IT1145711B - Attenuator back-scatter measuring device in optical fibre - Google Patents
Attenuator back-scatter measuring device in optical fibreInfo
- 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
Links
- 239000013307 optical fiber Substances 0.000 title 1
- 239000000835 fiber Substances 0.000 abstract 3
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
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.
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) |
-
1981
- 1981-11-09 IT IT68446/81A patent/IT1145711B/en active
Also Published As
Publication number | Publication date |
---|---|
IT8168446A0 (en) | 1981-11-09 |
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