CN106094113A - Adjustable optical attenuator - Google Patents
Adjustable optical attenuator Download PDFInfo
- Publication number
- CN106094113A CN106094113A CN201610693639.1A CN201610693639A CN106094113A CN 106094113 A CN106094113 A CN 106094113A CN 201610693639 A CN201610693639 A CN 201610693639A CN 106094113 A CN106094113 A CN 106094113A
- Authority
- CN
- China
- Prior art keywords
- input
- outfan
- light
- beam splitter
- intensity test
- 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.)
- Pending
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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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
- G02B6/266—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator
Abstract
The adjustable optical attenuator that the present invention provides, input beam splitter, outfan beam splitter, input light-intensity test module, outfan light-intensity test module, collimator, beam expanding lens, DMD and control module are set, realize the automatic Attenuation adjustable to outside input light, the beam expanding lens arranged can improve the resolution of the present invention, solves the problem that existing adjustable optical attenuator resolution is low.
Description
Technical field
The present invention relates to wavelength-division multiplex technique, particularly relate to a kind of adjustable optical attenuator.
Background technology
Networks of Fiber Communications is limited to " electronic bottleneck " caused by optical electrical conversion and electrical/optical conversion, the transmission speed of information
Degree is greatly affected, and is unsatisfactory for the communicating requirement of nowadays Large Copacity, distance, two-forty.In optical communication system, variable optical attenuation
Device is one of main optical passive component.Adjustable optical attenuator is the optical signal energy of transmission during dynamically regulation optic communication
Amount, is widely used in wave division multiplex optical network system, for the control of light source channel energy, receptor energy hole, light amplification
Device is gain flattening, channel equalization, and is laying the decay of fibre circuit advance traveling optical signal, determines that the optical signal of output is passing
Exception is there is not after defeated certain distance.But, the resolution of existing adjustable optical attenuator is low, is not suitable for distance, two-forty
Optical transport.
Summary of the invention
The present invention provides adjustable optical attenuator, solves the problem that the resolution of existing adjustable optical attenuator existence is low.
The present invention solves the problems referred to above by the following technical programs:
Adjustable optical attenuator, including input beam splitter, outfan beam splitter, input light-intensity test module, outfan
Light-intensity test module, collimator, beam expanding lens, DMD and control module；
Outside input light inputs to input beam splitter, a road outfan of input beam splitter and collimator input phase
Even, the outfan of described collimator is connected with a road input of DMD through beam expanding lens；Another road of described input beam splitter is defeated
Go out end to be connected with the input of input light-intensity test module, the outfan of described input light-intensity test module and control module
A road input be connected；The outfan of described control module is connected with another road input of DMD；The outfan of described DMD
It is connected with the input of outfan beam splitter；No. one outfan of described outfan beam splitter is connected with external device (ED), described defeated
Another road outfan going out to hold beam splitter is connected with another road input of control module through outfan light-intensity test module.
Further, described beam expanding lens is 5 power beam expansion lens.
Further, described control module is PID controller.
Further, the beam splitting ratio of described input beam splitter is 10:90, and described 10 than part optical signal input extremely input
End light-intensity test module, described 90 input to input collimator than part optical signal.
Further, the beam splitting ratio of described outfan beam splitter is 99:1, and described 99 than part optical signal input extremely output
End light-intensity test module, described 1 inputs to external device (ED) than part optical signal.
Compared with prior art, have a characteristic that
Arrange input beam splitter, outfan beam splitter, input light-intensity test module, outfan light-intensity test module,
Collimator, beam expanding lens, DMD and control module, it is achieved the automatic Attenuation adjustable to outside input light, the beam expanding lens of setting can carry
The resolution of the high present invention, solves the problem that existing adjustable optical attenuator resolution is low.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but the invention is not limited in these embodiments.
