CN201359648Y - Multi-wavelength selecting switch - Google Patents
Multi-wavelength selecting switch Download PDFInfo
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- CN201359648Y CN201359648Y CNU2009201368922U CN200920136892U CN201359648Y CN 201359648 Y CN201359648 Y CN 201359648Y CN U2009201368922 U CNU2009201368922 U CN U2009201368922U CN 200920136892 U CN200920136892 U CN 200920136892U CN 201359648 Y CN201359648 Y CN 201359648Y
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Abstract
The utility model relates to the field of laser and optics, in particular to a wavelength selecting switch. The multi-path wavelength selecting switch adopts a group of WDM membranes, a 1/4 wave plate, a Work-off crystal or a PBS prism group to form a WDM shunt structure with a plurality of times of reflection, simultaneously adopts a 1/4 wave plate pair, a Faraday rotary piece and a pyramid reflective prism with the liquid crystal optical axes being orthorhombic with one another, the Work-off crystal or the PBS prism leads light with different wavelength and transmitted from WDM to selectively enter or return, combine and enter different receiving channels. By adopting the technical proposal, the utility model provides a novel and simple multi-path wavelength selecting switch structure which has lower insertion loss.
Description
Technical field
The utility model relates to laser and optical field, relates in particular to wavelength-selective switches.
Background technology
Wavelength-selective switches (WSS) is an important optical element of wavelength division multiplexer, the core group that simultaneously also is structure optical network mesh network and restructural optical add-drop multiplexer (ROADM) becomes device, can select wavelength-division multiplex (WDM) light signal imported arbitrarily, and this signal is outputed to any one output port.In order to realize this function, devices such as the employing liquid crystal on silicon that has, MEMS micro mirror array or planar lightwave circuit are realized, but general such scheme is often brought bigger insertion loss and undue complicated structure.
The utility model content
The utility model proposes a kind of novel simpler structure realizes.
The technical solution of the utility model is as follows:
Multichannel wavelength-selective switches of the present utility model comprises WDM shunt structure and wavelength channel choice structure; Described WDM shunt structure is made of WDM diaphragm, quarter wave plate, Work-off crystal or PBS prism group, described Work-off crystal or PBS prism group are arranged at each collimating apparatus emergent light place, road, Work-off crystal after described each road collimating apparatus is provided with 1/2 wave plate, after described quarter wave plate was arranged at Work-off crystal or PBS prism group, described WDM diaphragm arrangement was behind quarter wave plate; Described wavelength channel choice structure constitutes, faraday's revolving fragment, Work-off crystal or PBS prism group and pyramid reflecting prism by being arranged in the mutually orthogonal quarter wave plate of optical axis on each road optical axis.
Further, each road collimator position is corresponding to the Work-off crystal of described wavelength channel choice structure or each road exit channel of PBS prism group.
Further, the quarter wave plate of described wavelength channel choice structure is right to being the liquid crystal wave plate, and is connected with liquid crystal conversion driver module.
The utility model adopts as above technical scheme, is a kind of novel simple multichannel wavelength-selective switches structure, has lower insertion loss.
Description of drawings
Fig. 1 (a) is a structural representation of the present utility model;
Fig. 1 (b) is a structure vertical view of the present utility model.
Embodiment
Existing accompanying drawings and embodiment further specify the utility model.
Multichannel wavelength-selective switches principle of the present utility model shown in Fig. 1 (a), Fig. 1 (b) is preferably used the embodiment explanation of 1X4 road wavelength-selective switches here.
Fig. 1 (a) is the front view of the utility model structure, successively selects multi-wavelength light by the Work-off crystal, and light beam utilizes first Work-off crystal to close bundle after arriving different aspects again, and turns back to the collimating apparatus of dedicated tunnel.
