Title:
OPTICAL FREQUENCY CONTROLLER
Document Type and Number:
Japanese Patent JP3193220
Kind Code:
B2
Abstract:
PURPOSE: To provide an optical frequency controller capable of performing frequency shift covering a wide range and stable conversion in an optical frequency.
CONSTITUTION: An optical pulse signal is outputted repeatedly at every period as an optical signal 6a whose optical frequency component is changed in stair shape according to the number of circulations by circulating through a loop in the optical frequency shifter 18. Then, by a part of the optical signal 6a is supplied to a light receiving circuit 11, the timing when the level of the optical signal 6a becomes zero is detected and outputted as a timing signal 13a. A dummy beam 16a generated according to the timing signal 13a is supplied from a dummy light source 16 to the optical frequency shifter 18. Thus, the nonsignal state of the optical pulse signal supplied to an optical amplifier 5 is eliminated, and the occurrence of distortion in an outputted waveform is suppressed.
More Like This:
| JPS61175621 | ORTHOGONAL POLARIZATION TYPE OPTICAL FREQUENCY SHIFTER |
| WO/2005/019922 | COMPLETE LIGHT SWITCH |
Inventors:
Haruyoshi Uchiyama
Cheol Hyun Lee
Nobuaki Takeuchi
Kaoru Shimizu
Tsuneo Horiguchi
Yahei Oyamada
Cheol Hyun Lee
Nobuaki Takeuchi
Kaoru Shimizu
Tsuneo Horiguchi
Yahei Oyamada
Application Number:
JP33866893A
Publication Date:
July 30, 2001
Filing Date:
December 28, 1993
Export Citation:
Assignee:
Ando Electric Co., Ltd.
Nippon Telegraph and Telephone Corporation
Nippon Telegraph and Telephone Corporation
International Classes:
G02F2/02; H01S3/067; (IPC1-7): G02F2/02
Domestic Patent References:
| JP5232540A | ||||
| JP637378A | ||||
| JP5129695A |
Other References:
１９９３年電子情報通信学会春季大会講演論文集４（１９９３年３月１５日発行）ｐ．４−３２８
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Ａｐｐｌｉｅｄ Ｏｐｔｉｃｓ，Ｖｏｌ．３２ Ｎｏ．３３（２０ Ｎｏｖｅｍｂｅｒ １９９３）ｐｐ．６７１８−６７２６
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Attorney, Agent or Firm:
Masatake Shiga (2 outside)