CN201508446U - Adjustable dispersion compensation device of integrated optical fiber - Google Patents
Adjustable dispersion compensation device of integrated optical fiber Download PDFInfo
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- CN201508446U CN201508446U CN 200920204483 CN200920204483U CN201508446U CN 201508446 U CN201508446 U CN 201508446U CN 200920204483 CN200920204483 CN 200920204483 CN 200920204483 U CN200920204483 U CN 200920204483U CN 201508446 U CN201508446 U CN 201508446U
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- fiber
- dispersion compensation
- optical fibre
- compensation device
- loopback
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Abstract
The utility model provides an adjustable dispersion compensation device of an integrated optical fiber, and the optical fiber inserting cores of the adjustable dispersion compensation device of the integrated optical fiber are a plurality of optical integrated inserting cores, the chromatic dispersion at a plurality of wave channels with phase space wavelength can be simultaneously compensated, meanwhile, through changing and interfering the temperature of the cavity, the amount of dispersion compensation needed by various optical signals can be controlled and changed, and the space is saved, meanwhile, the cost is reduced.
Description
Technical field
The utility model relates to a kind of color dispersion compensation device, the integrated color dispersion compensation device of particularly a kind of multifiber.
Background technology
Wavelength-division multiplex (WDM) is a kind of technology of passing through optical signal transmission fiber that is widely used in optical communication system.On the substrate, in the WDM transmission system, when having interference, on an optical fiber, do not transmit the light signal of a plurality of wavelength.
A problem relevant with the use of WDM is so-called chromatic dispersion.It is because each wavelength component of signal is passed optical fiber with slightly different speed substantially that this problem occurs, and causes broadening when point of arrival pulse, and desired is that the influence of chromatic dispersion is remained on floor level as far as possible.
Prior art has proposed some kinds of schemes to avoid or to reduce effect of dispersion.
Wherein a kind of way is to use the dispersion compensation unit array, comprises the adjustable dispersion compensating unit of a plurality of different dispersion measure grades, is used to compensate different residual dispersions, and uses a photoswitch to control at each dispersion compensation unit.
Yet this dispersion compensation device need use two or more corresponding dispersion compensation unit and a plurality of control circuit for the chromatic dispersion on two or more radio frequency channels that the uniform distances wavelength arranged, so not only increase the complexity of control, and taken very big space.
Summary of the invention
A purpose of the present utility model provides a kind of integrated optical fiber Tunable Dispersion Compensator, and it can compensate the chromatic dispersion on a plurality of radio frequency channels that the spaced apart wavelength arranged simultaneously.
Another purpose of the present utility model provides a kind of integrated optical fiber Tunable Dispersion Compensator, and this compensator is tunable in certain wavelength coverage at least.
Another purpose of the present utility model be to propose a kind of can be under the different situations, control and change the needed chromatic dispersion compensation quantity of light signal by the temperature that changes interference cavity.
To achieve these goals, the utility model provides a kind of integrated optical fiber color dispersion compensation device, be used for the chromatic dispersion of compensated optical signal one predetermined band, described device comprises a collimating apparatus and an interference cavity, described collimating apparatus comprises a fiber stub and lens, this fiber stub and this lens are oppositely arranged, and being centered close on the same axis line of each element, described fiber stub comprises an input optical fibre, one output optical fibre, and at least one loopback fiber, light beam is imported by input optical fibre, enters interference cavity via lens and interferes the back to enter interference cavity by loopback fiber, through being exported by output optical fibre after at least twice interference.
Wherein, preferred version is: described fiber stub by input optical fibre, output optical fibre and a loopback fiber be quadrilateral with respect to described axis symmetry arrangement in fiber stub.
Wherein, preferred version is: described fiber stub by input optical fibre, output optical fibre and a loopback fiber with respect to described axis in twos symmetry linearly be arranged in the fiber stub successively.
Wherein, preferred version is: described fiber stub is hexagonal symmetry by input optical fibre, output optical fibre and two loopback fibers with respect to described axis and is arranged in the fiber stub.
