INTERFACE DEVICE

Japanese Patent JP3641425

B2

PROBLEM TO BE SOLVED: To highly accurately control an oscillation wavelength in simple circuit constitution.
SOLUTION: A transmission part 1 is provided with a single wavelength light source part 90 provided with a plurality of unit circuits for inputting a plurality of optical signals 3 and outputting a plurality of the optical signals of different wavelengths, an optical multiplex part 106 for inputting a plurality of the optical signals outputted from the single wavelength light source part 90 and outputting a plurality of the inputted optical signals as one wavelength multiplexed optical signal 4 by multiplex, an inspection signal extraction means 105 for extracting a part of a plurality of the optical signals outputted from the single wavelength light source part 90 and inputting the extracted signal as an inspection signal 7 to the optical multiplex part 106 and operation control means 108 and 109 for detecting the inspection signal 7 inputted to the optical multiplex part 106, discriminating the state of the detected inspection signal 7 and outputting control signals for controlling the operation of the single wavelength light source part 90.

Yoshinori Yamauchi
Koichi Fujisaki
Akemi Kaneko
Yoshihisa Kai

JP2000370651A

April 20, 2005

December 05, 2000

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NT Electronics Co., Ltd.
Nippon Telegraph and Telephone Corporation

G02B6/12; H04B10/07; H04B10/077; H04B10/079; H04B17/00; H04J14/00; H04J14/02; (IPC1-7): H04B10/08; G02B6/12; H04J14/00; H04J14/02

JP2000232417A
JP11168450A
JP2000065686A

Yoshikazu Tani
Kazuo Abe

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