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JPS5661845A - Optical transmission device - Google Patents

Optical transmission device

Info

Publication number
JPS5661845A
JPS5661845A JP13800679A JP13800679A JPS5661845A JP S5661845 A JPS5661845 A JP S5661845A JP 13800679 A JP13800679 A JP 13800679A JP 13800679 A JP13800679 A JP 13800679A JP S5661845 A JPS5661845 A JP S5661845A
Authority
JP
Japan
Prior art keywords
transmission
optical fiber
laser diode
signal
frequency
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
JP13800679A
Other languages
Japanese (ja)
Inventor
Katsuyoshi Ito
Akira Fujita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13800679A priority Critical patent/JPS5661845A/en
Publication of JPS5661845A publication Critical patent/JPS5661845A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To increase not only the transmission capacity of the optical fiber but the distance of transmission, by using the optical fiber for the transmission line and the laser diode for the light source each and then securing transmission of the analog signal with no effect of the noise caused by the laser diode. CONSTITUTION:The signal source 1 modulates the output of the oscillator 3 of the frequency f via the modulator 2 and by the signal of a frequency band of DELTAf=0- B Hz. This frequency f can avoid the effect of the noise caused by the laser diode LD. The modulated optical output enters the photodetector 21 of the receiver 200 through the optical fiber transmission line 10 to be turned into the electric signal. This electric signal is then demodulated by the wave detector 23 and through the preamplifier 22 to be amplified up to the prescribed level by the amplifier 24. As a result, not only the transmission capacity of optical fiber but the transmission distance can be increased.
JP13800679A 1979-10-24 1979-10-24 Optical transmission device Pending JPS5661845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13800679A JPS5661845A (en) 1979-10-24 1979-10-24 Optical transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13800679A JPS5661845A (en) 1979-10-24 1979-10-24 Optical transmission device

Publications (1)

Publication Number Publication Date
JPS5661845A true JPS5661845A (en) 1981-05-27

Family

ID=15211850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13800679A Pending JPS5661845A (en) 1979-10-24 1979-10-24 Optical transmission device

Country Status (1)

Country Link
JP (1) JPS5661845A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01206598A (en) * 1988-02-12 1989-08-18 Rigaku Denki Kk High voltage power supply for x-ray generating device
JPH01238832A (en) * 1988-03-19 1989-09-25 Hitachi Medical Corp X-ray fluoroscopically photographing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01206598A (en) * 1988-02-12 1989-08-18 Rigaku Denki Kk High voltage power supply for x-ray generating device
JPH01238832A (en) * 1988-03-19 1989-09-25 Hitachi Medical Corp X-ray fluoroscopically photographing device

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