High power, broad tuning, double-stack quantum cascade laser at λ ～6.9 μm

作者：Niu, Shan; Lu, Quanyong; Sun, Yongqiang; Ma, Yu; Lu, Xiyu; Liu, Fengqi; Zhang, Jinchuan^*; Zhuo, Ning

来源：Optical Materials Express, 2023, 13(7): 1994-2002.

DOI：10.1364/OME.492982

• CONTINUOUS-WAVE
• SEMICONDUCTOR-LASER
• GAIN

Broadband double-stack quantum cascade lasers with strain-balanced In0.60Ga0.40As/In0.43Al0.57As and In0.60Ga0.40As/In0.41Al0.59As emitting at a wavelength of 6.9 pm are reported. The double-stack design is achieved by changing the beam flux of the aluminum effusion cell. The maximum continuous-wave power at room temperature (293 K) is 1.07 W. Tuning ranges of 195 and 104 cm-1 in pulsed and continuous-wave modes, respectively, are obtained using an external-cavity measurement system. The continuous-wave power of the external-cavity mode exceeds 110 mW, and is thus suitable for the detection of some functional groups.

• 单位
  中国科学院; 中国科学院大学