公开(公告)号：EP1577687A4

公开(公告)日：2006-06-14

申请号：EP03786309

申请日：2003-12-25

Applicant: NIPPON TELEGRAPH & TELEPHONE

Inventor： HASHIMOTO TOSHIKAZU ,  OGAWA IKUO ,  KITAGAWA TAKESHI ,  SUZUKI SENICHI ,  YANAGISAWA MASAHIRO ,  SHIBATA TOMOHIRO ,  KOUTOKU MASAKI ,  TAKAHASHI HIROSHI ,  NAGASE RYOU ,  KOBAYASHI MASARU ,  ASAKAWA SHUICHIRO ,  ABE YOSHITERU ,  KITOH TSUTOMU ,  OHYAMA TAKAHARU

IPC: G02B6/13 ,  G02B6/12 ,  G02B6/122 ,  G02B6/34

CPC classification number: G02B6/12009 ,  G02B6/12007

Abstract: An input port and an output port are provided to a wave transmission medium. Field distribution 1 of a propagated light (forward propagated light) that has entered through the input port is determined by numerical calculation. Field distribution 2 of a phase conjugate light (reversely propagated light) is also determined by numerical calculation. The phase conjugate light is such that the output field expected when an optical signal that has entered through the input port is outputted from the output port is propagated reversely from the output port. From field distributions 1, 2, the spatial distribution of the index of refraction in a medium can be so determined that there is no phase difference between the propagated light and the reversely propagated light at each point (x, z).