JPS57114124A - Pressure modulating system of optical pulse - Google Patents

Pressure modulating system of optical pulse

Info

Publication number
JPS57114124A
JPS57114124A JP18749580A JP18749580A JPS57114124A JP S57114124 A JPS57114124 A JP S57114124A JP 18749580 A JP18749580 A JP 18749580A JP 18749580 A JP18749580 A JP 18749580A JP S57114124 A JPS57114124 A JP S57114124A
Authority
JP
Japan
Prior art keywords
optical
diaphragm
voice
reflected light
optical pulse
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
JP18749580A
Other languages
Japanese (ja)
Inventor
Noboru Tsuneyo
Eizo Miyauchi
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 JP18749580A priority Critical patent/JPS57114124A/en
Publication of JPS57114124A publication Critical patent/JPS57114124A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
    • G01H9/006—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors the vibrations causing a variation in the relative position of the end of a fibre and another element

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To obtain an optically modulated pulse directly from a change of pressure, by receiving the reflected light from a diaphragm by an optical fiber trains provided in the direction rectangular to the reflected light and selecting previously the optical fiber trains so as to have different optical lengths. CONSTITUTION:The reflected light beams 1a and 2a are generated as shown by chart B when incident optical pulse trains 1 and 2 shown by chart A are made incident to an optical coupler LCT at the area near an optical transmission fiber LFB. The lateral axes of charts A and B show the time (t) respectively, and a diaphragm is displaced by the sound pressure caused by the voice, etc. The light sent from a condenser lens LNS1 is irradiated at the area shown by a broken line. Accordingly the incident position of a fiber array FBA is varied. As a delay line LD is connected to the array FBA, the optical pulses coming back to the coupler LCT are turned to 1b and 2b. Then the position of the optical pulse is modulated by the displacement of a diaphragm DIF due to a voice, and the modulated position of the optical pulse is demodulated at the receiver side to extract the voice.
JP18749580A 1980-12-30 1980-12-30 Pressure modulating system of optical pulse Pending JPS57114124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18749580A JPS57114124A (en) 1980-12-30 1980-12-30 Pressure modulating system of optical pulse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18749580A JPS57114124A (en) 1980-12-30 1980-12-30 Pressure modulating system of optical pulse

Publications (1)

Publication Number Publication Date
JPS57114124A true JPS57114124A (en) 1982-07-15

Family

ID=16207056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18749580A Pending JPS57114124A (en) 1980-12-30 1980-12-30 Pressure modulating system of optical pulse

Country Status (1)

Country Link
JP (1) JPS57114124A (en)

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