Title:
TRAVELING WAVE OPTICAL MODULATOR AND ITS REGULATING METHOD
Document Type and Number:
WIPO Patent Application WO/2005/096077
Kind Code:
A1
Abstract:
A traveling wave optical modulator in which occurrence of jitter is suppressed when it is driven through a driver, and its regulating method; especially in which the degree of freedom is enlarged in the combination of the driver and the traveling wave optical modulator and jitter can be suppressed effectively even after they are combined, and its regulating method. The traveling wave optical modulator comprises a substrate exhibiting electrooptic effect, an optical waveguide formed on the substrate, and a modulation electrode performing modulation control on a light wave propagating through the optical waveguide, characterized in that the traveling wave optical modulator is connected with a driver performing drive control thereof, and the frequency characteristics (b) of electrooptic conversion response of the traveling wave optical modulator is regulated to correct the frequency characteristics (a) of gain of the driver. Preferably, regulation of the frequency characteristics of electrooptic conversion response is characterized by the regulation of at least one of the impedance of the modulation electrode or the impedance of a termination resistor.
Inventors:
Shimizu, Ryo c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Maruyama, Taishi c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Sugamata, Tohru c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Maruyama, Taishi c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Sugamata, Tohru c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Application Number:
PCT/JP2005/006039
Publication Date:
October 13, 2005
Filing Date:
March 30, 2005
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO., LTD. (6-28, Rokuban-cho Chiyoda-k, Tokyo 65, 10284, JP)
Shimizu, Ryo c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Maruyama, Taishi c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Sugamata, Tohru c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Shimizu, Ryo c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Maruyama, Taishi c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
Sugamata, Tohru c/o Sumitomo Osaka Cement Co. Ltd. (6-28, Rokuban-cho, Chiyoda-k, Tokyo 65, 10284, JP)
International Classes:
G02F1/03; G02F1/035; G02F1/01; (IPC1-7): G02F1/03; G02F1/035
Attorney, Agent or Firm:
Tamura, Chikashi (Akasaka Misuzu Bldg.4F, 4-10, Akasaka 1-chome,, Minato-k, Tokyo 52, 10700, JP)
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