CN202305880U - Pluggable packaging variable optical attenuator - Google Patents
Pluggable packaging variable optical attenuator Download PDFInfo
- Publication number
- CN202305880U CN202305880U CN201120377192XU CN201120377192U CN202305880U CN 202305880 U CN202305880 U CN 202305880U CN 201120377192X U CN201120377192X U CN 201120377192XU CN 201120377192 U CN201120377192 U CN 201120377192U CN 202305880 U CN202305880 U CN 202305880U
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- Prior art keywords
- attenuator
- variable optical
- optical attenuator
- fiber
- optical
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Abstract
The utility model discloses a pluggable packaging variable optical attenuator, comprising the variable optical attenuator and a tap detector. The output end of the variable optical attenuator is equipped with a pin, the outgoing-fiber of the pin is connected with the tap detector, and the outgoing-fiber and the outgoing-fiber of the tap detector both employ microbend fibers. Compared with the fiber welding mode of the prior art, the pluggable packaging variable optical attenuator of the utility model employs the pin to be coupled with an optical attenuator chip directly, does not have welding point and thermal shrinkable sleeve, and enables the optical dimension to be reduced substantially.
Description
Technical field
The utility model belongs to the communications field, is specifically related to the optics and the mechanical hook-up of the variable optical attenuator of a kind of Small Form-Factor Pluggable (SFP).
Background technology
Variable optical attenuator (voa) is one of optical device important in the optical communication.Erbium-Doped Fiber Amplifier (EDFA) (EDFA) combines with dense wave division multipurpose (DWDM) technology becomes the main means that current two-forty is communicated by letter with high-capacity optical fiber.But; Because the gain spectral of EDFA is uneven, make some different wave length signals in the dwdm system after EDFA amplifies transmission, corresponding gain is inconsistent; And along with a plurality of EDFA cascades in the long haul communications systems; Make this gain unevenness constantly accumulate, cause the power division of channel (wavelength) uneven, cause the dynamic unbalance of system; In addition, when number of channel increase and decrease or the change of certain channel power, also can cause other channel power saltus step, optical power value that each channel of receiver is received and OSNR (OSNR) just have nothing in common with each other.This non-equilibrium is very harmful to the transmission performance of total system, tends to make between each road signal crosstalk, and makes the bit error rate (BER) of some wavelength channel be higher than designated value.If the lack of balance performance number is too high, then makes light signal that nonlinear effect takes place in Optical Fiber Transmission, and make the received optical power value surpass the maximum dynamic range of receiver; If the lack of balance performance number is low excessively, then make the received optical power value be lower than the sensitivity of receiver, can't accept light signal.So, there is not the error code transmission for the long distance High-speed that realizes dwdm system, must make each channel signal optical power value consistent, promptly need monitor and equilibrium multichannel light power.
In order to monitor and measure the luminous power of the light signal of in optical fiber, propagating; Optical tap (Tap) commonly used is told the sub-fraction (1%～10%) of signal and with this part and photodetector coupling, the electric current of this photodetector generation is represented the total optical power of the contained light signal of optical fiber through optical fiber.When the total optical power of finding light signal was not in the desired scope of system, the total optical power that the adjustment flashlight is set through regulating variable optical attenuator was in the desired scope of system.
Because the luminous power of the signal in the adjusting optical communication network is usually directed to before the measuring and adjusting point and afterwards luminous power, with being favourable in these two kinds of function combinations to devices.With the most directly method of optical tap and VOA combination is with the output optical fibre of VOA and the input optical fibre welding of optical tap.
Based on the shortcoming with the method for VOA and optical tap welding is that the device that is obtained is not very compact.In fact,, need several centimetres fiber lengths at least, take very big space, can not put into standard Small Form-Factor Pluggable (SFP) encapsulation at two welding ends in order to carry out fused fiber splice.
Summary of the invention
The utility model has overcome the problem that exists in the prior art; The purpose of the utility model provides a kind of high reliability that has; The VOA-tap mixing arrangement of low back-reflection and compact size; Preferential, this device size enough compactness makes standard Small Form-Factor Pluggable (SFP) encapsulation can be used as the shell of this device.
The technical scheme that the utility model adopted is specific as follows:
A kind of variable optical attenuator that plugs encapsulation; Comprise variable optical attenuator, tap detector; The variable optical attenuator output terminal is provided with contact pin, and the fiber of this contact pin is connected with the tap detector, and the fiber of this fiber and tap detector all adopts microbend fiber.
Variable optical attenuator adopts slab guide attenuator or MEMS attenuator.
Said MEMS attenuator includes twin-core contact pin, Grin lens, transistor outline sealing cap, glass optical window, chip of micro-electro-mechanical system, transistor outline stand and sets gradually.
The related a kind of variable optical attenuator that plugs encapsulation of the utility model has the following advantages:
The utility model adopts contact pin to connect the beam split joint style, and adopts microbend fiber, the direct and optical attenuator chip coupling with contact pin; There is not pad; Do not have heat-shrinkable T bush, compare, reduced optical dimensions greatly with the optical fiber welding manner of prior art.
Description of drawings
Fig. 1, first kind of variable optical attenuator structural representation that can plug encapsulation of the utility model;
Fig. 2, second kind of variable optical attenuator structural representation that can plug encapsulation of the utility model;
Fig. 3, micro-electromechanical system (MEMS) attenuator structural representation;
Wherein:
1, first joints of optical fibre; 2, first single core contact pin;
3, slab guide attenuator; 4, second single core contact pin;
5, first optical fiber; 6, second optical fiber;
7, tap detector; 9, second joints of optical fibre;
8, MEMS attenuator;
801, twin-core contact pin; The 802:Grin lens;
803, transistor outline sealing cap; 804, glass optical window;
805, MEMS chip; 806, transistor outline stand;
Embodiment
Though in conjunction with various embodiment with described for example that the utility model instructs, and do not mean that these embodiment of being limited to that the utility model instructs.On the contrary, the utility model is instructed comprises that it should be appreciated by one skilled in the art that various substitute, change and are equal to embodiment.
