JPS56132537A - Optical fiber simulator - Google Patents

Optical fiber simulator

Info

Publication number
JPS56132537A
JPS56132537A JP3549080A JP3549080A JPS56132537A JP S56132537 A JPS56132537 A JP S56132537A JP 3549080 A JP3549080 A JP 3549080A JP 3549080 A JP3549080 A JP 3549080A JP S56132537 A JPS56132537 A JP S56132537A
Authority
JP
Japan
Prior art keywords
signal
optical fiber
optical
fcl
band
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
JP3549080A
Other languages
Japanese (ja)
Other versions
JPS618380B2 (en
Inventor
Masakazu Mori
Yasuo Nagai
Sadao Ifukuro
Satoshi Ikeuchi
Toshiyuki Yamashita
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 JP3549080A priority Critical patent/JPS56132537A/en
Publication of JPS56132537A publication Critical patent/JPS56132537A/en
Publication of JPS618380B2 publication Critical patent/JPS618380B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

PURPOSE:To generate a simulated optical signal which has the similar arbitrary band characteristics of an optical fiber in a simple structure, by employing a Thomsen filter with quartic or more dimensions whose attenuating characteristics are the same as the optical fiber. CONSTITUTION:A cutoff frequency f3dB is based on an equation II for the Thomson filter 2 with quartic or more dimensions whose attenuating characteristic is square Gauss characteristic. A frequency band fCL is based on an equation I for the optical fiber whose attenuation characteristics is the square Gauss characteristic. If the cutoff frequency f3dB is selected so as to obtain fCL/(2<1/2>)with respect to the frequency band fCL, an electrical signal from an analog or digital signal generator 1 is applied to an LED4 via the filter 2 and a light emitting element driving circuit 3. The amount of light emission of the LED4 linearly varies with the amplitude of the applied electric signal. Therefore, the arbitrary band characteristics of the optical fiber can be simulated in a simple structure, the optical signal is outputted, and the accurate test of the optical transmission system can be performed. In this case alpha and alpha' are the optical-signal and the electrical-signal attenuating quantities, respectively, and f is the frequency in the band.
JP3549080A 1980-03-19 1980-03-19 Optical fiber simulator Granted JPS56132537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3549080A JPS56132537A (en) 1980-03-19 1980-03-19 Optical fiber simulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3549080A JPS56132537A (en) 1980-03-19 1980-03-19 Optical fiber simulator

Publications (2)

Publication Number Publication Date
JPS56132537A true JPS56132537A (en) 1981-10-16
JPS618380B2 JPS618380B2 (en) 1986-03-13

Family

ID=12443180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3549080A Granted JPS56132537A (en) 1980-03-19 1980-03-19 Optical fiber simulator

Country Status (1)

Country Link
JP (1) JPS56132537A (en)

Also Published As

Publication number Publication date
JPS618380B2 (en) 1986-03-13

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