Wherein, preferred version is: described lens are coated with anti-reflection film near the end face of described fiber stub.
Wherein, preferred version is: described interference cavity is provided with a heating unit, and this heating unit is used for to the interference cavity heating, to change the refractive index of silicon material interference cavity.
Owing to adopted above-mentioned color dispersion compensation device, not only can compensate the chromatic dispersion on a plurality of radio frequency channels that the spaced apart wavelength arranged simultaneously, but also can control and change the needed chromatic dispersion compensation quantity of various light signals by the temperature that changes interference cavity, and saved the space, also reduced cost.
Description of drawings
Engaging accompanying drawing below further specifies embodiments of the invention:
Fig. 1 is the three-dimensional structure diagram of integrated optical fiber color dispersion compensation device.
Fig. 2 is the sectional view of integrated optical fiber color dispersion compensation device.
Fig. 3 is the structural representation of fiber stub embodiment one in the integrated optical fiber color dispersion compensation device.
Fig. 4 is the structural representation of fiber stub embodiment two in the integrated optical fiber color dispersion compensation device.
Fig. 5 is the structural representation of fiber stub embodiment three in the integrated optical fiber color dispersion compensation device.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, three-dimensional structure diagram and sectional view for color dispersion compensation device, this color dispersion compensation device 50 comprises a collimating apparatus 10 and an interference cavity 30, this collimating apparatus 10 comprises a fiber stub 11 and lens 13, this fiber stub 11 is oppositely arranged with these lens 13, this fiber stub 11 and these lens 13 are fixing by one the 3rd glass bushing 17 and one second glass bushing 15 respectively, and two sleeve pipes connect relatively, and being centered close on the same axis line of each element; Be relatively set with lens 13 with the transmitting terminal 1125 of this fiber stub 11, these lens 13 have a receiving end end face 133 and a lens end 135, be coated with anti-reflection film 1331 on this receiving end end face 133, be used to increase transmitted light and reduce reflected light, to prevent this partial reflection light reflected back optical fiber, stray light signal; The lens end 135 of the other end for protruding; This collimating apparatus 10 is connected with a silicon material interference cavity 30, be provided with a heating unit 350 on interference cavity 30, this heating unit 350 is used for to these silicon material interference cavity 30 heating, to change the refractive index of this silicon material interference cavity 30, thereby change the time delay of light signal, to reach the purpose of dispersion compensation.
As shown in Figure 3, structural representation for fiber stub embodiment one in the color dispersion compensation device, the fiber stub 11 of this color dispersion compensation device 50 comprises an input optical fibre 111a, one output optical fibre 111b, and a loopback fiber 111c, this loopback fiber 111c is made up of an input end 111d, an output terminal 111e, a link 111f; The output terminal 111e of this input optical fibre 111a and this loopback fiber 111c is symmetrical arranged with respect to axis A, and input end 111d and the output optical fibre 111b of this loopback fiber 111c are symmetrical arranged with respect to axis A; The input end 111d of described input optical fibre 111a, output optical fibre 111b and loopback fiber 111c and the end of output terminal 111e are in the glass column 112 that square is arranged in fiber stub 11.
Light signal is from input optical fibre 111a incident, be radiated on the interference cavity 30 through behind the lens 13, through entering lens 13 after the reflection of interference cavity 30 once more and accurately from the output terminal 111e outgoing of loopback fiber 111c, finish dispersion compensation for the first time, go into to inject lens 13 once more by input end 111d behind the link 111f of light signal through loopback fiber 111c afterwards, be radiated on the interference cavity 30 through behind the lens 13, through entering lens 13 after the reflection of interference cavity 30 and, finishing dispersion compensation for the second time finally accurately from output optical fibre 111b outgoing.
