Title :
Low-Threshold and High-Efficiency Operation of Distributed Reflector Laser With Wirelike Active Regions
Author :
Shindo, Takahiko ; Lee, SeungHun ; Takahashi, Daisuke ; Tajima, Noriaki ; Nishiyama, Nobuhiko ; Arai, Shigehisa
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
A high differential quantum efficiency of about 50% from the front facet and low threshold current operation have been achieved. By modifying the doping profile in 1.55-mum distributed reflector lasers, waveguide loss was reduced from 6-7 to 4 cm-1 . Injection currents of 4.2 and 3.6 mA were obtained to achieve a 1-mW output power for lasers with uniform and phase-shifted grating structures, respectively.
Keywords :
distributed Bragg reflector lasers; distributed feedback lasers; doping; optical communication equipment; current 3.6 mA; current 4.2 mA; distributed reflector laser; doping profile; low threshold current; phase shifted grating; power 1 mW; wavelength 1.55 mum; wirelike active regions; Distributed reflector (DR) laser; low power consumption; semiconductor laser;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2027713
