JPS5552023A - Light modulator control system - Google Patents

Light modulator control system

Info

Publication number
JPS5552023A
JPS5552023A JP12463378A JP12463378A JPS5552023A JP S5552023 A JPS5552023 A JP S5552023A JP 12463378 A JP12463378 A JP 12463378A JP 12463378 A JP12463378 A JP 12463378A JP S5552023 A JPS5552023 A JP S5552023A
Authority
JP
Japan
Prior art keywords
signal
phase
circuit
digital modulating
carrier signal
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
JP12463378A
Other languages
Japanese (ja)
Inventor
Tomohisa Mikami
Fumitaka Abe
Fumio Sakurai
Tadashi Matsuda
Takayuki Kokai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP12463378A priority Critical patent/JPS5552023A/en
Publication of JPS5552023A publication Critical patent/JPS5552023A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform light modulation of high quality by providing a variable delay circuit, etc. and maintaining the modulated light beam always at a fixed state even if the carrier signal and digital modulating signal are not in the special synchronizing relation.
CONSTITUTION: The signal S2 from a carrier signal generator 8 is phase adjusted by a phase adjusting circuit 9 and is inputted to an amplitude modulating circuit 10. The digital modulating signal S2' is being inputted via delay circuit 11 to the amplitude modulating circuit 10, hence the carrier signal S2 is amplitude-modulated by the digital modulating signal S2'. The output signal S3 of a phase difference detecting circuit 13 is applied to a variable delay circuit 12, by which the carrier signal S2' whose phase becomes always the specified phase at each rise point of the digital modulating signal S0. Hence, the phases of the carrier signal at each rise point of the digital modulating signal S0 and digital modulating signal S0' become always the same phase. In this way, light modulation of high quality may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
JP12463378A 1978-10-12 1978-10-12 Light modulator control system Pending JPS5552023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12463378A JPS5552023A (en) 1978-10-12 1978-10-12 Light modulator control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12463378A JPS5552023A (en) 1978-10-12 1978-10-12 Light modulator control system

Publications (1)

Publication Number Publication Date
JPS5552023A true JPS5552023A (en) 1980-04-16

Family

ID=14890237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12463378A Pending JPS5552023A (en) 1978-10-12 1978-10-12 Light modulator control system

Country Status (1)

Country Link
JP (1) JPS5552023A (en)

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