CN105068188A - Optical fiber filter structure for optical communication - Google Patents
Optical fiber filter structure for optical communication Download PDFInfo
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- CN105068188A CN105068188A CN201510593491.XA CN201510593491A CN105068188A CN 105068188 A CN105068188 A CN 105068188A CN 201510593491 A CN201510593491 A CN 201510593491A CN 105068188 A CN105068188 A CN 105068188A
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- Prior art keywords
- rete
- optical fiber
- layer
- layers
- film
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Filters (AREA)
- Surface Treatment Of Optical Elements (AREA)
Abstract
The invention provides an optical fiber filter structure for optical communication, comprising a communication optical fiber. The end face of the transmitting end of the communication optical fiber is plated with a filter film. The filter film includes two Ge films and three ZnS films which are alternately deposited on the end face of the transmitting end of the optical fiber, wherein the uppermost layer of the filter film is a ZnS film. An antireflection film is arranged on the transparent film, and the antireflection film includes a SiO2 film and a MgF2 film, wherein the SiO2 film is deposited on the transparent film, and the MgF2 film is deposited on the SiO2 film. According to the optical fiber filter structure, a glass substrate is omitted, and the filter film is directly sputtered on the end face of the transmitting end of the communication optical fiber. Therefore, the size of optical communication devices can be reduced effectively, and the light transmittance of optical communication devices can be improved. Detection shows that the transmittance of the filter to light in the wavelength range of 500-1200nm is up to 96%.
Description
Technical field
The present invention relates to optical communication field, particularly a kind of optical fiber filter structure for optical communication.
Background technology
Optical communication refers to the communication mode realized as information carrier using light, can be divided into lasercom and optical fiber communication two kinds by the difference of transmission medium.Optical communication has the advantages such as message capacity is large, transmission range length, electromagnetism interference, transmission quality is good, signal cross-talk is little, good confidentiality, is the final goal of future transmission network Development, has boundless market outlook.Optical communication is that the recovery of different wave length is used in an optical fiber by photo-coupler or optical multiplexer, different wavelength postings different information, be used to carry out wavelength chooses by optical filter at receiving end, from numerous wavelength, pick out required wavelength, and the light except this wavelength will be rejected and passes through.
In optical communication product, the critical piece of optical filter is optical filter, and it is important that optical filter plays a part to cause pass in optical communication product.Along with developing rapidly of space technology and optical device, the application of infrared optical system more and more comes into one's own, light signal signal has to pass through the filtering that optical filter, protection window etc. carry out Time and place, this just requires that light is transmitting with maximal value as much as possible by its radiant quantity during optical filter, so just needs on optical filter, be coated with according to different requirements the film met the demands.In the prior art, in order to increase transmittance, usually need the rete being coated with different-thickness on optical filter.Along with communication facilities is constantly to miniaturization, microminiaturized future development, the volume how reducing device becomes a lot of device fabrication producer and needs a technical matters that will solve badly.Some manufacturer by plated film direct plating on film, direct in use film to be opened from plated film, film plating layer is used as optical filter, although adopt the volume that can reduce device in this way to a certain extent, but this film plating layer insufficient strength, therefore and impracticable be very easy to damage.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of optical fiber structure without the need to using light filter just can carry out filtering.
For achieving the above object and other relevant objects, the invention provides a kind of optical fiber filter structure for optical communication, comprise telecommunication optical fiber, described telecommunication optical fiber is fixed on mount pad, the transmitting terminal end face of described telecommunication optical fiber is coated with filter membranous layer, described filter membranous layer comprises alternating deposit at the Ge rete of fibre optical transmission end face and ZnS rete, described Ge rete is two-layer, ZnS rete is three layers, the superiors of described filter membranous layer are ZnS rete, described light-transmissive film layer is also provided with antireflective coating, and described antireflective coating comprises a SiO
2rete and a MgF
2rete, described SiO
2rete is deposited on described light-transmissive film layer, described MgF
2rete is deposited on described SiO
2on rete.
Preferably, the silicon nitride layer of one deck containing silica nano material is also provided with between the transmitting terminal end face of described filter membranous layer and described telecommunication optical fiber.
Preferably, the thickness of described silicon nitride layer is 35-72nm.
Preferably, from inside to outside, ground floor ZnS thicknesses of layers is 102-105nm to described filter membranous layer, ground floor Ge thicknesses of layers is 345-350nm, second layer ZnS thicknesses of layers is 153-157.5nm, and second layer Ge thicknesses of layers is 690-700nm, third layer ZnS thicknesses of layers is 204-210nm.
