Title:
CODE CONVERSION DEVICE
Document Type and Number:
Japanese Patent JP2005352197
Kind Code:
A
Abstract:
To make waveform deterioration due to a pattern effect not occur by converting a transmitted intensity modulating code to a Manchester code and inputting it to an optical limiter amplifier.
A wavelength conversion element is constructed by combining four 2×2 wavelength couplers 9-12 and two semiconductor optical amplifiers 101, 102 and has four input ports 1-4 and four output ports 5-8. A wavelength filter 103 to transmit 1,545 nm wavelength light and to prevent 1,555 nm wavelength light is inserted between the semiconductor optical amplifier 101 and the wavelength couplers 9-12.
Inventors:
ITO TOSHIO
SATOU RIEKO
AKATSU YUJI
SATOU RIEKO
AKATSU YUJI
Application Number:
JP2004173081A
Publication Date:
December 22, 2005
Filing Date:
June 10, 2004
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
G02F2/02; H01S3/10; H04B10/2507; H04B10/29; H04B10/299; H04B10/516; H04B10/524; H04B10/54; H04B10/61; (IPC1-7): G02F2/02; H01S3/10; H04B10/02; H04B10/04; H04B10/06; H04B10/142; H04B10/152; H04B10/16; H04B10/17; H04B10/18
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe