CN2465196Y - Optical path corrected wave division multiplexer/demultiplexer unit - Google Patents
Optical path corrected wave division multiplexer/demultiplexer unit Download PDFInfo
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- CN2465196Y CN2465196Y CN 01212490 CN01212490U CN2465196Y CN 2465196 Y CN2465196 Y CN 2465196Y CN 01212490 CN01212490 CN 01212490 CN 01212490 U CN01212490 U CN 01212490U CN 2465196 Y CN2465196 Y CN 2465196Y
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Abstract
The utility model relates to an optical path corrected wave division multiplexer/demultiplexer component, which is composed of an input-output double-hole optical fiber thrusting needle, a first self-focusing lens, narrow band light filtering pieces, an optical wedge pair, a second self-focusing lens and a download optical fiber thrusting needle which are arranged in turn on an optical path, wherein, an isolator can also be arranged between the optical wedge pair and the second self-focusing lens. The parallel cascade of the components of N narrow band light filter pieces with different lambda 1, lambda 2 to lambda NN central wavelength forms the N wavelength wave division multiplexer/demultiplexer. The component has convenient debugging; simply moving in parallel or rotating one optical wedge in the optical wedge pair can correct a light shaft of output signal light and guarantee to obtain optimum coupling efficiency.
Description
The utility model belongs to the basic components and parts of optical communication field, is particularly suitable for the DWDM fiber optic communication network and uses.
The DWDM fiber optic communication network needs a large amount of Wavelength division multiplexer/demultiplexers, at present, is broadly divided into narrow band pass filter type and light coral type two big classes.The visible United States Patent (USP) 4244045,1/1981 of narrow band pass filter type; 5579420,11/1996; 5612824,3/1997; 5799121,8/1998; With 6084994,7/2000.Optical element and structure in the described system of these patents are basic identical, are made up of the input and output diplopore optical fiber contact pins, first GRIN Lens that are arranged in order on light path, the narrow band pass filter of being close to the first GRIN Lens output plane, second GRIN Lens and download optical fiber contact pins.Because the insertion and the intrinsic certain error of optical element of narrow band pass filter can cause that the beam Propagation direction changes a lot in the system, cause coupling efficiency to reduce or the device yield reduction.System is being carried out in the debug process for this reason, generally can with second GRIN Lens and download the corresponding translation of optical axis of optical fiber contact pins or deflection to obtain optimistic coupling efficiency.But the diplopore position and the GRIN Lens of the thickness of narrow band pass filter, the depth of parallelism, diplopore optical fiber contact pins all can have certain error, the variation of download signal beam optical axis transmission direction is at random, reach optimistic coupling efficiency, system architecture and adjustment are had certain degree of difficulty.
The utility model proposes the repairable Wavelength division multiplexer/demultiplexer assembly of a kind of light path, it is right to insert wedge in existing Wavelength division multiplexer/demultiplexer system, its purpose is by simple translation or rotating wedge centering a slice wedge, the optical axis of the signal beams transmission direction of downloading is corrected, to guarantee to obtain optimistic coupling efficiency.
The repairable Wavelength division multiplexer/demultiplexer assembly of the utility model light path, by the input and output diplopore optical fiber contact pins that on light path, is arranged in order, first GRIN Lens, the narrow band pass filter of being close to the first GRIN Lens output plane, second GRIN Lens and download optical fiber contact pins are formed, wherein first GRIN Lens and second GRIN Lens are identical, download to download in fiber position and the input-output optical fiber contact pin in the optical fiber contact pins and import, the output optical fibre position becomes complete symmetric offset spread with respect to optical axis, it is right to it is characterized in that placing a wedge between the described narrow band pass filter and second GRIN Lens, wedge is vertical with light path to binding face, can be along binding face translation or rotation between the wedge.
The repairable Wavelength division multiplexer/demultiplexer assembly of described light path, it is further characterized in that the right wedge shape of described wedge is identical with physical dimension, the angle of wedge is 1 degree-20 degree.
The repairable Wavelength division multiplexer/demultiplexer assembly of above-mentioned light path, the above wedge of light path to and second GRIN Lens between also can place isolator.
The repairable Wavelength division multiplexer/demultiplexer assembly of aforesaid various light path constitutes N wave-length division multiplexing demultiplexing device side by side by N described assembly, and N described assembly has λ respectively
1, λ
2,---λ
NThe narrow band pass filter of N different centre wavelengths, two optical fiber of the input and output diplopore optical fiber contact pins of each assembly and two optical fiber of adjacent component diplopore optical fiber contact pins are the welding of bunchiness form class connection successively, and first optical fiber that only stays the two optical fiber contact pins of first assembly input and output is as light signal λ
1, λ
2,---λ
NThe two optical fiber contact pins of input/output port, a N assembly input and output second optical fiber as with the standby port of next assembly cascade welding, the download optical fiber that each assembly is downloaded optical fiber contact pins is respectively as the download port of specific wavelength flashlight.
