IT1145711B - Attenuator back-scatter measuring device in optical fibre - Google Patents

Attenuator back-scatter measuring device in optical fibre

Info

Publication number
IT1145711B
IT1145711B IT68446/81A IT6844681A IT1145711B IT 1145711 B IT1145711 B IT 1145711B IT 68446/81 A IT68446/81 A IT 68446/81A IT 6844681 A IT6844681 A IT 6844681A IT 1145711 B IT1145711 B IT 1145711B
Authority
IT
Italy
Prior art keywords
photodetector
fibre
enables
integrator circuit
measuring device
Prior art date
Application number
IT68446/81A
Other languages
Italian (it)
Other versions
IT8168446A0 (en
Inventor
Carlo Giacomo Someda
Maurizio Zoboli
Original Assignee
Ceat Cavi Spa
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 Ceat Cavi Spa filed Critical Ceat Cavi Spa
Priority to IT68446/81A priority Critical patent/IT1145711B/en
Publication of IT8168446A0 publication Critical patent/IT8168446A0/en
Priority to GB8202924A priority patent/GB2092743A/en
Priority to DE19823204574 priority patent/DE3204574A1/en
Application granted granted Critical
Publication of IT1145711B publication Critical patent/IT1145711B/en

Links

Abstract

The device includes a generator and transmitter of optical pulses to the fibre, a beam splitter and photodetection, amplification and signal processing devices. The detector contains an integrator circuit, connected downstream from a photodetector, and which supplies an output signal which is the time-integral of one electrical signal, from the photodetector. The pass-band of the integrator circuit may be changed by altering its reactive component values, with consequent optimisation of the opposing factors of maximum inspectable fibre length and spatial resolution. The use of two similar circuits with one photodetector irradiated by backscattered light from the fibre and the other shielded from light, enables the subtraction of spurious signals by a differential amplifier. A logarithmic amplifier enables a linear output to be generated at terminal.
IT68446/81A 1981-02-10 1981-11-09 Attenuator back-scatter measuring device in optical fibre IT1145711B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IT68446/81A IT1145711B (en) 1981-11-09 1981-11-09 Attenuator back-scatter measuring device in optical fibre
GB8202924A GB2092743A (en) 1981-02-10 1982-02-02 Apparatus for Measuring Attenuation in an Optical Fibre
DE19823204574 DE3204574A1 (en) 1981-02-10 1982-02-10 DEVICE FOR MEASURING THE DAMPING OF A LENGTH OF AN OPTICAL SIGNAL PROCESSING OPTICAL SIGNAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT68446/81A IT1145711B (en) 1981-11-09 1981-11-09 Attenuator back-scatter measuring device in optical fibre

Publications (2)

Publication Number Publication Date
IT8168446A0 IT8168446A0 (en) 1981-11-09
IT1145711B true IT1145711B (en) 1986-11-05

Family

ID=11309439

Family Applications (1)

Application Number Title Priority Date Filing Date
IT68446/81A IT1145711B (en) 1981-02-10 1981-11-09 Attenuator back-scatter measuring device in optical fibre

Country Status (1)

Country Link
IT (1) IT1145711B (en)

Also Published As

Publication number Publication date
IT8168446A0 (en) 1981-11-09

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