较多的量子阱和势垒的异质结构代表两个微型带，这些微型带由一个微型间隙分隔开，并且在上部微型带附近具有局部双峰能级，从而提供了较宽的发射带（≈100cm -1）。在脉冲状态下，最高激光工作温度为371K。如此高的温度可以通过两个因素来解释：从双峰到上微带的转移能量很大，电压缺陷也很大。发现特征温度T 0，对于低温（低于300 K），等于170 K；对于300 – 370 K范围，等于270K。此外，光学腔损耗确定为2.5和7。在80和254 K的温度下分别为7 cm -1。脉冲功率在80 K时为0.3 W，在2 K ...时为0.05 W