Title :
High-coupling efficiency of a 1.3-μm spot-size converter integrated laser diode with pn-buried heterostructure for high-temperature operation
Author :
Suzaki, Yasumasa ; Mitomi, Osamu ; Kondo, Yasuhiro ; Sakai, Yoshihisa ; Kawaguchi, Yoshihisa ; Tohmori, Yuichi ; Kadota, Yoshiaki ; Yamamoto, Mitsuo
Author_Institution :
NTT Opto-Electron. Labs., Kanagawa, Japan
fDate :
8/1/1997 12:00:00 AM
Abstract :
We propose a novel design concept for low-loss coupling with high laser performance in a spot-size converter integrated laser diode (SS-LD) with a pn-buried heterostructure (pn-BH) and demonstrate both the good coupling efficiency and high laser performance. We clarify that a high position and a high doping concentration of an n-InP current blocking layer in the pn-BH are favorable for high-coupling efficiency with a single-mode fiber by a two-dimensional (2-D) finite-element method-based calculation. By using the proposed concept, low-loss coupling of 1.6 dB with a low threshold current of 5.5 mA at room temperature and 19.6 mA even at 85°C was achieved experimentally
Keywords :
finite element analysis; infrared sources; laser transitions; optical couplers; quantum well lasers; μm spot-size converter integrated laser diode; 1.3 mum; 19.6 mA; 2D finite-element method-based calculation; 5.5 mA; 85 C; InP; good coupling efficiency; high doping concentration; high laser performance; high-coupling efficiency; high-temperature operation; low threshold current; low-loss coupling; n-InP current blocking layer; pn-buried heterostructure; room temperature; single-mode fiber; spot-size converter integrated laser diode; Coupling circuits; Diode lasers; Doping; Fiber lasers; Optical coupling; Optical fiber networks; Optical fibers; Optical refraction; Optical variables control; Optical waveguides;
Journal_Title :
Lightwave Technology, Journal of
