CN85103110A - Optical element - Google Patents
Optical element Download PDFInfo
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- CN85103110A CN85103110A CN 85103110 CN85103110A CN85103110A CN 85103110 A CN85103110 A CN 85103110A CN 85103110 CN85103110 CN 85103110 CN 85103110 A CN85103110 A CN 85103110A CN 85103110 A CN85103110 A CN 85103110A
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- China
- Prior art keywords
- signal
- optical fiber
- polarization
- induced birefringence
- optical
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- 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.)
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Abstract
A kind of optical element keeps the constant optical fiber of light polarization by one section and forms to device of its emission pumping signal for induced birefringence in this optical fiber.Double refraction amount changes with excitation signal strength.When this optical fiber is launched a polarization signal, this signal is changed by induced birefringence.This element plays on-off action under extremity, and the polarization signal of permission or prevention transmission passes through optical fiber.This optical fiber and signal wavelength can make the polarization signal that transmitted obtain amplifying (gain).The optical switch of two polyphones can be formed an optics AND gate.
Description
The present invention is relevant with optical element, and is special relevant with optical switch, but is not limited only to this.
One aspect of the present invention provides an optical element, it has: one section keeps the constant optical fiber of light polarization, and be used for to optical fiber emission pumping signal and therefore at the device of optical fiber induced birefringence, the amount of induced birefringence changes with excitation signal strength, and the wherein used polarization signal to the optical fiber emission depends on induced birefringence and changes.
Another aspect of the present invention provides a kind of method of controlling polarized light signal, it comprises: keep the constant optical fiber emission polarization signal of light polarization to one section, thereby utilization is to the induced birefringence in optical fiber of optical fiber emission pumping signal, change the induced birefringence amount by changing excitation signal strength, the polarization signal of transmission changes according to the effect of induced birefringence.
With regard to the optical switch that has proposed, can an electrooptic block be set by the space between two sections optical fiber ends and simply make.The electric field that dependence is added on this electrooptical material changes the transparency of this material, thereby a light signal that is transmitted into one section optical fiber under extreme conditions can be received or refusal by another section optical fiber, and this light signal is connected or judgement.
Yet we have found can realize the open and close to light signal in the single fiber element by optically causing Kerr effect (electrooptical effect).
On the other hand, optical fiber can make the plane of polarization rotation of a light signal in general, but the optical fiber that also has can keep the plane of polarization of light signal of emission inside it constant, such as, the optical fiber with oval shaped core.If except launching a wavelength to the constant optical fiber of general maintenance light polarization is λ
SLight signal beyond, also launching another wavelength to this section optical fiber simultaneously is λ
PLight signal (pumping signal), yet change excitation signal strength, the induced birefringence amount also correspondingly changes.Like this, polarization signal changes degree of transmission according to the induced birefringence effect, under extreme conditions fully passes through or blocking-up, promptly turns on and off.
(No., sequence number) (K, C, Byron-5) and No. (No., sequence number) (K, C, Byron-6) discussed as we being submitted simultaneously pendent patented claim No., depends on pumping signal power, signal wavelength lambda
SAnd λ
PThe interval, and be λ to wavelength by Stimulated Raman emission
SThe optics of signal amplify, one to length, loss and material all suitably the fiber amplifier of design can reach.Here require wavelength X
SWith one or more wavelength X that start from
PStokes shift corresponding.Therefore can install an optical element, by causing on the optics that Kerr effect realizes the switch to signal, when this element switches, launch the amplification that can realize by Stimulated Raman in this element light signal.
Can make optical logic element by the simple on-off of optical switch as mentioned above.Such as, two such switch series link up can form an AND gate, each switch has pumping signal separately, if corresponding excitation signal strength makes two corresponding switches all be in " conducting " (ON) state, a certain light signal that imports first (switch) in two switches so into only again second (switch) from two switches spread out of.
Other optical elements also can be realized for the basis by this optical element.For example, can make a kind of optical pulse generator by suitably controlling excitation signal strength.
Claims (7)
1, a kind of optical element is characterized in that this element has: one section keeps the constant optical fiber of light polarization and is used for to this optical fiber emission pumping signal, and makes the device of its induced birefringence thus; The induced birefringence amount changes with excitation signal strength, and the wherein used polarization signal to this optical fiber emission depends on induced birefringence and changes.
2, a kind ofly be configured to a kind of optical switch by claim 1 desired optical element, it is characterized in that: the intensity of first pumping signal is equivalent to the connection value by this fibre-optic polarization signal, and the intensity of second pumping signal is equivalent to the shutoff value by this fibre-optic polarization signal.
3, a kind of by claim 2 desired optical elements, it is characterized in that: wherein optical fiber is such one section; The wavelength of polarization signal is equivalent to start from one or more Stokes shifts of pumping signal wavelength, also this polarization signal is amplified during transmission.
4, a kind of by claim 2 desired optical elements, it is characterized in that: this optical element and another such element are contacted, and each described element has pumping signal separately, thereby constitute a kind of AND gate of optics.
5, a kind of by claim 1 desired optical element, it is characterized in that: it is in fact as described in the claim 1.
6, a kind of method of controlling polarized light signal, it is characterized in that: this method is: keep the constant optical fiber emission polarization signal of light polarization to one section, launch a pumping signal so that induced birefringence therein to optical fiber, utilize the change excitation signal strength to make the induced birefringence quantitative changeization, the polarization signal that is transmitted changes according to the effect of induced birefringence.
7, a kind of by claim 6 desired methods, it is characterized in that: wherein first excitation signal strength is equivalent to the connection value by fibre-optic polarization signal, and second excitation signal strength is equivalent to the shutoff value by this fibre-optic polarization signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103110 CN85103110A (en) | 1985-04-24 | 1985-04-24 | Optical element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103110 CN85103110A (en) | 1985-04-24 | 1985-04-24 | Optical element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85103110A true CN85103110A (en) | 1986-10-22 |
Family
ID=4792974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85103110 Pending CN85103110A (en) | 1985-04-24 | 1985-04-24 | Optical element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85103110A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401120C (en) * | 2004-08-19 | 2008-07-09 | 冲电气工业株式会社 | Optical switch |
| CN101505942A (en) * | 2006-08-30 | 2009-08-12 | 柯尼卡美能达精密光学株式会社 | Optical element forming apparatus |
| CN101840126A (en) * | 2010-04-21 | 2010-09-22 | 中国科学院半导体研究所 | Silicon-based cascaded resonant cavity all-optical logical AND gate structure capable of reducing power consumption |
-
1985
- 1985-04-24 CN CN 85103110 patent/CN85103110A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401120C (en) * | 2004-08-19 | 2008-07-09 | 冲电气工业株式会社 | Optical switch |
| CN101505942A (en) * | 2006-08-30 | 2009-08-12 | 柯尼卡美能达精密光学株式会社 | Optical element forming apparatus |
| CN101840126A (en) * | 2010-04-21 | 2010-09-22 | 中国科学院半导体研究所 | Silicon-based cascaded resonant cavity all-optical logical AND gate structure capable of reducing power consumption |
| CN101840126B (en) * | 2010-04-21 | 2012-05-23 | 中国科学院半导体研究所 | Silicon-based cascaded resonant cavity all-optical logical AND gate structure capable of reducing power consumption |
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Legal Events
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| C13 | Decision | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |