Title:
OPTICAL MULTIPLEXER DEMULTIPLEXER CIRCUIT
Document Type and Number:
Japanese Patent JP3201566
Kind Code:
B2
Abstract:
PURPOSE: To demultiplex lots of channels altogether by using a 1st optical AND circuit to process an optical short pulse and a wavelength multiplexed light and using a 2nd optical AND circuit to process a signal light subject to multiplexing and demultiplexing and a control light outputted from a diffusion circuit thereby branching a wavelength conversion light for each wavelength.
CONSTITUTION: An optical short pulse light source 11 outputs an optical short pulse train (b) whose wavelength is λp and a multi wavelength light source 12 applies wavelength multiplex to a continuous light whose wavelengths are λ1-λn to provide an output of a wavelength multiple light (c). An optical AND circuit 13 receives the pulse train (b) and the multiplex light (c) to provide an output of a wavelength multiple optical short pulse train (d). The pulse train (d) is inputted to an optical fiber 14, in which the pulse train is converted into a control light (e) arranged on time base depending on the wavelengths λ1-λn. An optical AND circuit 15 receives the signal light (a) and the control light (e) whose wavelength is λs to output a wavelength conversion light (f) of each channel whose wavelength is converted into the wavelengths λ1-λn. The conversion light (f) is given to an optical branching device 16, in which the light is branched into a multiplex demultiplex output light (g) corresponding to each wavelength. Thus, the wavelength of the signal light is converted into a wavelength different from each channel.
Inventors:
Akiko Taiki
Toshikazu Sakano
Toshikazu Sakano
Application Number:
JP526395A
Publication Date:
August 20, 2001
Filing Date:
January 17, 1995
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04J14/00; G02F1/35; G02F2/02; H04B10/25; H04B10/27; H04B10/29; H04B10/524; H04B10/572; H04B10/58; H04J14/02; H04J14/08; (IPC1-7): H04J14/08
Domestic Patent References:
| JP8163096A | ||||
| JP8110534A | ||||
| JP8101412A | ||||
| JP419718A | ||||
| JP1296827A | ||||
| JP10508116A |
Attorney, Agent or Firm:
Furuya Fumio