As shown in Figure 4, structural representation for fiber stub embodiment two in the color dispersion compensation device, the fiber stub 11 of this color dispersion compensation device 50 comprises an input optical fibre 111a ', one output optical fibre 111b ', and a loopback fiber 111c ', this loopback fiber 111c ' is made up of an input end 111d, an output terminal 111e ', a link 111f '; The output terminal 111e ' of this input optical fibre 111a ' and this loopback fiber 111c ' is symmetrical arranged with respect to axis A, and input end 111d ' and the output optical fibre 111b ' of this loopback fiber 111c ' are symmetrical arranged with respect to axis A; The input end 111d ' of described input optical fibre 111a ', output optical fibre 111b ' and loopback fiber 111c ' and the end of output terminal 111e ' linearly are arranged in the glass column 112 of fiber stub 11 successively.
Light signal is from input optical fibre 111a ' incident, be radiated on the interference cavity 30 through behind the lens 13, through entering lens 13 after the reflection of interference cavity 30 once more and accurately from the output terminal 111e ' outgoing of loopback fiber 111c ', finish dispersion compensation for the first time, light signal goes into to inject lens 13 through the link 111f ' back of loopback fiber 111c ' once more by input end 111d ' afterwards, be radiated on the interference cavity 30 through behind the lens 13, through entering lens 13 after the reflection of interference cavity 30 and, finishing dispersion compensation for the second time finally accurately from output optical fibre 111b ' outgoing.
As shown in Figure 5, structural representation for fiber stub embodiment 3 in the color dispersion compensation device, the fiber stub 11 of this color dispersion compensation device 50 comprises an input optical fibre 111a "; an output optical fibre 111f ", and one first loopback fiber 111j " and one second loopback fiber 111k ", this first loopback fiber 111j " by a first input end 111c ", one first output terminal 111b "; one first link 111g " form this second loopback fiber 111k " by one second input end 111e ", one second output terminal 111d "; one second link 111h " form; This input optical fibre 111a " and this first loopback fiber 111j " the first output terminal 111b " be symmetrical arranged with respect to axis A; this first loopback fiber 111j " first input end 111c " and this second loopback fiber 111k " the second output terminal 111d " be symmetrical arranged this second loopback fiber 111k with respect to axis A " and the second input end 111e " and output optical fibre 111f " be symmetrical arranged with respect to axis A; Described input optical fibre 111a ", output optical fibre 111f ", the first loopback fiber 111j " first input end 111c ", the first output terminal 111b " and the second loopback fiber 111k " the second input end 111e ", the second output terminal 111d " the end be in the glass column 112 that regular hexagon is arranged in fiber stub 11.
Light signal is from the first input optical fibre 111a " incident; through being radiated on the interference cavity 30 behind the lens 13; through enter lens 13 after the reflection of interference cavity 30 once more and accurately from the first loopback fiber 111j " the first output terminal 111b " outgoing; finish dispersion compensation for the first time; light signal is through the first link 111g afterwards " transmission enter the first loopback fiber 111j " first input end 111c ", and by first input end 111c " go into to inject lens 13; be radiated on the interference cavity 30 through behind the lens 13; through enter lens 13 after the reflection of interference cavity 30 and from the second loopback fiber 111k " the second output terminal 111d " outgoing; finish dispersion compensation for the second time; light signal is through the second link 111h afterwards " transmission enter the second loopback fiber 111k " the second input end 111e ", and by the second input end 111e " go into to inject lens 13; be radiated on the interference cavity 30 through behind the lens 13; through enter lens 13 after the reflection of interference cavity 30 and from output optical fibre 111f " outgoing, finish dispersion compensation for the third time.
The distance and position difference of every couple of relative axis A of input-output optical fiber, the size of dispersion compensation is also inequality, can select corresponding color dispersion compensation device according to the dispersion measure of required compensation.
This color dispersion compensation device not only can compensate the chromatic dispersion on a plurality of radio frequency channels that the spaced apart wavelength arranged simultaneously, but also can control and change the needed chromatic dispersion compensation quantity of various light signals by the temperature that changes interference cavity, and saved the space, also reduced cost.
