公开(公告)号：EP1243055A2

公开(公告)日：2002-09-25

申请号：EP00990008.5

申请日：2000-12-20

申请人： Optical Technologies Italia S.p.A.

发明人： BALSAMO, Stefano ,  GHISLOTTI, Giorgio ,  MORASCA, Salvatore ,  TREZZI, Fiorenzo

IPC分类号： H01S5/10 ,  H01S5/22

CPC分类号： H01S5/10 ,  H01S5/0425 ,  H01S5/1014 ,  H01S5/1064 ,  H01S5/2036 ,  H01S5/22 ,  H01S2301/18

摘要： A semiconductor ridge laser for coupling to a single-mode optical fiber has a ridge with a narrow parallel region, a diverging region, and then a wide parallel region that is adjacent to an output facet. A pump region for the laser may be less than the entire area of the ridge and have a 'T' shape. Preferably, the ridge has a depth of about 350 to 550 nm and the narrow parallel region has a length of more than 0.4 times the overall length of the ridge. The wide parallel region at the output enables the laser to obtain low thermal resistance, which leads to a low operating temperature, a low power density in the laser cavity, and low astigmatism.