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EP0224282A1
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Optical transmission system comprising a radiation source and a multiple-clad monomode optical transmission fibre with a negative-step index profile
Assignee: Koninklijke Philips NV
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Filing: 1986-09-23
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Granted: —
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Expires: 2006-09-23
Abstract
Abstract An optical transmission is described which comprises a radiation source (30) and a multiple-clad monomode optical transmission fibre (10) with a negative-step index profile. In order to improve the efficiency of coupling the radiation from the source into the transmission fibre a single-clad- monomode transmission fibre (20), whose end portion which faces the source is tapered, is arranged between the source and said fibre.
Inventors
- 👤 Giok Djan Khoe
- 👤 Peter Klaus Bachmann
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 07:12
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
An optical transmission system comprising a radiation source and a multiple-clad monomode optical transmission fibre with a negative-step index profile, characterized in that a single-clad monomode optical transmission fibre, whose end portion which faces the radiation source has a tapered core, is arranged between the multiple-clad monomode optical transmission fibre and the radiation source.
Claim 2
Dependent Claim
54 words
An optical transmission system comprising a radiation source and a multiple-clad monomode optical transmission fibre with a negative-step index profile, characterized in that a single-clad monomode optical transmission fibre, whose end portion which faces the radiation source has a tapered core, is arranged between the multiple-clad monomode optical transmission fibre and the radiation source.
Claim 3
Dependent Claim
40 words
An optical transmission system as claimed in Claim 1, characterized in that the spot size at the straight end of the single-clad monomode optical transmission fibre is substantially equal to the spot size of the multiple-clad monomode optical transmission fibre.
Claim 4
Dependent Claim
30 words
An optical transmission system as claimed in Claim 1 or 2, characterized in that a lens system is interposed between the radiation source and the single-clad monomode optical transmission fibre.
Claim 5
Dependent Claim
39 words
An optical transmission system as claimed in Claim 3, characterized in that the lens system comprises a transparent material which is applied to the end of the single-clad monomode optical transmission fibre and which has a spherical outer surface.
Claim 6
Dependent Claim
34 words
An optical transmission system as claimed in Claim 4, characterized in that the refractive index of the lens material is higher than that of the core material of the single-clad monomode optical transmission fibre.
Claim 7
Dependent Claim
49 words
An optical transmission system as claimed in Claim 4, characterized in that the lens material has a refractive index which is substantially equal to that of the core material and in that the lens material has a melting temperature which is lower than that of the transmission fibre material.
References Cited (Backward Citations)
DE2522039A1
Cited
FR2441859A1
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GB2064862A
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DE3131024A1
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GB2083646A
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GB2116744A
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EP0114439A1
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