The variable optical attenuator structure that plugs encapsulation shown in Figure 1 comprises the single core contact pin of the single core contact pin of first joints of optical fibre 1, first 2, second 4, slab guide attenuator 3; First optical fiber 5, second optical fiber 6, tap detector 7, second joints of optical fibre 9 have pin on the said tap photo-detector 7.Said second single core contact pin 4 is coupled with the pad value output end face of slab guide attenuator 3.First joints of optical fibre 1 are coupled through the output terminal of first single core contact pin 2 butt joint couplings, access slab guide attenuator 3, the second single core contact pin 4 isoplanar waveguide attenuators 3, the output optical fibre of second single core contact pin 4, and promptly first optical fiber 5 connects tap detector 7.Tap detector 7 other ends, promptly 6 of second optical fiber are connecting second joints of optical fibre 9.
In conjunction with Fig. 1 to based on waveguide attenuator the variable optical attenuator of plugged encapsulation realize that function course specifically describes as follows: first joints of optical fibre 1 are as importing optical port; Light signal is through first joints of optical fibre 1; Enter into first single core contact pin 2; This moment first, single core contact pin 2 was coupled with first end face of slab guide attenuator 3, entered into slab guide attenuator 3, then the output end face of slab guide attenuator 3 and second single core contact pin 4 couplings; Light signal and then via the fiber of second single core contact pin 4, i.e. first optical fiber, 5 outputs.5 input ends of first optical fiber as tap detector 7; Tap detector 7 is told the photo detector chip of a part of light in the tap detector 7, and the ratio that this part light can adopt is 1%～10%, and this part light changes into current signal by photo detector chip; Pin output by photo detector chip; Remaining light reflects, and through 6 outputs of second optical fiber, is connected with outside as the output optical port by second connector 9 at last.
The structure of the utility model also can be based on a kind of variable optical attenuator that plugs encapsulation of MEMS (MEMS) attenuator; Its structure is referring to shown in Figure 2; Comprise: first joints of optical fibre 1, MEMS attenuator 8, tap detector 7, second joints of optical fibre 9.Wherein the structure of MEMS attenuator 8 is referring to Fig. 3; The MEMS attenuator comprises that twin-core contact pin 801, Grin lens 802, transistor outline (TO) sealing cap 803, glass optical window 804, MEMS chip 805, transistor outline (TO) stand 806 set gradually, twin-core contact pin 801 and the coupling of Grin lens 802 end faces.One road output optical fibre of the twin-core contact pin 801 in the MEMS attenuator 8 is connected with the incident end in the joint detector 7.Its light path process specifically describes as follows: first connector 1 is as the input optical port; Light signal is through first connector 1; Enter into MEMS attenuator 8; Light signal is successively behind the glass optical window 804 of the twin-core contact pin 801 through the MEMS attenuator, Grin lens 802, TO sealing cap 803, incides on the MEMS chip 805 to reflect, and gets into Grin lens 802.Through changing the angle of MEMS chip, only some is coupled into twin-core contact pin 801 to make the light of Grin lens 802 outgoing, thereby reaches predetermined pad value.Light signal after decay and then get into tap detectors 7 via the output of first optical fiber 5.First optical fiber 5 is as the input end of tap detector 7; Tap detector 7 is told the photo detector chip of a part of light in the tap detector 7, and the ratio of this part light is 1%～10%, and this part light changes into current signal by photo detector chip; Export by pin; Remaining light reflects, and via 6 outputs of second optical fiber, is connected with outside as the output optical port by second joints of optical fibre 9 at last.
Claims (3)
1. variable optical attenuator that can plug encapsulation; Comprise variable optical attenuator, tap detector; It is characterized in that: the variable optical attenuator output terminal is provided with contact pin; The fiber of this contact pin is connected with the tap detector, and the fiber of this fiber and tap detector all adopts microbend fiber.
2. the variable optical attenuator that plugs encapsulation according to claim 1 is characterized in that: variable optical attenuator adopts slab guide attenuator or MEMS attenuator.
3. the variable optical attenuator that plugs encapsulation according to claim 1 is characterized in that: said MEMS attenuator includes twin-core contact pin (801), Grin lens (802), transistor outline sealing cap (803), glass optical window (804), chip of micro-electro-mechanical system (805), transistor outline stand (806) and sets gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120377192XU CN202305880U (en) | 2011-09-30 | 2011-09-30 | Pluggable packaging variable optical attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120377192XU CN202305880U (en) | 2011-09-30 | 2011-09-30 | Pluggable packaging variable optical attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305880U true CN202305880U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120377192XU Expired - Lifetime CN202305880U (en) | 2011-09-30 | 2011-09-30 | Pluggable packaging variable optical attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305880U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842790A (en) * | 2015-01-12 | 2016-08-10 | 韩朝阳 | Miniature hot-plug optical attenuator |
-
2011
- 2011-09-30 CN CN201120377192XU patent/CN202305880U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842790A (en) * | 2015-01-12 | 2016-08-10 | 韩朝阳 | Miniature hot-plug optical attenuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
|
| CX01 | Expiry of patent term |