Title :
Mode-Controlled Tapered Lasers Based on Quantum Dots
Author :
Weinmann, Pia ; Zimmermann, Christian ; Schlereth, Thomas Walter ; Schneider, Christian ; Höfling, Sven ; Kamp, Martin ; Forchel, Alfred
Author_Institution :
Tech. Phys., Univ. Wurzburg, Wurzburg
Abstract :
Wavelength control of tapered quantum dot (QD) lasers was achieved by adding a distributed Bragg reflector as wavelength-selective element to the devices. The Bragg wavelength of around 920 nm is matched to the gain of the single layer of InGaAs QDs that is used as active material. Devices with 1.4-mm-long tapers have reached output powers of over 1 W, and over 2 W were obtained from lasers with 3-mm-long tapers. The emission of the devices is restricted to a very narrow spectral range, with side-mode suppression ratios of over 40 dB.
Keywords :
III-V semiconductors; distributed Bragg reflector lasers; gallium arsenide; indium compounds; laser beams; laser modes; quantum dot lasers; semiconductor quantum dots; InGaAs; active material; distributed Bragg reflector; mode-controlled tapered quantum dot laser; narrow spectral range; side-mode suppression ratio; size 1.4 mm; size 3 mm; wavelength 920 nm; wavelength control; wavelength-selective element; Continuous-wave (CW) lasers; distributed Bragg reflector (DBR) lasers; quantum dots (QDs); semiconductor lasers;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2008.2010874
