Title :
Room-temperature 2.95 μm quantum cascade laser sources based on intra-cavity frequency doubling
Author :
Jang, Minsoo ; Wang, Xiongfei ; Adams, R.W. ; Troccoli, Mariano ; Belkin, Mikhail A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
Reported are the design and performance of GaInAs/AlInAs/InP quantum cascade laser sources based on intra-cavity second-harmonic generation providing an output at 2.95 m wavelength. To produce frequency doubling, devices contain a passive heterostructure tailored for giant optical nonlinearity integrated on top of an active region and patterned for quasi-phase matching. The sources have a threshold current density of 2.2 kA/cm2 and provide approximately 35 W of second-harmonic output at room temperature. The second-harmonic conversion efficiency is approximately 75 W/W2.
Keywords :
III-V semiconductors; aluminium compounds; gallium compounds; indium compounds; optical harmonic generation; quantum cascade lasers; GaInAs-AlInAs-InP; giant optical nonlinearity; intracavity frequency doubling; intracavity second-harmonic generation; passive heterostructure; quantum cascade laser sources; quasiphase matching; wavelength 2.95 mum;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.0753