Although specifically 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 this utility model that does not break away from appended claims and limited; can make various variations to this utility model in the form and details, be the protection domain of this utility model.
Claims (7)
1. integrated optical fiber color dispersion compensation device, be used for the chromatic dispersion of compensated optical signal one predetermined band, described device comprises a collimating apparatus and an interference cavity, described collimating apparatus comprises a fiber stub and lens, this fiber stub and this lens are oppositely arranged, and being centered close on the same axis line of each element, it is characterized in that: described fiber stub comprises an input optical fibre, one output optical fibre, and at least one loopback fiber, light beam is imported by input optical fibre, enter interference cavity via lens and interfere the back to enter interference cavity, through exporting by output optical fibre after at least twice interference by loopback fiber.
2. integrated optical fiber color dispersion compensation device as claimed in claim 1 is characterized in that: described fiber stub by input optical fibre, output optical fibre and loopback fiber be quadrilateral with respect to described axis symmetry arrangement in fiber stub.
3. integrated optical fiber color dispersion compensation device as claimed in claim 1 is characterized in that: described fiber stub by input optical fibre, output optical fibre and a loopback fiber with respect to described axis in twos symmetry linearly be arranged in the glass tube successively.
4. integrated optical fiber color dispersion compensation device as claimed in claim 1 is characterized in that: described fiber stub is hexagonal symmetry by input optical fibre, output optical fibre and two loopback fibers with respect to described axis and is arranged in the glass tube.
5. integrated optical fiber color dispersion compensation device as claimed in claim 1 is characterized in that: described lens are coated with anti-reflection film near the end face of described fiber stub.
6. integrated optical fiber color dispersion compensation device as claimed in claim 1 is characterized in that: described interference cavity is provided with a heating unit, and this heating unit is used for to the interference cavity heating, to change the refractive index of interference cavity.
7. integrated optical fiber color dispersion compensation device as claimed in claim 6 is characterized in that: this interference cavity is the silicon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920204483 CN201508446U (en) | 2009-09-04 | 2009-09-04 | Adjustable dispersion compensation device of integrated optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920204483 CN201508446U (en) | 2009-09-04 | 2009-09-04 | Adjustable dispersion compensation device of integrated optical fiber |
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| CN201508446U true CN201508446U (en) | 2010-06-16 |
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| CN 200920204483 Expired - Fee Related CN201508446U (en) | 2009-09-04 | 2009-09-04 | Adjustable dispersion compensation device of integrated optical fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324984A (en) * | 2011-07-15 | 2012-01-18 | 哈尔滨诺方光电科技有限公司 | Dispersion compensator and dispersion compensation system thereof |
| CN103246018A (en) * | 2012-02-10 | 2013-08-14 | 昂纳信息技术（深圳）有限公司 | Packaging method and structure of adjustable chromatic dispersion compensation device |
| CN104950397A (en) * | 2015-06-29 | 2015-09-30 | 武汉光迅科技股份有限公司 | Optical filter adopting bandwidth compression |
-
2009
- 2009-09-04 CN CN 200920204483 patent/CN201508446U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324984A (en) * | 2011-07-15 | 2012-01-18 | 哈尔滨诺方光电科技有限公司 | Dispersion compensator and dispersion compensation system thereof |
| CN103246018A (en) * | 2012-02-10 | 2013-08-14 | 昂纳信息技术（深圳）有限公司 | Packaging method and structure of adjustable chromatic dispersion compensation device |
| CN103246018B (en) * | 2012-02-10 | 2016-09-07 | 昂纳信息技术（深圳）有限公司 | The method for packing of a kind of color dispersion compensation device and structure |
| CN104950397A (en) * | 2015-06-29 | 2015-09-30 | 武汉光迅科技股份有限公司 | Optical filter adopting bandwidth compression |
| CN104950397B (en) * | 2015-06-29 | 2018-08-07 | 武汉光迅科技股份有限公司 | A kind of optical filter of bandwidth reduction |
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