GB1486633A - Dielectric optical waveguides - Google Patents

Dielectric optical waveguides

Info

Publication number
GB1486633A
GB1486633A GB4343174A GB4343174A GB1486633A GB 1486633 A GB1486633 A GB 1486633A GB 4343174 A GB4343174 A GB 4343174A GB 4343174 A GB4343174 A GB 4343174A GB 1486633 A GB1486633 A GB 1486633A
Authority
GB
United Kingdom
Prior art keywords
fibre
optics
modes
monochromotor
oct
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.)
Expired
Application number
GB4343174A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB4343174A priority Critical patent/GB1486633A/en
Publication of GB1486633A publication Critical patent/GB1486633A/en
Expired 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • 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
    • G01M11/35—Testing of optical devices, constituted by fibre optics or optical waveguides in which light is transversely coupled into or out of the fibre or waveguide, e.g. using integrating spheres

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1486633 Testing fibre optics POST OFFICE 31 Oct 1975 [7 Oct 1974] 43431/74 Heading G1A In an apparatus for assessing the performance of dielectric optical waveguides 5, light from a tungsten lamp 1 is passed via a variable frequency monochromotor 2 a second order filter and launching optics 11 into the fibre 5. The optical "cladding modes", due to the waveguide's optical cladding, are removed by a "stripper" 6. The remaining radiation modes passing through the guide 5 are then collected by a device 7 containing an index matching liquid in which the fibre is immersed. The output from an associated transducer 8 is fed to a "lock-in" amplifier 9 which also receives a reference signal from a chopper 10 positioned as shown. The amplifier 9's output is supplied to a chart recorder 14 along with 'wavelength markers" from the monochromotor 2. The device for collecting the radiation may be an integrating sphere. In both cases the fibre is immersed in an "indexing matching" liquid of refractive index slightly higher than the fibre core. The launching optics may be used to send light in symmetrically or asymmetrically relative to the fibre, depending upon the modes being investigated. A source of rear illumination 9 is provided to assist in aligning of the optics. Formulae and examples are disclosed.
GB4343174A 1975-10-31 1975-10-31 Dielectric optical waveguides Expired GB1486633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4343174A GB1486633A (en) 1975-10-31 1975-10-31 Dielectric optical waveguides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4343174A GB1486633A (en) 1975-10-31 1975-10-31 Dielectric optical waveguides

Publications (1)

Publication Number Publication Date
GB1486633A true GB1486633A (en) 1977-09-21

Family

ID=10428728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4343174A Expired GB1486633A (en) 1975-10-31 1975-10-31 Dielectric optical waveguides

Country Status (1)

Country Link
GB (1) GB1486633A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220411A (en) * 1978-08-14 1980-09-02 The United States Of America As Represented By The Secretary Of The Navy Fiber optic light launching assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220411A (en) * 1978-08-14 1980-09-02 The United States Of America As Represented By The Secretary Of The Navy Fiber optic light launching assembly

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee