公开(公告)号：JPH1065623A

公开(公告)日：1998-03-06

申请号：JP18328097

申请日：1997-06-25

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： RICCARDO CALVANI ,  RENATO CAPONI

IPC: H04B10/00 ,  G02F1/365 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04B10/18

Abstract: PROBLEM TO BE SOLVED: To obtain a pulse so that the product of band width with a duration time exists within a requiured limit by utilizing peak power as a control parameter. SOLUTION: A pulse source includes a color center laser 1 and the pulse discharged by the laser 1 is transmitted to the inside of a distribution shift optical fiber 4 with certain length. A coupler 11 transmits a part of pulse power to a power meter 12 or to the same kind of device for measuring the peak power of the pulse. The power meter 12 is connected to a computer 13. The computer 13 controls a required peak power variation and receives information about the duration time of the pulse which is outputted from the device. The information is given by a self correlator 8 and the self correlator 8 receives a part of output power with another coupler 10. Conventional fibers 5a and 5b are arranged along a pulse path. The whole length of the fibers is the one for compensating a phase effect as the function of a frequency.