Title :
A circular beam spot and low threshold current laser diode with reverse-v-shape layer
Author :
Takeshita, Tatsuya ; Shibata, Yasuo ; Ito, Toshio ; Sakai, Yoshihisa ; Okamoto, Minoru ; Tohmori, Yuichi
Author_Institution :
NTT Photonics Labs., Kanagawa, Japan
fDate :
12/1/2001 12:00:00 AM
Abstract :
A laser with a reverse-V-shape layer exhibits a circular beam spot and low threshold current. The beam aspect ratio of the reverse-V-shape laser is clarified to be insensitive to reverse-V-shape width. The reverse-V-shape layer consists of a strained active layer and a passive guide layer, which leads to a low threshold current. The reverse-V-shape laser is attractive as an optical source for optical-communication and information systems
Keywords :
laser beams; semiconductor lasers; waveguide lasers; beam aspect ratio; circular beam spot; low threshold current; low threshold current laser diode; optical communication systems; optical source; passive guide layer; reverse-V-shape laser; reverse-V-shape width; reverse-v-shape layer; strained active layer; Diode lasers; Fiber lasers; Laser beams; Laser modes; Optical fiber devices; Semiconductor lasers; Shape; Surface emitting lasers; Threshold current; Vertical cavity surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
