CN203930117U - The optical attenuator that return loss is high - Google Patents
The optical attenuator that return loss is high Download PDFInfo
- Publication number
- CN203930117U CN203930117U CN201420374499.8U CN201420374499U CN203930117U CN 203930117 U CN203930117 U CN 203930117U CN 201420374499 U CN201420374499 U CN 201420374499U CN 203930117 U CN203930117 U CN 203930117U
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- China
- Prior art keywords
- optical fibre
- damping mechanism
- return loss
- lens
- insertion tube
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- Optical Couplings Of Light Guides (AREA)
- Liquid Crystal (AREA)
Abstract
The utility model discloses the optical attenuator that return loss is high, comprise connector body, insertion tube, input optical fibre, the joints of optical fibre, lens, output optical fibre and damping mechanism, described insertion tube level is crossed connector body, input optical fibre and output optical fibre insert in insertion tube from the both ends horizontal of insertion tube respectively, between input optical fibre and output optical fibre, damping mechanism is set, between input optical fibre and damping mechanism, be connected successively the joints of optical fibre and lens, between damping mechanism and output optical fibre, connect successively lens and the joints of optical fibre; Described damping mechanism comprises liquid crystal layer, is positioned at the transparency electrode on liquid crystal layer both sides, glass substrate and beam splitting element, at the adjacent glass substrate in the outside of every transparency electrode, at the adjacent beam splitting element in the outside of every glass substrate.The utility model, by said structure, by beam splitting element and specific assembly structure, has improved the return loss of whole device, has widened temperature usable range and spectral range.
Description
Technical field
The utility model relates to the communications field, is specifically related to the optical attenuator that return loss is high.
Background technology
An important indicator that affects system performance in optical device parameter is return loss.The reflection that return loss is caused by each element and air refraction string mismatch causes.Return light is well-known on the impact of optical network system.The return loss of optical attenuator refers to the ratio of the luminous energy reflecting along input path in the luminous energy that incides in optical attenuator and attenuator.The return loss of high-performance optical attenuator is more than 45dB.In fact due to the reason of the aspects such as technique, the loss of attenuator actual ghosts also has certain gap from theoretical value, when not reducing whole circuit return loss, in respective lines, how to make high return loss attenuation device, also require optical attenuator to there is wider temperature usable range and spectral range is the direction that we make great efforts simultaneously.
Utility model content
The utility model has overcome the deficiencies in the prior art, and the optical attenuator that return loss is high is provided, and by beam splitting element and specific assembly structure, has improved the return loss of whole device, has widened temperature usable range and spectral range.
For solving above-mentioned technical matters, the utility model is by the following technical solutions: the optical attenuator that return loss is high, comprise connector body, insertion tube, input optical fibre, the joints of optical fibre, lens, output optical fibre and damping mechanism, described insertion tube level is crossed connector body, input optical fibre and output optical fibre insert in insertion tube from the both ends horizontal of insertion tube respectively, between input optical fibre and output optical fibre, damping mechanism is set, between input optical fibre and damping mechanism, be connected successively the joints of optical fibre and lens, between damping mechanism and output optical fibre, connect successively lens and the joints of optical fibre, described damping mechanism comprises liquid crystal layer, is positioned at the transparency electrode on liquid crystal layer both sides, glass substrate and beam splitting element, at the adjacent glass substrate in the outside of every transparency electrode, at the adjacent beam splitting element in the outside of every glass substrate.The antireflection setting that liquid crystal layer, beam splitting element are appropriate and the assembly structure of damping mechanism uniqueness, improved the return loss of whole device, widened temperature usable range and spectral range.
Described lens are inclined-plane lens.Reflected light goes out input path by the angle segregation with certain, has improved the return loss in loop.
Described beam splitting element is polarising beam splitter.Be convenient to input optical fibre incident light to be divided into the orthogonal two bundle polarized lights of plane of polarization.
Described input optical fibre and output optical fibre are parallel to each other.
Described damping mechanism upper and lower surface all arranges compact heap.
Compared with prior art, the beneficial effects of the utility model are:
1, the appropriate antireflection setting of liquid crystal layer, beam splitting element and the assembly structure of damping mechanism uniqueness, improved the return loss of whole device, widened temperature usable range and spectral range.
2, the lens of this device are inclined-plane lens, and reflected light goes out input path by the angle segregation with certain, has improved the return loss in loop.
Accompanying drawing explanation
Fig. 1 is cut-open view of the present utility model.
In figure, Reference numeral is expressed as: 1, connector body; 2, insertion tube; 3, input optical fibre; 4, the joints of optical fibre; 5, lens; 6, beam splitting element; 7, glass substrate; 8, liquid crystal layer; 9, transparency electrode; 10, output optical fibre.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated, embodiment of the present utility model is not limited to this.
Embodiment 1:
As shown in Figure 1, the utility model comprises the optical attenuator that return loss is high, it is characterized in that: comprise connector body 1, insertion tube 2, input optical fibre 3, the joints of optical fibre 4, lens 5, output optical fibre 10 and damping mechanism, described insertion tube 2 levels are crossed connector body 1, input optical fibre 3 and output optical fibre 10 insert in insertion tube 2 from the both ends horizontal of insertion tube 2 respectively, between input optical fibre 3 and output optical fibre 10, damping mechanism is set, between input optical fibre 3 and damping mechanism, be connected successively the joints of optical fibre 4 and lens 5, between damping mechanism and output optical fibre 10, connect successively lens 5 and the joints of optical fibre 4, described damping mechanism comprises liquid crystal layer 8, is positioned at the transparency electrode 9 on liquid crystal layer 8 both sides, glass substrate 7 and beam splitting element 6, at the adjacent glass substrate 7 in the outside of every transparency electrode 9, at the adjacent beam splitting element 2 in the outside of every glass substrate 7.
The light signal of input optical fibre incident becomes parallel incident light after GRIN Lens, and this directional light is divided into the orthogonal two bundle polarized lights of plane of polarization by beam splitting element.O light and e light, when not adding the liquid crystal layer of any voltage, two bundle polarized lights rotate 90 simultaneously., postrotational polarized light by another, become again 90 with Pl optical axis ' beam splitting element be combined into a branch of directional light, by second GRIN Lens essence, closed into output optical fibre.
When two transparency electrodes of liquid crystal layer add after certain voltage, liquid crystal layer crystal orientation turn round the deflection that just produces certain angle to arranging, make to pass through liquid crystal layer., there is the rotation of plane of polarization in o light and e light.Wherein, the part of polarization direction 90-degree rotation.O light and e light, merged into a branch of parallel light emergence by beam splitting element, and remaining polarized light of face can not be converged, and penetrate light path with certain angle.The antireflection setting that liquid crystal layer, beam splitting element are appropriate and the assembly structure of damping mechanism uniqueness, improved the return loss of whole device, widened temperature usable range and spectral range.
Embodiment 2:
Preferably concrete structure is as follows on the basis of embodiment 1 for the present embodiment: lens 5 are inclined-plane lens.Reflected light goes out input path by the angle segregation with certain, has improved the return loss in loop.
Described beam splitting element 6 is polarising beam splitter.Be convenient to input optical fibre incident light to be divided into the orthogonal two bundle polarized lights of plane of polarization.
Described input optical fibre 3 and output optical fibre 10 are parallel to each other.
Described damping mechanism upper and lower surface all arranges compact heap.
Just can realize this utility model as mentioned above.
Claims (5)
1. the high optical attenuator of return loss, it is characterized in that: comprise connector body (1), insertion tube (2), input optical fibre (3), the joints of optical fibre (4), lens (5), output optical fibre (10) and damping mechanism, described insertion tube (2) level is crossed connector body (1), input optical fibre (3) and output optical fibre (10) insert in insertion tube (2) from the both ends horizontal of insertion tube (2) respectively, between input optical fibre (3) and output optical fibre (10), damping mechanism is set, between input optical fibre (3) and damping mechanism, be connected successively the joints of optical fibre (4) and lens (5), between damping mechanism and output optical fibre (10), connect successively lens (5) and the joints of optical fibre (4), described damping mechanism comprises liquid crystal layer (8), is positioned at the transparency electrode (9) on liquid crystal layer (8) both sides, glass substrate (7) and beam splitting element (6), at the adjacent glass substrate in the outside of every transparency electrode (9) (7), at the adjacent beam splitting element in the outside of every glass substrate (7) (2).
2. the high optical attenuator of return loss according to claim 1, is characterized in that: described lens (5) are inclined-plane lens.
3. the high optical attenuator of return loss according to claim 1, is characterized in that: described beam splitting element (6) is polarising beam splitter.
4. the high optical attenuator of return loss according to claim 1, is characterized in that: described input optical fibre (3) and output optical fibre (10) are parallel to each other.
5. the high optical attenuator of return loss according to claim 1, is characterized in that: described damping mechanism upper and lower surface all arranges compact heap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374499.8U CN203930117U (en) | 2014-07-09 | 2014-07-09 | The optical attenuator that return loss is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374499.8U CN203930117U (en) | 2014-07-09 | 2014-07-09 | The optical attenuator that return loss is high |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203930117U true CN203930117U (en) | 2014-11-05 |
Family
ID=51825914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420374499.8U Expired - Fee Related CN203930117U (en) | 2014-07-09 | 2014-07-09 | The optical attenuator that return loss is high |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203930117U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062711A (en) * | 2014-07-09 | 2014-09-24 | 成都美美通信技术有限公司 | Optical attenuator with wide temperature utilization range and wide spectral range |
-
2014
- 2014-07-09 CN CN201420374499.8U patent/CN203930117U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062711A (en) * | 2014-07-09 | 2014-09-24 | 成都美美通信技术有限公司 | Optical attenuator with wide temperature utilization range and wide spectral range |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150709 |
|
| EXPY | Termination of patent right or utility model |