Great advantage of the present utility model is that the assembly debugging is convenient, as long as simple translation or rotating wedge centering a slice wedge can be corrected the optical axis of output signal beam transmission direction, guarantees to obtain optimistic coupling efficiency.
Fig. 1 represents to obtain the idealized system of optimistic coupling efficiency.
Fig. 2 represents because narrow band pass filter has the translation that certain thickness causes the beam Propagation direction.
Fig. 3 represents a kind of scheme of the present utility model.
Fig. 4 represents that the utility model has a kind of scheme of isolator.
Fig. 5 represents adjustment method of the present utility model.
Fig. 6 represents to debug and assemble the utility model assembly that finishes.
Fig. 7 represents N the repairable Wavelength division multiplexer/demultiplexer of wavelength light path.
In order to analyze λ i wavelength download optimistic coupling efficiency in the Wavelength division multiplexer/demultiplexer assembly, its ideal system as shown in Figure 1, it is by two identical input and output diplopore optical fiber contact pins 1 and download optical fiber contact pins 4, two identical first GRIN Lens 2, second GRIN Lens 3 and narrow band pass filters 5 are formed.Only use wherein optical fiber of diplopore optical fiber contact pins as the download optical fiber contact pins that wavelength signals light is downloaded, input/output signal fiber position during this optical fiber and first optical fiber are inserted becomes complete symmetric offset spread with respect to optical axis.The optical axis of the relative contact pin of diplopore in the diplopore optical fiber contact pins is symmetrically distributed, and spacing is d, if the diameter of two GRIN Lens is d in the system
0, 0＜d＜d then
0By λ
1, λ
2λ
nThe input signal light of forming is from importing with an optical fiber A the diplopore optical fiber contact pins 1 at small oblique angle, because optical fiber A is that d/2 places from optical axis distance, incident beam is through first GRIN Lens 2, the optical axis of its light beam should be by the optical axis center position of first GRIN Lens, 2 output surfaces, the normal of the optical axis of its signal beams and narrow band pass filter 5 film surfaces, become certain incident angle φ,, download λ if the thickness of narrow band pass filter 5 is 0
iThe center that the signal beams optical axis just can be incident on second GRIN Lens, 3 input surfaces is on the optical axis.After second GRIN Lens 3, download incident optical symmetry in fiber position strictness and the input and output diplopore optical fiber contact pins 1 in the optical fiber contact pins 4 if download, download λ
iSignal beams could strict focus on the download optical fiber C port of downloading optical fiber contact pins 4, and is coupled in the output optical fibre with optimistic coupling efficiency and goes.
If the parallelism error of narrow band filter slice is 0, certain thickness is only arranged, download λ
iThe signal beams optical axis can depart from systematic optical axis, and with desirable transmission path translation only takes place, and sees Fig. 2.At this moment can be with the optical axis of second GRIN Lens 3 and output optical fibre contact pin 4 assemblies, corresponding translation obtains best coupling efficiency.But the depth of parallelism of narrow band pass filter in general, the diplopore position and the GRIN Lens of diplopore optical fiber contact pins all can have certain error, cause downloading λ
iThe variation of signal beams optical axis transmission direction is at random.In order to obtain optimistic coupling efficiency, can cause the difficult adaptation of system architecture.The wedge that the utility model is introduced is right, can be to because the narrow band pass filter thickness and the depth of parallelism, the diplopore position of diplopore optical fiber contact pins and the error of GRIN Lens, the download λ i signal beams optical axis transmission direction error of being introduced is comprehensively corrected, obtain optimistic coupling efficiency, see Fig. 3.By λ
1λ
2λ
NThe input signal light of forming, from importing with an optical fiber A the input and output diplopore optical fiber contact pins 1 at small oblique angle, through first self-focusing microlens 2 with small oblique angle, the optical axis of its light beam is by the center of first GRIN Lens, 2 output planes.On first self-focusing microlens, 2 output planes, being close to unification sheet download wavelength is λ
iNarrow band pass filter 5, wavelength X then
iDirectly see through narrow band pass filter, the whole total reflections of other wavelength signals light.The optical axis of its total reflection light beam and incident beam optical axis transmit with respect to the optical axis of first GRIN Lens 2 is symmetrical fully, and focus on the port of another root optical fiber of input and output diplopore optical fiber contact pins B, from optical fiber B coupling output.λ
iWavelength signals light directly passes narrow band filter slice, and the optical axis of light beam becomes a low-angle with systematic optical axis, and again because narrow-band-filter has certain thickness, and the depth of parallelism also has certain error, can cause λ
iThe position that the optical axis of wavelength signals light beam incides second GRIN Lens, 3 end faces is equipped with certain variation with respect to ideal bit.The error of the depth of parallelism can cause the transmission direction random variation of beam optical axis.It is right that this patent adds an adjustable wedge for this reason, and wherein a slice wedge is fixed, and another sheet can carry out translation or rotation debugging along binding face, can will download λ
iThe optical axis of the transmission direction of flashlight is corrected, and adjusts to perfect condition, and the desirable transmission direction transmission along second GRIN Lens 3 and download optical fiber contact pins 4 assemblies focuses on the download optical fiber C port of downloading optical fiber contact pins, with the coupling efficiency output of the best.This structure and debud mode are simple and effective.To pass the right thickness of wedge relevant with the thickness and the component error of narrow band pass filter with downloading light beam for the angle of wedge.Generally speaking, the thickness of narrow band pass filter is 2mm, causes the about 40 μ m left and right sidesing shiftings of light path, and the wedge angle can be for about 5-10 degree.When the right relative position of parallel mobile wedge, download light beam and pass wedge right thickness is variable, about about 0.5mm-2.0mm, change greatly, roughly can carry out light path and correct.