Consult Fig. 1 (a), shown in Fig. 1 (b), structure of the present utility model comprises: circulator 114, collimating apparatus 1131,1132,1133,1134, Work-off crystal array 112,1/2 wave plate arrays 111, Work-off crystal 102, quarter wave plate 103A, reflectance coating S1, WDM diaphragm 1041,1042 ..., 104M, optical axis and work-off crystal 102 optical directions are 45 ° quarter wave plate 103B, the liquid crystal wave plate 1051A of optical axis and quarter wave plate 103 quadratures, 1052A, ..., 105MA, the liquid crystal wave plate 1051B that optical axis and quarter wave plate 103 are parallel, 1052B ..., 105MB, Work-off crystal 1061A, 1061B, 1061C, corner cube reflector 1071A, 1072A, ..., 107MA, 1071B, 1071C, 1071D ..., 107MD, magneto-optical crystal 1081A, 1081B, quarter wave plate 110.
The incident multi-wavelength light enters Work-off crystal 102 through collimation and after being converted to linearly polarized light, passes through WDM diaphragm 1041, one of them wavelength X 1 transmittance with rotatory polarization behind quarter wave plate 103.When entering liquid crystal wave plate 1051A, during 1051B, if wish that λ 1 light directly returns, then liquid crystal wave plate 1051B work (being in quarter wave plate), liquid crystal wave plate 1051A do not work (full-wave plate state), then quarter wave plate 103 synthesizes 1/2 wave plate with liquid crystal wave plate 1051B, wavelength X 1 light polarization direction half-twist, enter Work-off crystal 1061A, because λ 1 polarisation of light direction is vertical with the optical surface of Work-off crystal 1061A, its transmission direction is constant, enter corner cube reflector 1071A and, return collimating apparatus 1131 along original optical path by total reflection, and through circulator 114 output light path systems.
If desired wavelength λ 1 light enters other passages again, then liquid crystal wave plate 1051A work, liquid crystal wave plate 1051B does not work, then quarter wave plate 103 synthesizes full-wave plate (optical axis is mutually orthogonal) with liquid crystal wave plate 1051A, then constant with λ 1 light polarization direction, 1061A is raised to last layer by the Work-off crystal, here be placed with the liquid crystal wave plate 1052A and the 1052B of 45 ° of Faraday rotator 1081A and two λ/2, its optical axis becomes with the z axle respectively+and 22.5 ° and-22.5 °, liquid crystal wave plate 1052A, liquid crystal wave plate 1052B can produce the light beam on parallel or vertical Work-off crystal 1061B surface, polarization direction respectively with magneto-optical crystal 1081A mating reaction.
When incident light polarization direction and Work-off crystal 1061B Surface Vertical, light beam does not rise after entering Work-off crystal 1061B, and by corner cube reflector 1071B total reflection, once more by two λ/2 liquid crystal wave plates and faraday's revolving fragment, nonreciprocity because of faraday's revolving fragment, then keep the polarization direction constant once more by Work-off crystal 1061A, again by the identical fixedly quarter wave plate 1091A of optical axis and quarter wave plate 103, the polarization direction half-twist enters the Work-off crystal 102 final collimating apparatuss 1132 that arrive again; When the incident light polarization direction was parallel with Work-off crystal 1061B surface, light beam was by Work-off crystal 1061B, and transmission direction deflects, and is raised to last layer.
In like manner can make light beam be upgraded to the different light paths passage one by one, repeat no more in this.
Shown in Fig. 1 (b) for being the vertical view of the utility model structure, adopt Work-off crystal both sides to add quarter wave plate and light beam moved on one group of WDM diaphragm automatically by reflection repeatedly, with incident light by wavelength separate, transmission.Multichannel wavelength signals light is through collimation and after being converted to linearly polarized light, enter Work-off crystal 102, behind quarter wave plate 103B, pass through WDM diaphragm 1041 with rotatory polarization, wherein wavelength X 1 transmittance, all the other wavelength light λ i are reflected, once more by quarter wave plate 103B rear polarizer direction half-twist, drop to down one deck after entering Work-off crystal 102, by rete S1 reflection back twice process quarter wave plate 103A, the polarization direction is half-twist once more, repeatedly reflection in Work-off crystal 102 again, or return starting point, or subordinate's port of starting point, light beam is moved on one group of WDM diaphragm automatically, incident light is separated by wavelength, transmission.
