FR2428267A1 - Backward diffused light measuring device for optical fibres - has filter and focussing lens and separates and detects depolarised diffused light - Google Patents

Backward diffused light measuring device for optical fibres - has filter and focussing lens and separates and detects depolarised diffused light

Info

Publication number
FR2428267A1
FR2428267A1 FR7817420A FR7817420A FR2428267A1 FR 2428267 A1 FR2428267 A1 FR 2428267A1 FR 7817420 A FR7817420 A FR 7817420A FR 7817420 A FR7817420 A FR 7817420A FR 2428267 A1 FR2428267 A1 FR 2428267A1
Authority
FR
France
Prior art keywords
diffused light
filter
optical fibres
lens
depolarised
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
FR7817420A
Other languages
French (fr)
Other versions
FR2428267B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7817420A priority Critical patent/FR2428267A1/en
Publication of FR2428267A1 publication Critical patent/FR2428267A1/en
Application granted granted Critical
Publication of FR2428267B1 publication Critical patent/FR2428267B1/fr
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
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3181—Reflectometers dealing with polarisation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4206—Optical features

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

The device is for the measurement of backward diffused light in optical fibres esp. for determination of attenuation in communications networks. The light source is a laser whose output passes through a collimating SELFOC (RTM) lens to a Glan filter (6). This is coupled to an optical fibre (8) via a second SELFOC (RTM) lens 50% of the polarised light reflected from the far end (13) of the fibre is deflected in the filter towards a detector (12) via a focussing lens (14). The detected levels allows attenuation to be deduced from a curve of light level against length of fibre.
FR7817420A 1978-06-06 1978-06-06 Backward diffused light measuring device for optical fibres - has filter and focussing lens and separates and detects depolarised diffused light Granted FR2428267A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7817420A FR2428267A1 (en) 1978-06-06 1978-06-06 Backward diffused light measuring device for optical fibres - has filter and focussing lens and separates and detects depolarised diffused light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7817420A FR2428267A1 (en) 1978-06-06 1978-06-06 Backward diffused light measuring device for optical fibres - has filter and focussing lens and separates and detects depolarised diffused light

Publications (2)

Publication Number Publication Date
FR2428267A1 true FR2428267A1 (en) 1980-01-04
FR2428267B1 FR2428267B1 (en) 1980-10-24

Family

ID=9209341

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7817420A Granted FR2428267A1 (en) 1978-06-06 1978-06-06 Backward diffused light measuring device for optical fibres - has filter and focussing lens and separates and detects depolarised diffused light

Country Status (1)

Country Link
FR (1) FR2428267A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038563A2 (en) * 1980-04-23 1981-10-28 CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. Optical system with high coupling efficiency, in particular for attenuation measurement apparatuses employing the back-scattering technique
WO2013132398A3 (en) * 2012-03-09 2013-11-07 Lumenis Ltd. Evaluation of optical fibre integrity

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ABJP/77 *
EXBK/76 *
EXBK/78 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038563A2 (en) * 1980-04-23 1981-10-28 CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. Optical system with high coupling efficiency, in particular for attenuation measurement apparatuses employing the back-scattering technique
EP0038563A3 (en) * 1980-04-23 1982-04-14 CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. Optical system with high coupling efficiency, in particular for attenuation measurement apparatuses employing the back-scattering technique
WO2013132398A3 (en) * 2012-03-09 2013-11-07 Lumenis Ltd. Evaluation of optical fibre integrity

Also Published As

Publication number Publication date
FR2428267B1 (en) 1980-10-24

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Legal Events

Date Code Title Description
TP Transmission of property
TP Transmission of property
ST Notification of lapse