In order to obtain the multiplexing demultiplexing device of extremely low reflection, before second assembly of forming by second GRIN Lens 3 and output optical fibre contact pin 4, place an isolator 7, as shown in Figure 4, it has constituted the wavelength-division multiplex/demultiplexing assembly of a wavelength signals light extremely low reflection in upper and lower year.
The Wavelength division multiplexer/demultiplexer adjustment method that this patent proposes is simpler, at first adjusts by input and output diplopore optical fiber contact pins first assembly that first self-focusing microlens and narrow band pass filter are formed.By downloading optical fiber contact pins, the method for adjustment and first assembly of second assembly that second self-focusing microlens is formed are identical.The first assembly method of adjustment is as follows, at first input and output diplopore optical fiber contact pins 1 and first GRIN Lens 2 is placed together among the good sleeve pipe of the smooth depth of parallelism, and the two is fitted mutually fully.A branch of wavelength is λ
jIncident light from optical fiber A input, through the optical fiber A and first GRIN Lens 2, beam optical axis is by the output end face center of first GRIN Lens 2, being incident on wavelength is λ
iNarrow band pass filter on, through the total reflection of narrow band pass filter surface, wavelength is λ
jLight beam for the second time by first GRIN Lens 2, focus on and be coupled to the second optical fiber B of input and output diplopore optical fiber contact pins, adjust the relative position of the diplopore optical fiber contact pins 1 and first GRIN Lens 2, must make that from the luminous power of optical fiber B output be maximum, gummed is the diplopore optical fiber contact pins 1 and first GRIN Lens 2 fixedly, be developed into first assembly, as shown in Figure 5.By second assembly that second self-focusing microlens 3 and download optical fiber contact pins 4 are formed, the method for its adjustment and first assembly are identical.During debugging,, when a branch of light is imported from an optical fiber, adjust the relative position of second GRIN Lens 3 and download optical fiber contact pins 4, must make from the output power of another optical fiber C to be maximum at first at completely reflecting mirror of GRIN Lens end face applying.Gummed is fixed second GRIN Lens 3 and is downloaded optical fiber contact pins 4 then, takes down the total reflection eyeglass, and wherein an optical fiber blocks, and is developed into second assembly.
The upper and lower carriers division multiplex assembly of wavelength signals light, as shown in Figure 6.Two assemblies are placed the good sleeve pipe of the same smooth depth of parallelism, allow the optical axis of two assemblies place on same the straight line, four tail optical fibers are positioned at same plane.The insertion wedge is right, and upper and lower move and wherein a slice wedge is adjusted in rotation makes the λ that downloads
iThe wavelength signals light beam focuses on and is coupled among the optical fiber C of double tail fiber glass contact pin 4, and coupling is output as maximum.The wedge gummed is fixing.
N the repairable wavelength-division multiplex of wavelength light path/demultiplexing assembly constitutes as Fig. 3 or the upper and lower carriers division multiplex of a wavelength signals light/demultiplexing assembly shown in Figure 4 by N.Optical fiber B in the input-output optical fiber contact pin in the previous assembly will with the optical fiber A welding of input-output optical fiber contact pin in the next assembly.The central wavelength lambda of the narrow band pass filter in each assembly
iBe different, only can download a corresponding wavelength is λ
iFlashlight, upper and lower year N wavelength signals light of N assembly has constituted N wave-length division multiplexing demultiplexing device, as shown in Figure 7.
