JPS6468718A - Optical modulator - Google Patents

Optical modulator

Info

Publication number
JPS6468718A
JPS6468718A JP22621687A JP22621687A JPS6468718A JP S6468718 A JPS6468718 A JP S6468718A JP 22621687 A JP22621687 A JP 22621687A JP 22621687 A JP22621687 A JP 22621687A JP S6468718 A JPS6468718 A JP S6468718A
Authority
JP
Japan
Prior art keywords
light
branch
wavelength
incident
difference
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP22621687A
Other languages
Japanese (ja)
Inventor
Hideo Maeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP22621687A priority Critical patent/JPS6468718A/en
Publication of JPS6468718A publication Critical patent/JPS6468718A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To increase the amount of information in a very-high-speed and wide modulation band and to improve the quenching ratio of output light by forming two branch waveguides with a difference in optical length corresponding to half wavelength, and providing a diffraction grating device which varies the branching rate at the branch part. CONSTITUTION:While incident light is branched in two directions by the branch waveguides 22 and 23 and coupled together again, a phase difference is given to both branched light beams and the intensity of the composite light is varied. Then the two branch waveguides are formed with the optical length difference (lambda/2)+nlambda (lambda: wavelength of incident light, n: integer such as 0, 1, 2,-) and the diffraction grating 27 which diffracts only target wavelength light and is set to a prescribed grating constant for modulation to vary the branching rate is provided at an incident branch part. Consequently, the amount of information can be increased in the very-high-speed and wide modulation range and the quenching rate of the output light is increased.
JP22621687A 1987-09-09 1987-09-09 Optical modulator Pending JPS6468718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22621687A JPS6468718A (en) 1987-09-09 1987-09-09 Optical modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22621687A JPS6468718A (en) 1987-09-09 1987-09-09 Optical modulator

Publications (1)

Publication Number Publication Date
JPS6468718A true JPS6468718A (en) 1989-03-14

Family

ID=16841714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22621687A Pending JPS6468718A (en) 1987-09-09 1987-09-09 Optical modulator

Country Status (1)

Country Link
JP (1) JPS6468718A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0489914U (en) * 1990-11-07 1992-08-05

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0489914U (en) * 1990-11-07 1992-08-05

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