公开(公告)号：JP2000124529A

公开(公告)日：2000-04-28

申请号：JP15108898

申请日：1998-06-01

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SRIVASTAVA ATUL K ,  SULHOFF JAMES W ,  SUN YAN ,  ZYSKIND JOHN L

IPC: H01S3/10 ,  H01S3/06 ,  H01S3/067

Abstract: PROBLEM TO BE SOLVED: To realize a wide band light amplifier having uniform gain spectra. SOLUTION: A wise band amplifier 200 has at least two sections of a first (common) section 202 and a second (branch) section 204. After a light signal enters the common section 202, the light signal is branched into two (more than two) independent subbands. These independent subbands are respectively sent to the separate branches of the branch section 204 and after the subbands are amplified there, they are recombined to turn into an output signal. In concrete terms, the signal is branched into a short-wavelength (S) band, an intermediate-wavelength (M) band and a long-wavelength (L) band. These bands respectively correspond to each branch of the section 204. In am embodiment, the S band is in a range of 1510 to 1525 nm, the M band is in a range of 1525 to 1565 nm and the L band is in a range of 1565 to 1610 nm. It is also possible that one branch or a plurality of branches is or are further made to branch to realize a hybrid structure.