Variable optical filter and optical transmission system using same, and method of controlling variable optical filter | Patent Publication Number 20040135172

US 20040135172 A1
Patent NumberUS 06978064 B2
Application Number10705220
Filled DateNov 12, 2003
Priority DateNov 12, 2003
Publication DateJul 15, 2004
Original AssigneeFujitsu Limited
Current AssigneeFujitsu Limited
Inventor/ApplicantsHiroshi Onaka
Setsuo Yoshida
Hiroshi Onaka
Setsuo Yoshida
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