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在210K的温度下,5.2μm的量子级联激光器在CW运转下输出光功率高于5mW,利用温差电致冷器件即可达到此温度.将激光器放置于铜块上,在210K时,它的热阻抗约为10K/W.使用实验测量得到的T0=136K,J0=535A/cm2,Vop=8.1V和上述的热阻值,理论上可以达到激光运转的最高温度是212K,与实验结果相一致.通过热学模拟显示,由提高激光器的设计和散热,可使热阻抗降低到8.8K/W,从而使激光器运转温度提高到230K.
At a temperature of 210K, a 5.2μm quantum cascade laser with an output optical power higher than 5mW under CW operation can be reached using a thermoelectric cooling device. The laser is placed on a copper block and at 210K its The thermal resistance is about 10K / W. Using experimental measurements T0 = 136K, J0 = 535A / cm2, Vop = 8.1V and the above thermal resistance, the maximum theoretical temperature of the laser can be reached 212K, and the experimental results phase The thermal simulation shows that by increasing the design and heat dissipation of the laser, the thermal impedance can be reduced to 8.8K / W and the laser operating temperature can be raised to 230K.