JPS554017A - Photo switch - Google Patents

Photo switch

Info

Publication number
JPS554017A
JPS554017A JP7602378A JP7602378A JPS554017A JP S554017 A JPS554017 A JP S554017A JP 7602378 A JP7602378 A JP 7602378A JP 7602378 A JP7602378 A JP 7602378A JP S554017 A JPS554017 A JP S554017A
Authority
JP
Japan
Prior art keywords
light
information
modulator
filter
polarized state
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.)
Granted
Application number
JP7602378A
Other languages
Japanese (ja)
Other versions
JPS6144293B2 (en
Inventor
Mitsuto Sakaguchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7602378A priority Critical patent/JPS554017A/en
Publication of JPS554017A publication Critical patent/JPS554017A/en
Publication of JPS6144293B2 publication Critical patent/JPS6144293B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To protect information and control signals from the effect of electrode induction by controlling the operation of a photo switch by the light of the wavelength differing from the wavelength of the light signal having been modulated by information.
CONSTITUTION: Unless there is applied voltage from an FF5 to a light modulator 1 when the information light 10 having been obtained through direct modulation of a semiconductor laser enters in the polarized state parallel to the plane of the figure, it advances straight in crystal 2 and transmits through a filter 3, thus becoming exit light 11. Next, when control light 20 is entered, it is reflected by the filter 3 and operates the FF5 via photoelectric transducer 4, thereby applying the voltage to the modulator 1. Because of this, the polarized state of the information light 10 out from the modulator 1 becomes perpendicular to the plane of the figure, advances by refracting at the crystal 2 and becomes exit light 12. At this time, the polarized state of the control light 20, eventually the reflected light position in the filter 3, also change but if the element 4 is made sufficiently large in size, it will not adversely affect photoswitching operation at all. In addition, the use of the FF enables the control light to be applied in a pulselike manner.
COPYRIGHT: (C)1980,JPO&Japio
JP7602378A 1978-06-22 1978-06-22 Photo switch Granted JPS554017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7602378A JPS554017A (en) 1978-06-22 1978-06-22 Photo switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7602378A JPS554017A (en) 1978-06-22 1978-06-22 Photo switch

Publications (2)

Publication Number Publication Date
JPS554017A true JPS554017A (en) 1980-01-12
JPS6144293B2 JPS6144293B2 (en) 1986-10-02

Family

ID=13593219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7602378A Granted JPS554017A (en) 1978-06-22 1978-06-22 Photo switch

Country Status (1)

Country Link
JP (1) JPS554017A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57187131A (en) * 1981-05-13 1982-11-17 Mitsubishi Metal Corp Formed goods setting material with turntable
JPS57199533A (en) * 1981-06-03 1982-12-07 Mitsubishi Metal Corp Parts loading device of reforming press

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57187131A (en) * 1981-05-13 1982-11-17 Mitsubishi Metal Corp Formed goods setting material with turntable
JPS57199533A (en) * 1981-06-03 1982-12-07 Mitsubishi Metal Corp Parts loading device of reforming press

Also Published As

Publication number Publication date
JPS6144293B2 (en) 1986-10-02

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