OPTICAL WAVELENGTH CONTROLLER AND OPTICAL WAVELENGTH CONTROL METHOD

Japanese Patent JP3242898

B2

PROBLEM TO BE SOLVED: To provide an optical wavelength controller capable of pulling the optical wavelength of a light source which is indefinite and unstable in a central wavelength into a prescribed reference light wavelength at an optical pulling frequency width of ≥100 GHz and an optical wavelength control method.
SOLUTION: This optical wavelength controller has a wavelength sweep section 2 which obtains a light pulse having a phase corresponding to the optical wavelength of the light to be controlled inputted from the wavelength variable light source 1 by sweeping the light to be controlled at a prescribed period and a phase detection section 3 which controls the wavelength variable light source 1 by detecting the phase difference between the phase of the light pulse and the phase corresponding to the reference optical wavelength and feeding the phase difference back to the wavelength variable light source 1 in such a manner that the optical wavelength of the light to be controlled is controlled by the optical pulling frequency to the refractive index optical wavelength in accordance with the phase difference. As a result, a wide-band control required for the optical frequency control of the light source used in an ultra- high speed time division multiplex optical transmission system and high-density wavelength multiplex optical transmission system.

Koh Imajuku
Yoshimasa Katagiri

JP11274499A

December 25, 2001

April 20, 1999

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Nippon Telegraph and Telephone Corporation

G02F2/02; H01S3/13; H01S5/00; H01S5/0687; H04B10/07; H04B10/293; H04B10/524; H04B10/54; H04B10/556; H04B10/564; H04B10/572; (IPC1-7): H01S3/13; H01S5/0687

JP1158788A
JP1253980A
JP334483A
JP3225981A
JP4118982A
JP63500973A

Hidekazu Miyoshi (1 outside)

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