公开(公告)号：JPH11177491A

公开(公告)日：1999-07-02

申请号：JP26885098

申请日：1998-09-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CARIDI ELISA A ,  STARK JASON BLAIN

IPC: H04B10/00 ,  H04B10/02 ,  H04B10/18 ,  H04H20/69 ,  H04J14/00 ,  H04J14/02 ,  H04J14/08 ,  H04N7/22

Abstract: PROBLEM TO BE SOLVED: To easily generate a delay pulse and to supply a common broadcast channel to plural WDM receivers by respectively giving a pulse light source to a distribute delay line and M-th delay lines provided with (M-1) pieces of time slots by which an M-th delay line is delayed by M-1 bits. SOLUTION: A short wideband pulse generated in a pulse light source 101 is transmitted to a 1×N (N=M+1) power splitter 103, and N pieces of copy pulses are generated. One of the copy pulses is chirp-fluctuated in a distributed delay line 115 and a beam o light provided with a wavelength which is changes linearly with time is transmitted. Other (N-1) pieces of copy pulses are continuously and respectively delayed by one bit period. After that, whole delay line outputs are coupled in an (N×N) power coupler 131, modulated by a modulator 143 and outputted. As a result, the N-number copy pulses consisting of chirp- fluctuated light with an intermittent period, which are necessary for the plural WDN receivers, are coupled with succeeding (N-1) pieces of wideband light pulses to be outputted.