High brightness angled cavity quantum cascade lasers

作者：Heydari D; Bai Y; Bandyopadhyay N; Slivken S; Razeghi M^*

来源：Applied Physics Letters, 2015, 106(9): 091105.

DOI：10.1063/1.4914477

A quantum cascade laser (QCL) with an output power of 203W is demonstrated in pulsed mode at 283K with an angled cavity. The device has a ridge width of 300 mu m, a cavity length of 5.8 mm, and a tilt angle of 12 degrees. The back facet is high reflection coated, and the front facet is anti-reflection coated. The emitting wavelength is around 4.8 mu m. In distinct contrast to a straight cavity broad area QCL, the lateral far field is single lobed with a divergence angle of only 3 degrees. An ultrahigh brightness value of 156 MW cm(-2) sr(-1) is obtained, which marks the brightest QCL to date.

• 出版日期2015-3-2
• 单位西北大学