JPS57163217A - Frequency converting circuit - Google Patents

Frequency converting circuit

Info

Publication number
JPS57163217A
JPS57163217A JP4877981A JP4877981A JPS57163217A JP S57163217 A JPS57163217 A JP S57163217A JP 4877981 A JP4877981 A JP 4877981A JP 4877981 A JP4877981 A JP 4877981A JP S57163217 A JPS57163217 A JP S57163217A
Authority
JP
Japan
Prior art keywords
signal
converting circuit
phase
frequency converting
power consumption
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
JP4877981A
Other languages
Japanese (ja)
Inventor
Yoshinori Oota
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 JP4877981A priority Critical patent/JPS57163217A/en
Publication of JPS57163217A publication Critical patent/JPS57163217A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D9/00—Demodulation or transference of modulation of modulated electromagnetic waves
    • H03D9/06—Transference of modulation using distributed inductance and capacitance
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2/00—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
    • G02F2/002—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light using optical mixing

Abstract

PURPOSE:To obtain a miniature frequency converting circuit having high performance and low power consumption, by modulating the phase of light wave by a micorwave signal and a local oscillation signal. CONSTITUTION:The laser beam oscillated by exciting a semiconductor laser 3 with a DC is led to a waveguide 2 through an electrooptical crystal edge and branched with the equal intensity through a Y branching filter 11 to go to optical waveguides 12 and 13 which form a phase modulator. The beams going to the waveguides 12 and 13 receive the modulation of phase by a microwave signal 7 and a local oscillation signal 8 respectively. These two light waves are synthesized through a 3dB coupler 14 and then receive the heterodyne wave detection through a photodetector. The signal 10 detected by the heterodyne wave passes through an electrical filter that trnasmits only the differential frequency between the signals 7 and 8. Thus the microwave signal is exchanged to an intermediate frequency band. In such a way, a wide band width and a miniature structure are attained with low power consumption for a frequency converting circuit.
JP4877981A 1981-04-01 1981-04-01 Frequency converting circuit Pending JPS57163217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4877981A JPS57163217A (en) 1981-04-01 1981-04-01 Frequency converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4877981A JPS57163217A (en) 1981-04-01 1981-04-01 Frequency converting circuit

Publications (1)

Publication Number Publication Date
JPS57163217A true JPS57163217A (en) 1982-10-07

Family

ID=12812736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4877981A Pending JPS57163217A (en) 1981-04-01 1981-04-01 Frequency converting circuit

Country Status (1)

Country Link
JP (1) JPS57163217A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3713990A1 (en) * 1986-05-16 1987-11-19 Ericsson Telefon Ab L M OPTO-ELECTRONIC DIRECTIONAL COUPLER FOR A TENSION-FREE CONTROL SIGNAL
US5005932A (en) * 1989-11-06 1991-04-09 Hughes Aircraft Company Electro-optic modulator
EP0658015A1 (en) * 1993-12-07 1995-06-14 Ascom Tech Ag Apparatus for transmitting an intensity- and phase-modulated light beam

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3713990A1 (en) * 1986-05-16 1987-11-19 Ericsson Telefon Ab L M OPTO-ELECTRONIC DIRECTIONAL COUPLER FOR A TENSION-FREE CONTROL SIGNAL
US5005932A (en) * 1989-11-06 1991-04-09 Hughes Aircraft Company Electro-optic modulator
EP0658015A1 (en) * 1993-12-07 1995-06-14 Ascom Tech Ag Apparatus for transmitting an intensity- and phase-modulated light beam

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