After wavelength X 1 light enters liquid crystal wave plate 1051A and 1051B, successively select, utilize first Work-off crystal to close bundle again after the arrival different aspects, and return the collimating apparatus of dedicated tunnel according to structure shown in Fig. 1 (a).
The utility model adopts the corner cube reflector folded light beam, can make each light beam return incident light by original optical path, and the angular deflection of generation is repeatedly reflected in cancellation.
The utility model also can add the WDM diaphragm simultaneously on work-off crystal 102 both sides, to reduce the order of reflection of light beam.
In the utility model, be 0.05dB if the liquid crystal wave plate inserts loss, it is 0.05dB that Faraday rotator inserts loss, collimating apparatus is inserted loss 0.5dB, and reflectivity is higher, then insert loss and can ignore, and the insertion loss of 1X4 (40 tunnel) system totally may be between 1dB～2dB.
In like manner, the utility model can adopt Fig. 1 (a) and (b) light path can constitute 1 * n multi-wavelength selective switch.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection domain of the present utility model.
Claims (3)
1. the multichannel wavelength-selective switches is characterized in that: comprise WDM shunt structure and wavelength channel choice structure; Described WDM shunt structure is made of WDM diaphragm, quarter wave plate, Work-off crystal or PBS prism group, described Work-off crystal or PBS prism group are arranged at each collimating apparatus emergent light place, road, Work-off crystal after described each road collimating apparatus is provided with 1/2 wave plate, after described quarter wave plate was arranged at Work-off crystal or PBS prism group, described WDM diaphragm arrangement was behind quarter wave plate; Described wavelength channel choice structure constitutes, faraday's revolving fragment, Work-off crystal or PBS prism group and pyramid reflecting prism by being arranged in the mutually orthogonal quarter wave plate of optical axis on each road optical axis.
2. multichannel wavelength-selective switches as claimed in claim 1 is characterized in that: each road collimator position is corresponding to the Work-off crystal of described wavelength channel choice structure or each road exit channel of PBS prism group.
3. multichannel wavelength-selective switches as claimed in claim 1 is characterized in that: the quarter wave plate of described wavelength channel choice structure is right to being the liquid crystal wave plate, and is connected with liquid crystal conversion driver module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201368922U CN201359648Y (en) | 2009-02-25 | 2009-02-25 | Multi-wavelength selecting switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201368922U CN201359648Y (en) | 2009-02-25 | 2009-02-25 | Multi-wavelength selecting switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201359648Y true CN201359648Y (en) | 2009-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201368922U Expired - Fee Related CN201359648Y (en) | 2009-02-25 | 2009-02-25 | Multi-wavelength selecting switch |
Country Status (1)
| Country | Link |
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| CN (1) | CN201359648Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808293A (en) * | 2014-01-29 | 2015-07-29 | 奥普林克通信公司 | 2x2 Wavelength Selective Switch Array |
| CN105182473A (en) * | 2015-09-18 | 2015-12-23 | 北京邮电大学 | Wavelength selecting optical blocker |
| CN111025739A (en) * | 2019-12-25 | 2020-04-17 | 昂纳信息技术（深圳）有限公司 | Switching unit and wavelength selective switch |
-
2009
- 2009-02-25 CN CNU2009201368922U patent/CN201359648Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808293A (en) * | 2014-01-29 | 2015-07-29 | 奥普林克通信公司 | 2x2 Wavelength Selective Switch Array |
| CN104808293B (en) * | 2014-01-29 | 2019-11-01 | 奥普林克通信公司 | 2x2 wavelength-selective switches array |
| CN105182473A (en) * | 2015-09-18 | 2015-12-23 | 北京邮电大学 | Wavelength selecting optical blocker |
| CN105182473B (en) * | 2015-09-18 | 2018-11-09 | 北京邮电大学 | A kind of wavelength selective optical disabler |
| CN111025739A (en) * | 2019-12-25 | 2020-04-17 | 昂纳信息技术（深圳）有限公司 | Switching unit and wavelength selective switch |
| CN111025739B (en) * | 2019-12-25 | 2022-12-09 | 昂纳信息技术（深圳）有限公司 | Switching unit and wavelength selection switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091209 Termination date: 20130225 |