Title:
ELECTRO-OPTIC SSB OPTICAL MODULATOR AND OPTICAL FREQUENCY SHIFTER HAVING CYCLIC DOMAIN INVERSION STRUCTURE
Document Type and Number:
Japanese Patent JP3639198
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electro-optic optical SSB(single sideband) modulator and optical frequency shifter having cyclic domain inversion structure whose structure is simple, whose adjustment is easy also, which operates at the high frequency of 1 GHz to 100 GHz, whose size is small, which has high efficiency and which can be driven with small power.
SOLUTION: This optical modulator and optical frequency shifter uses an electro-optic crystal which is applied with cyclic polarity inversion structure in which spatial arrangement of polarities are shifted by 1/4 cycle each other and is made to have structure in which the electro-optic crystal is combined with Mach-Zehnder interferometer waveguides 3 and traveling-wave electrodes 5. Then, the modulator and shifter can perform the operation of a sin-modulation and a cos-modulation only by supplying a modulation signal 8 from a power feeding circuit.
Inventors:
Hiroshi Murata
Tetsuro Kobayashi
Tetsuro Kobayashi
Application Number:
JP2000250492A
Publication Date:
April 20, 2005
Filing Date:
August 22, 2000
Export Citation:
Assignee:
Japan Science and Technology Agency
International Classes:
G02F1/035; G02F2/02; (IPC1-7): G02F1/035; G02F2/02
Domestic Patent References:
| JP7005404A |
Other References:
IEEE PHOTON.TECH.LETT.,1997年,VOL.9,NO.5,610-612
ELECTRON.LETT.,2000年 8月17日,VOL.36,NO.17,1459-1460
ELECTRON.LETT.,2000年 8月17日,VOL.36,NO.17,1459-1460
Attorney, Agent or Firm:
Mamoru Shimizu