Title :
CW operation of 1.55-μm bipolar cascade laser with record differential efficiency, low threshold, and 50-/spl Omega/ matching
Author :
Getty, Jonathan T. ; Skogen, Erik J. ; Johansson, Leif A. ; Coldren, Larry A.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of California, Santa Barbara, CA, USA
Abstract :
By electrically segmenting an InP ridge laser and series-connecting the segments, we have created the first highly scalable bipolar cascade lasers. We report room-temperature continuous-wave operation of 12-stage lasers with a record 390% differential efficiency and 2.8-mA threshold, as well as three-stage lasers with 50-/spl Omega/ input impedance and 118% efficiency.
Keywords :
III-V semiconductors; gallium arsenide; impedance matching; indium compounds; laser transitions; quantum cascade lasers; ridge waveguides; waveguide lasers; 1.55 micron; 12-stage lasers; 2.8 mA; 50 ohm; 50-W matching; CW operation; InP ridge laser; InP-InGaAsP; bipolar cascade laser; electrical segmentation; highly scalable bipolar cascade lasers; input impedance; low threshold; record differential efficiency; room-temperature continuous-wave operation; series-connection; three-stage lasers; Diodes; Ion implantation; Particle beam optics; Quantum cascade lasers; Quantum well lasers; Radiofrequency amplifiers; Semiconductor lasers; Semiconductor optical amplifiers; Stimulated emission; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818646
