公开(公告)号：JP2001156392A

公开(公告)日：2001-06-08

申请号：JP2000348655

申请日：2000-11-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JAMBUNATHAN RAM ,  ROBERTSON ALEXANDER ,  ENG LARS E ,  KAMATH KISHORE K ,  WILT DANIEL PAUL

IPC: H01S5/10 ,  H01S5/12 ,  H01S5/343

Abstract: PROBLEM TO BE SOLVED: To provide a distribution feedback type laser having a low threshold value in which low temperature performance is improved. SOLUTION: Probability of laser oscillation occurring in the vicinity of the short wavelength side of a stop band is increased using an active layer 18, a spacer layer 16 and a loss grating layer 14 and the effect of negative gain inclination occurring at the time of detuning of a DFB laser in the positive direction is canceled thus obtaining a method for fabricating a DFB laser having an improved side mode suppression ratio(SMSR) at low temperature.