Adjustable optical attenuator, including input beam splitter, outfan beam splitter, input light-intensity test module, outfan
Light-intensity test module, collimator, beam expanding lens, DMD and control module；Outside input light input is to input beam splitter, input
No. one outfan of end beam splitter is connected with collimator input, and the outfan of described collimator is through a road of beam expanding lens Yu DMD
Input is connected；Another road outfan of described input beam splitter is connected with the input of input light-intensity test module, institute
One road input of the outfan and control module of stating input light-intensity test module is connected；The outfan of described control module with
Another road input of DMD is connected；The outfan of described DMD is connected with the input of outfan beam splitter；Described outfan divides
Bundle Qi No. mono-outfan is connected with external device (ED), and another road outfan of described outfan beam splitter is through outfan light-intensity test
Module is connected with another road input of control module.
Beam splitter is for being divided into two-beam or multi-beam by light beam, and beam splitter is generally by metal film and deielectric-coating structure
Become.Input beam splitter is split for outside is inputted light, and its beam splitting ratio is 10:90, and described 10 is more defeated than part optical signal
Entering to input light-intensity test module, for input light is carried out light-intensity test, described 90 input to input than part optical signal
Collimator, is used for the optical attenuation that automatically adjusts.Outfan beam splitter light after regulating, decay is split, its
Beam splitting ratio is 99:1, and described 99 input to outfan light-intensity test module than part optical signal, and described 1 inputs extremely than part optical signal
External device (ED).
Input light-intensity test module, for detecting 10 ratio part optical signals of outside input light, detects its light intensity, and will
The light intensity input that it detects is to control module, with the data refer of the light decrement that adjusts.Input light-intensity test module
Converting optical signals to the signal of telecommunication, and be amplified, filter, after analog digital conversion, become digital signal, input is to control module
In.99 ratio part optical signals for detecting output light of outfan light-intensity test module, detect its light intensity, and are detected
Light intensity input to control module, with the data refer adjusting light decrement.Control module is according to input light-intensity test
The light intensity signal that module and outfan light-intensity test module detect, provides control signal, and control DMD, will according to control instruction
The optical signal of beam expanding lens output carries out optical attenuation, then is exported the 1 of output light to outward than part optical signal by outfan beam splitter
Part device.
Collimator is C-lens optical fiber collimator, for profile of optic fibre is placed in the focal point of collimator so that light obtains
Collimation, near focal point fine tuning fiber end face position, obtains required operating distance, according to operating distance, lists from fiber end face
Paraxial rays transmission matrix to output beam beam waist position.C-lens optical fiber collimator has that price is low, operating distance length, insert
Enter little advantage is lost.
Beam expanding lens is used for changing laser beam spot sizes and the angle of divergence, and the Gaussian beam of C-Lens collimator outgoing is incident to expand
Shu Jing, increases and incides the spot radius on DMD, and then improves the resolution of system.The present invention uses by two standard lens
The 5 times of collimator and extender mirrors combined, the Gaussian beam incidence DMD after expanding, make the light merit being distributed on each effective micro mirror
Rate reduces, and then the luminous power that each effective micro mirror controls reduces, and the impact of system attenuation amount is reduced by its deflection, improves point
Resolution.
DMD is DMD, for the one of photoswitch, utilizes rotating mirror to realize the folding of photoswitch, opening and closing
Time is the longest, for musec order.Light is by, after beam expanding lens, being incident to the reflecting optics of DMD, and the when that DMD opening, light can pass through
Symmetrical light path enters into outfan beam splitter, and when DMD closes when, i.e. the reflecting mirror of DMD produces a little rotation, light warp
After crossing reflection, it is impossible to enter the symmetrical other end, the most just reach the effect that photoswitch is closed.
Control module is PID controller, and PID controller is to carry out bias adjustment according to PID control principle, so that controlled
The actual value of variable is consistent with the predetermined value of technological requirement.PID controller is by proportional unit, integral unit and differentiation element group
Become, by the regulation of the parameter of three unit is realized control, Gather and input end light-intensity test module and outfan light-intensity test
The light intensity data of module, compares light intensity data and reference value, calculates, and obtains new control signal, controls opening of DMD
Close, regulate light decrement, it is achieved the light of the present invention is automatically adjusted.