Claims (4)
1. repairable Wavelength division multiplexer/demultiplexer assembly of light path, by the input and output diplopore optical fiber contact pins that on light path, is arranged in order, first GRIN Lens, the narrow band pass filter of being close to the first GRIN Lens output plane, second GRIN Lens and download optical fiber contact pins are formed, wherein first GRIN Lens and second GRIN Lens are identical, download to download in fiber position and the input-output optical fiber contact pin in the optical fiber contact pins and import, the output optical fibre position becomes complete symmetric offset spread with respect to optical axis, it is right to it is characterized in that placing a wedge between the described narrow band pass filter and second GRIN Lens, wedge is vertical with light path to binding face, can be along binding face translation or rotation between the wedge.
2. the repairable Wavelength division multiplexer/demultiplexer assembly of light path as claimed in claim 1 is characterized in that the right wedge shape of described wedge is identical with physical dimension, and the angle of wedge is 1 degree-20 degree.
3. the repairable Wavelength division multiplexer/demultiplexer assembly of light path as claimed in claim 1 or 2, it is characterized in that the above wedge of light path to and second GRIN Lens between place isolator.
4. the repairable Wavelength division multiplexer/demultiplexer assembly of light path as claimed in claim 1 or 2 is characterized in that constituting N wave-length division multiplexing demultiplexing device side by side by N described assembly, and N described assembly has λ respectively
1, λ
2,---λ
NThe narrow band pass filter of N different centre wavelengths, two optical fiber of the input and output diplopore optical fiber contact pins of each assembly and two optical fiber of adjacent component input and output diplopore optical fiber contact pins are the welding of bunchiness form class connection successively, and first optical fiber that only stays first assembly input and output diplopore optical fiber contact pins is as λ
1, λ
2,---λ
NSecond optical fiber that light signal inputs or outputs end, a N assembly input and output diplopore optical fiber contact pins as and next assembly cascade welding standby port, the download optical fiber that each assembly is downloaded optical fiber contact pins is respectively as the download port of specific wavelength light signal.
The repairable Wavelength division multiplexer/demultiplexer assembly of light path as claimed in claim 3 is characterized in that constituting N wave-length division multiplexing demultiplexing device side by side by N described assembly, and N described assembly has λ respectively
1, λ
2,---λ
NThe narrow band pass filter of N different centre wavelengths, two optical fiber of the input and output diplopore optical fiber contact pins of each assembly and two optical fiber of adjacent component input and output diplopore optical fiber contact pins are the welding of bunchiness form class connection successively, and first optical fiber that only stays first assembly input and output diplopore optical fiber contact pins is as light signal λ
1, λ
2,---λ
NSecond optical fiber that inputs or outputs end, a N assembly input and output diplopore optical fiber contact pins as with the standby port of next assembly cascade welding, the download optical fiber that each assembly is downloaded optical fiber contact pins is respectively as the download port of specific wavelength light signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212490 CN2465196Y (en) | 2001-02-21 | 2001-02-21 | Optical path corrected wave division multiplexer/demultiplexer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212490 CN2465196Y (en) | 2001-02-21 | 2001-02-21 | Optical path corrected wave division multiplexer/demultiplexer unit |
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| Publication Number | Publication Date |
|---|---|
| CN2465196Y true CN2465196Y (en) | 2001-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01212490 Expired - Fee Related CN2465196Y (en) | 2001-02-21 | 2001-02-21 | Optical path corrected wave division multiplexer/demultiplexer unit |
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| CN (1) | CN2465196Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395969C (en) * | 2002-09-03 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Optical add and drop multiplexer (OADM) |
| CN101980067A (en) * | 2010-10-22 | 2011-02-23 | 中国航空工业集团公司洛阳电光设备研究所 | Infrared optical system using two optical wedges for focusing |
| CN102096185A (en) * | 2010-12-28 | 2011-06-15 | 福州高意光学有限公司 | Miniature standard tool and fine tuning method of transmission wavelength thereof |
| CN101718893B (en) * | 2009-11-06 | 2011-11-30 | 福州高意通讯有限公司 | Cascade fiber array device and application structure |
| CN105974523A (en) * | 2016-06-30 | 2016-09-28 | 苏州伽蓝致远电子科技股份有限公司 | Micro low-loss optical wave divider-multiplexer |
-
2001
- 2001-02-21 CN CN 01212490 patent/CN2465196Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395969C (en) * | 2002-09-03 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Optical add and drop multiplexer (OADM) |
| CN101718893B (en) * | 2009-11-06 | 2011-11-30 | 福州高意通讯有限公司 | Cascade fiber array device and application structure |
| CN101980067A (en) * | 2010-10-22 | 2011-02-23 | 中国航空工业集团公司洛阳电光设备研究所 | Infrared optical system using two optical wedges for focusing |
| CN102096185A (en) * | 2010-12-28 | 2011-06-15 | 福州高意光学有限公司 | Miniature standard tool and fine tuning method of transmission wavelength thereof |
| CN105974523A (en) * | 2016-06-30 | 2016-09-28 | 苏州伽蓝致远电子科技股份有限公司 | Micro low-loss optical wave divider-multiplexer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |