DD231141A1 - METHOD FOR IMPROVING THE SPECTRAL DAMPING PROPERTIES OF LIGHT GUIDES - Google Patents
METHOD FOR IMPROVING THE SPECTRAL DAMPING PROPERTIES OF LIGHT GUIDES Download PDFInfo
- Publication number
- DD231141A1 DD231141A1 DD84263823A DD26382384A DD231141A1 DD 231141 A1 DD231141 A1 DD 231141A1 DD 84263823 A DD84263823 A DD 84263823A DD 26382384 A DD26382384 A DD 26382384A DD 231141 A1 DD231141 A1 DD 231141A1
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- optical fibers
- improving
- radiation
- damping properties
- properties
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000003595 spectral effect Effects 0.000 title claims abstract description 7
- 238000013016 damping Methods 0.000 title claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 230000005855 radiation Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 abstract description 2
- 230000005865 ionizing radiation Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910052805 deuterium Inorganic materials 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 208000018459 dissociative disease Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44382—Means specially adapted for strengthening or protecting the cables the means comprising hydrogen absorbing materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Die Erfindung betrifft ein Verfahren, mit dem die Daempfungseigenschaften von Lichtleitern verbessert werden koennen. Die Verbesserung der Eigenschaften der Lichtleiter erfolgt auf dem Wege der Verschiebung von Lage und Hoehe von Absorptionsspitzen im Daempfungsspektrum, womit die spektralen Daempfungseigenschaften bei der Arbeitswellenlaenge verbessert werden. Erfindungsgemaess wird diese Aufgabe durch Beaufschlagung mit ionisierender Strahlung, vorzugsweise Neutronenstrahlung, geloest.The invention relates to a method with which the damping properties of optical fibers can be improved. The improvement of the properties of the optical fibers is achieved by shifting the position and height of absorption peaks in the dithering spectrum, thus improving the spectral attenuation properties at the working wavelength. According to the invention, this object is achieved by exposure to ionizing radiation, preferably neutron radiation.
Description
Erfindungsbeschreibung TitelDescription of the invention Title
Verfahren zur "Verbesserung der spektralen Dämpfungseigenschaften von Lichtleitern.Method for "improving the spectral attenuation properties of optical fibers.
Die Erfindung betrifft ein Verfahren, mit dem Dämpfungseigenschaften von Lichtleitern verbessert werden können. Das vorgeschlagene Verfahren ist sowohl beim Herstellungsprozeß als auch danach möglich.The invention relates to a method with which damping properties of optical fibers can be improved. The proposed method is possible both during the manufacturing process and afterwards.
Für dämpfungsbegrenzte Lichtleitersysterae ist die Dämpfung der eingesetzten Lichtleiter eine wesentliche Kenngröße. Die Herstellung dämpfungsarmer Lichtleiter wird von den Produzenten angestrebt.For attenuation-limited Lichtleitersysterae the attenuation of the optical fibers used is an essential parameter. The production of low-attenuation light guides is sought by the producers.
Die Dämpfung längs eines Lichtleiters wird von verschiedenen Faktoren beeinflußt. Eine wesentliche Ursache sind chemische Verunreinigungen im Glas. Dazu sind während des Herstellungsprozesses eine große Zahl technologischer Verfahren zur chemischen Reinigung bzw. zur Erhaltung der Reinheit bekannt.The attenuation along an optical fiber is influenced by various factors. A major cause is chemical contamination in the glass. For this purpose, during the manufacturing process, a large number of technological processes for chemical cleaning or to maintain the purity known.
Eine "besondere Rolle spielen OH-Gruppen, die zu Absorptions· spitzen im Spektrum führen. Für diese ist außer der höchstmöglichen Reinsthaltung bei der Herstellung ein Verfahren zur Reduzierung der Wirksamkeit der OH-Gruppen bekannt. Entsprechend dem Patent DE 31 04 041 werden die Wasserstoffatome der OH-Verbindungen durch Deuterium ersetzt. Dies geschieht durch Dissoziationsreaktionen· Mit dem Ersatz der Wasserstoffatome verändert sich Lage und Höhe der Absorptionsspitzen und es entstehen bei zweckmäßiger Arbeitswellenlänge günstigere spektrale Dämfpungen.OH groups which lead to absorption peaks in the spectrum play a special role, for which, in addition to the highest possible purity during production, a process for reducing the effectiveness of the OH groups is known.According to the patent DE 31 04 041, the hydrogen atoms This is done by dissociation reactions · With the replacement of the hydrogen atoms, the position and height of the absorption peaks change and favorable spectral attenuations arise at an appropriate operating wavelength.
Ziel der Erfindung / Object of the invention /
Der Erfindung liegt die Aufgabe zugrunde, die spektralen Dämpfungseigenschaften von Lichtleitern zu verbessern. Das zu entwickelnde Verfahren soll sich sowohl für den Produktionsprozeß, als auch zur Nachbehandlung eignen und einen möglichst geringen Aufwand erfordern. Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß der Lichtleiter mit Kernstrahlung beaufschlagt wird. Die Anwendung der Kernreaktion stellt den wesentlichen Unterschied zu den bisherigen Verfahren dar.The invention has for its object to improve the spectral attenuation properties of optical fibers. The process to be developed should be suitable both for the production process, as well as for the aftertreatment and require the least possible effort. According to the invention the object is achieved in that the optical fiber is exposed to nuclear radiation. The application of the nuclear reaction represents the essential difference to the previous methods.
Die Beeinflussung von Lichtleitern durch Kernstrahlung wurde im Zusammenhang mit dem Einsatz in Kernkraftwerken und für militärische Anlagen vielfach untersucht. Kernstrahlungen führen, bei falscher Applikation und bei ungünstigen Dotierungen, zur Verschlechterung der Dämpfungseigenschaften und wurden bisher vorrangig unter diesem Gesichtspunkt behandelt.The influence of light radiation by nuclear radiation has been extensively studied in connection with use in nuclear power plants and for military installations. Core radiation leads, in case of incorrect application and unfavorable doping, to the deterioration of the damping properties and have been treated with priority from this point of view.
(Sigel, G. H. Fitzer Transmission Losses in High Radiation Fields, Proceedings of the IEEE, Vol. 68, IiO 10 October 1980 S. 1236 - 1240)(Sigel, G.H. Fitzz Transmission Losses in High Radiation Fields, Proceedings of the IEEE, Vol. 68, 10 October 1980 p. 1236-1240)
Außerdem wird in verschiedenen Publikationen die Eignung als Sensor für Kernstrahlung erörtert. Demgegenüber tritt bei zweckmäßiger Bestrahlung eine Verbesserung der spektralen Dämpfungseigenschaften auf.In addition, the suitability as a sensor for nuclear radiation is discussed in various publications. On the other hand, an improvement in the spectral attenuation properties occurs on expedient irradiation.
Durch genau dosierte Bestrahlung mit vorzugsweise Neutronen geeigneter Energie wird die Umwandlung des Wasserstoffes in Deuterium erreicht.By precisely metered irradiation with preferably neutrons of suitable energy, the conversion of hydrogen into deuterium is achieved.
Diese Reaktion führt zu analogen Resultaten wie sie im Patent DE 31 04 041 mit wesentlich größerem Aufwand erzielt wurden.This reaction leads to analogous results as were achieved in the patent DE 31 04 041 with much greater effort.
Mit dem vorgeschlagenen Verfahren wurden bei 200 m Stufenindexfasem Dämpfungsverringerungen von einigen Prozent erreicht.With the proposed method, attenuation reductions of a few percent were achieved for 200 m step index fibers.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD84263823A DD231141A1 (en) | 1984-06-05 | 1984-06-05 | METHOD FOR IMPROVING THE SPECTRAL DAMPING PROPERTIES OF LIGHT GUIDES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD84263823A DD231141A1 (en) | 1984-06-05 | 1984-06-05 | METHOD FOR IMPROVING THE SPECTRAL DAMPING PROPERTIES OF LIGHT GUIDES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD231141A1 true DD231141A1 (en) | 1985-12-18 |
Family
ID=5557677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD84263823A DD231141A1 (en) | 1984-06-05 | 1984-06-05 | METHOD FOR IMPROVING THE SPECTRAL DAMPING PROPERTIES OF LIGHT GUIDES |
Country Status (1)
| Country | Link |
|---|---|
| DD (1) | DD231141A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002006868A3 (en) * | 2000-07-14 | 2003-05-22 | Tycom Us Inc | Fiber optic cable with minimized long term signal attenuation and method of production thereof |
-
1984
- 1984-06-05 DD DD84263823A patent/DD231141A1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002006868A3 (en) * | 2000-07-14 | 2003-05-22 | Tycom Us Inc | Fiber optic cable with minimized long term signal attenuation and method of production thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| ENJ | Ceased due to non-payment of renewal fee |