Claims (5)
1. adjustable optical attenuator, it is characterised in that:
Including input beam splitter, outfan beam splitter, input light-intensity test module, outfan light-intensity test module, collimation
Device, beam expanding lens, DMD and control module；
Outside input light inputs to input beam splitter, and a road outfan of input beam splitter is connected with collimator input,
The outfan of described collimator is connected with a road input of DMD through beam expanding lens；Another road output of described input beam splitter
End is connected with the input of input light-intensity test module, the outfan of described input light-intensity test module and control module
One road input is connected；The outfan of described control module is connected with another road input of DMD；The outfan of described DMD with
The input of outfan beam splitter is connected；No. one outfan of described outfan beam splitter is connected with external device (ED), described output
Another road outfan of end beam splitter is connected with another road input of control module through outfan light-intensity test module.
Adjustable optical attenuator the most according to claim 1, it is characterised in that: described beam expanding lens is 5 power beam expansion lens.
Adjustable optical attenuator the most according to claim 1, it is characterised in that: described control module is PID controller.
Adjustable optical attenuator the most according to claim 1, it is characterised in that: the beam splitting ratio of described input beam splitter is
10:90, described 10 input to input light-intensity test module than part optical signal, and described 90 is more accurate to input than the input of part optical signal
Straight device.
Adjustable optical attenuator the most according to claim 1, it is characterised in that: the beam splitting ratio of described outfan beam splitter is
99:1, described 99 input to outfan light-intensity test module than part optical signal, and described 1 inputs to external device (ED) than part optical signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693639.1A CN106094113A (en) | 2016-08-18 | 2016-08-18 | Adjustable optical attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693639.1A CN106094113A (en) | 2016-08-18 | 2016-08-18 | Adjustable optical attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106094113A true CN106094113A (en) | 2016-11-09 |
Family
ID=58069724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610693639.1A Pending CN106094113A (en) | 2016-08-18 | 2016-08-18 | Adjustable optical attenuator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030026582A1 (en) * | 2001-08-02 | 2003-02-06 | In' T Hout Sebastiaan Roderick | Variable optical attenuator and method for improved linearity of optical signal attenuation versus actuation signal |
| CN101363944A (en) * | 2007-08-07 | 2009-02-11 | 艾能斯光纤产品公司 | apparatus for attenuating a light beam in optical fiber transmission |
| CN101802669A (en) * | 2007-07-23 | 2010-08-11 | 尼斯迪卡有限公司 | Multiple function digital optical switch |
| CN102135647A (en) * | 2011-02-21 | 2011-07-27 | 华为技术有限公司 | Optical switch system and signal light feedback control method |
| CN202126519U (en) * | 2011-06-16 | 2012-01-25 | 安徽问天量子科技股份有限公司 | Light attenuation system |
| CN204855860U (en) * | 2015-06-30 | 2015-12-09 | 北极光电(深圳)有限公司 | But adjustable optical attenuator of plug and control |
-
2016
- 2016-08-18 CN CN201610693639.1A patent/CN106094113A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030026582A1 (en) * | 2001-08-02 | 2003-02-06 | In' T Hout Sebastiaan Roderick | Variable optical attenuator and method for improved linearity of optical signal attenuation versus actuation signal |
| CN101802669A (en) * | 2007-07-23 | 2010-08-11 | 尼斯迪卡有限公司 | Multiple function digital optical switch |
| CN101363944A (en) * | 2007-08-07 | 2009-02-11 | 艾能斯光纤产品公司 | apparatus for attenuating a light beam in optical fiber transmission |
| CN102135647A (en) * | 2011-02-21 | 2011-07-27 | 华为技术有限公司 | Optical switch system and signal light feedback control method |
| CN202126519U (en) * | 2011-06-16 | 2012-01-25 | 安徽问天量子科技股份有限公司 | Light attenuation system |
| CN204855860U (en) * | 2015-06-30 | 2015-12-09 | 北极光电(深圳)有限公司 | But adjustable optical attenuator of plug and control |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |