Patent EP0590633A1 successfully refreshed from Google Patents.
EP0590633A1
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Optical fibre dispersion compensation technique for an optical communication system
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1993-09-29
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Granted: —
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Expires: 2013-09-29
Abstract
Abstract An optical communication system for compensating dispersion of an optical fiber serving as a transmission path is provided. In its simplest form of configuration, a dispersion compensating fiber having a sufficient length to compensate the chromatic dispersion of the optical fiber (100a) is divided into portions (200a, 200b) each having a length to maintain a linear characteristic of a relative intensity noise of the dispersion compensating fiber, and the divided portions (200a, 200b) of the dispersion compensating fiber are inserted in the path of the optical fiber while they are optically separated.
Inventors
- 👤 Masayuki Yokohama Works Shigematsu
- 👤 Tomonori Yokohama Works Kashiwada
- 👤 Masayuki Yokohama Works Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 04:19
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/28; G02B6/293; G02B6/29371; G02B6/29374; G02B6/29376; G02B6/29377; H; H04; H04B; H04B10/00; H04B10/25; H04B10/2507; H04B10/2513; H04B10/2525; H04B2210/00; H04B2210/25; H04B2210/252
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
126 words
An optical communication system comprising: a first dispersion compensating fiber having one end thereof connected to a first optical fiber serving as a transmission path for an optical signal and the other end thereof to be connected to an optical transmitter and having an oppsite sign of dispersion characteristic to that of said first optical fiber; and a second dispersion compensating fiber having one end thereof connected to said first optical fiber and the other end thereof to be connected to an optical receiver and having an oppsite sign of dispersion characteristic to that of said first optical fiber; a total length of said first dispersion compensating fiber and said second dispersion compensating fiber being long enough to compensate the dispersion of said first optical fiber.
Claim 2
Dependent Claim
123 words
An optical communication system comprising: a first dispersion compensating fiber having one end thereof connected to a first optical fiber serving as a transmission path for an optical signal and the other end thereof connected to a connecting member and having an opposite sign of dispersion characteristic to that of said first optical fiber; and a second dispersion compensating fiber having one end thereof connected to said connecting member and the other end thereof to be connected to an optical transmitter and having an opposite sign of dispersion characteristic to that of said first optical fiber; a total length of said first dispersion compensating fiber and said second dispersion compensating fiber being long enough to compensate the dispersion of said first optical fiber.
Claim 3
Dependent Claim
123 words
An optical communication system comprising: a first dispersion compensating fiber having one end thereof connected to an first optical fiber serving as a transmission path for an optical signal and the other end thereof connected to a connecting member and having an opposite sign of dispersion characteristic to that of said first optical fiber; and a second dispersion compensating fiber having one end thereof connected to said connecting member and the other end thereof to be connected to an optical receiver and having an opposite sigh of dispersion characteristic to that of said first optical fiber; a total length of said first dispersion compensating fiber and said second dispersion compensating fiber being long enough to compensate the dispersion of said first optical fiber.
Claim 4
Dependent Claim
49 words
An optical communication system according to Claim 1, 2 or 3, wherein the length of each of said first and second dispersion compensating fibers is respectively limited to a range in which a relative intensity noise of the despersion compensating fiber can retain a proportional relationship to the length.
Claim 5
Dependent Claim
21 words
An optical communication system according to Claim 4, wherein said first and second dispersion compensating fibers are of the same length.
Claim 6
Dependent Claim
31 words
An optical communication system according to Claim 1, 2 or 3, wherein said first dispersion compensating fiber is a series connection of a plurality of dispersion compensating fibers through connecting members.
Claim 7
Dependent Claim
59 words
An optical communication system according to Claim 2 or 3, wherein said connecting member is a second optical fiber having a length to sufficiently attenuate a rear scattered light generated in each of said first and second dispersion compensating fibers connected to the opposite ends thereof and has the same dispersion characteristic as that of said first optical fiber.
Claim 8
Dependent Claim
54 words
An optical communication system according to Claim 6, wherein said connecting member is a second optical fiber having a length to sufficiently attenuate a rear scattered light generated in each of said dispersion compensating fibers connected to the opposite ends thereof and has the same dispersion characteristic as that of said first optical fiber.
Claim 9
Dependent Claim
23 words
An optical communication system according to Claim 7 or 8, wherein said second optical fiber is a transmission path for an optical signal.
Claim 10
Dependent Claim
20 words
An optical communication system according to Claim 7 or 8, wherein said second optical fiber is a fiber optical amplifier.
Claim 11
Dependent Claim
19 words
An optical communication system according to Claim 2, 3 or 6, wherein said connecting member is an optical isolator.
Claim 12
Dependent Claim
42 words
An optical communication system according to Claim 2, 3 or 6, wherein said connecting member is an optical coupler having a loss to sufficiently attenuate a rear scattered light generated in each of said first and second dispersion compensating fibers connected thereto.
Claim 13
Dependent Claim
30 words
An optical communication system according to Claim 6, wherein a total length of said plurality of dispersion compensating fibers is equal to the length of said first dispersion compensating fiber.
Claim 14
Dependent Claim
54 words
An optical communication system according to Claim 6, wherein said connecting member is a third optical fiber having a length to sufficiently attenuate a rear scattered light generated in each of said dispersion compensating fibers connected to the opposite ends thereof and has the same dispersion characteristic as that of said first optical fiber.
Claim 15
Dependent Claim
21 words
An optical communication system according to Claim 14, wherein said third optical fiber is a transmission path for an optical signal.
Claim 16
Dependent Claim
18 words
An optical communication system according to Claim 14, wherein said third optical fiber is a fiber optical amplifier.
Claim 17
Dependent Claim
16 words
An optical communication system according to Claim 6, wherein said connecting member is an optical isolator.
Claim 18
Dependent Claim
36 words
An optical communication system according to Claim 6, wherein said connecting member is an optical coupler having a loss to sufficiently attenuate a rear scattered light generated in each of said dispersion compensating fibers connected thereto.
Claim 19
Dependent Claim
54 words
An optical communication system according to Claim 6, wherein said connecting member is a fourth optical fiber having a length to sufficiently attenuate a rear scattered light generated in each of said dispersion compensating fibers connected to the opposite ends thereof and has the same dispersion characteristic as that of said first optical fiber.
Claim 20
Dependent Claim
21 words
An optical communication system according to Claim 19, wherein said fourth optical fiber is a transmission path for an optical signal.
Claim 21
Dependent Claim
17 words
An optical communication system according to Claim 19,wherein said fourth optical fiber is a fiber optical amplifier.
Claim 22
Dependent Claim
16 words
An optical communication system according to Claim 6, wherein said connecting member is an optical isolator.
Claim 23
Dependent Claim
36 words
An optical communication system according to Claim 6, wherein said connecting member is an optical coupler having a loss to sufficiently attenuate a rear scattered light generated in each of said dispersion compensating fibers connected thereto.
References Cited (Backward Citations)
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