Title :
Improved temperature performance of 1.31-μm quantum dot lasers by optimized ridge waveguide design
Author :
Ray, Samit K. ; Groom, K.M. ; Hogg, R.A. ; Liu, H.Y. ; Hopkinson, M. ; Badcock, T. ; Mowbray, D.J. ; Skolnick, M.S.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK
Abstract :
We demonstrate the importance of the fabricated device structure for the external differential efficiency, threshold current density, and maximum operating temperature for ground state operation of a 1.31-μm quantum dot laser. The introduction of a shallow ridge etch design and selective electroplating of the gold bondpads is demonstrated to offer improved performance in comparison to a deep ridge etch design with thinner evaporated gold bondpads.
Keywords :
current density; electroplating; etching; gold; laser transitions; optical design techniques; quantum dot lasers; ridge waveguides; waveguide lasers; 1.31 mum; Au; external differential efficiency; gold bondpads electroplating; quantum dot lasers; ridge etch design; ridge waveguide design; threshold current density; Bonding; Design optimization; Etching; Gold; Land surface temperature; Optical design; Quantum dot lasers; Stationary state; Threshold current; Waveguide lasers; Dot-in-well (DWELL); quantum dots (QDs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.853530
