Title :
Type-II interband cascade lasers in the 4.3-4.7-μm wavelength region
Author :
Yang, R.Q. ; Hill, C.J. ; Baohua Yang ; Wong, C.M.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
fDate :
4/1/2004 12:00:00 AM
Abstract :
Operation of type-II interband cascade lasers in the 4.3-4.7-μm wavelength region has been demonstrated at temperatures up to 240 K in pulsed mode. These lasers fabricated with 150-μm-wide mesa stripes operated in continuous-wave (CW) mode up to a maximum temperature of 110 K, with an output power exceeding 30 mW/f and a threshold current density of about 41 A/cm2 at 90 K. The maximum CW operation temperature of 110 K is largely limited by the high specific thermal resistance of the 150-μm-wide broad area lasers. A 20-μm-wide mesa stripe laser was able to operate in CW mode at higher temperatures up to 125 K as a result of the reduced specific thermal resistance of a smaller device.
Keywords :
high-speed optical techniques; infrared spectra; laser modes; optical fabrication; quantum cascade lasers; semiconductor lasers; semiconductor superlattices; thermal resistance; 110 K; 20 mum; 4.3 to 4.7 mum; 90 K; CW operation temperature; broad area lasers; diode lasers; mesa stripe laser; midinfrared region; pulsed mode; quantum-well lasers; semiconductor superlattices; specific thermal resistance; threshold current density; type-II interband cascade lasers; Laser excitation; Laser modes; Optical pulses; Pump lasers; Quantum cascade lasers; Quantum well lasers; Semiconductor lasers; Temperature; Thermal resistance; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.824947
