OPTICAL FREQUENCY SHIFTER - NIPPON TELEGRAPH & TELEPHONE

Title:

OPTICAL FREQUENCY SHIFTER

Document Type and Number:

Japanese Patent JPH11326977

Kind Code:

A

Abstract:

To provide an optical frequency shifter which has a large shift quantity.

This optical frequency shifter removes unnecessary light and amplifies necessary light by making good use of an injection synchronization phenomenon obtained by making light of specific fundamental light frequency incident on an electrooptic modulator 21 applied with a modulating signal generated by an RF generating device 22 and imposing modulation, making output light containing various frequency components such as sidebands incident on a semiconductor laser 23, and also controlling the driving current from a constant-current source 24 so that the free-running frequency of the semiconductor laser 23 of only a selected sideband enters an injection synchronizable range.

Inventors:

ISHIKAWA MITSUE
KANO FUMIYOSHI
YOSHIKUNI YUZO

Application Number:

JP12731298A

Publication Date:

November 26, 1999

Filing Date:

May 11, 1998

Export Citation:

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Assignee:

NIPPON TELEGRAPH & TELEPHONE

International Classes:

G02F2/02; (IPC1-7): G02F2/02

Attorney, Agent or Firm:

Yoshitaka Yoshitaka

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