Preferably, described SiO
2thicknesses of layers is 125-126nm, MgF
2thicknesses of layers is 49-51nm.
Preferably, described antireflective coating is also provided with one deck diamond crystal rete, described diamond crystal thicknesses of layers is 78-79nm.
Optical fiber filter structure for optical communication disclosed by the invention has following beneficial effect: the glass substrate that this optical communication fiber filter structure saves, directly by filter membranous layer sputter on the end face of telecommunication optical fiber transmitting terminal, so not only can effectively reduce the volume of optic communication device, and the transmittance of optic communication device can be improved, can more than 96% be reached according to this optical filter of detection to the light penetrability of wavelength between 500-1200nm; On antireflective coating, be also provided with diamond crystal rete simultaneously, optical fiber can be made like this to have high hardness and good physical strength, resistance to acids and bases very good, not easily deliquescence, can use under various evil slightly environment, this optical fiber filter structure coating layers is less, and technique is simple, while raising transmittance, effectively reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the structural representation of embodiment of the present invention correspondence end face coating.
Fig. 3 is the performance plot of embodiment of the present invention transmittance.
Element numbers explanation
1, optical fiber 11, transmitting terminal end face 110, silicon nitride layer 111, ground floor ZnS rete 112, ground floor Ge rete 113, second layer ZnS rete 114, second layer Ge rete 115, third layer ZnS rete 116, SiO
2rete 117, MgF
2rete 118, diamond crystal rete 2, mount pad.
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 3.Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 1, 2, the invention provides a kind of optical fiber filter structure for optical communication, it comprises telecommunication optical fiber 1, and for the ease of installing, telecommunication optical fiber 1 is fixed on mount pad 2, and mount pad 2 is arranged on the box body of communication component.Filter construction different from original structure is different, directly on telecommunication optical fiber 1 transmitting terminal end face 11, is coated with filter membranous layer, and does not arrange optical filter at wave filter.In order to increase adhesion, before sputter filter membranous layer, the silicon nitride layer 110 of one deck containing silica nano material can be first first set on transmitting terminal end face 11, the thickness of silicon nitride layer 110 is not easily excessive also not easily too small, cross conference and affect transmittance, too small, do not have the effect increasing adhesion, as a kind of optimal way, the thickness of the silicon nitride layer 110 of silica nano material can be arranged between 35-72nm.
Filter membranous layer is arranged on silicon nitride layer 110, and filter membranous layer comprises alternating deposit at the Ge rete of fibre optical transmission end face and ZnS rete, and wherein Ge rete is two-layer, ZnS rete is three layers, the superiors of filter membranous layer are ZnS rete, and light-transmissive film layer is also provided with antireflective coating, and antireflective coating comprises a SiO
2rete and a MgF
2rete, SiO
2rete is deposited on described light-transmissive film layer, MgF
2rete is deposited on SiO
2on rete.
As a kind of embodiment, filter membranous layer from inside to outside, ground floor ZnS rete 111 thickness is 102-105nm, ground floor Ge rete 112 thickness is 345-350nm, second layer ZnS rete 113 thickness is 153-157.5nm, second layer Ge rete 114 thickness is 690-700nm, third layer ZnS rete 115 thickness is 204-210nm, SiO
2rete 116 thickness is 125-126nm, MgF
2rete 117 thickness is 49-51nm.In order to increase the intensity of filter membranous layer, antireflective coating is also provided with one deck diamond crystal rete 118, diamond crystal rete 118 thickness is 78-79nm.The refractive index of hard rock crystalline film 4 and SiO
2the refractive index of rete is identical, therefore can not affect the transmittance of optical filter, effectively can increase hardness and the physical strength of fiber end face simultaneously, and therefore resistance to acids and bases is better, not easily deliquescence, can use under various evil slightly environment.
The glass substrate that this optical communication fiber filter structure saves, directly by filter membranous layer sputter on the end face of telecommunication optical fiber transmitting terminal, so not only can effectively reduce the volume of optic communication device, and the transmittance of optic communication device can be improved, can reach for more than 96% (as shown in Figure 3) according to this optical filter of detection to the light penetrability of wavelength between 500-1200nm; On antireflective coating, be also provided with diamond crystal rete simultaneously, optical fiber can be made like this to have high hardness and good physical strength, resistance to acids and bases very good, not easily deliquescence, can use under various evil slightly environment, this optical fiber filter structure coating layers is less, and technique is simple, while raising transmittance, effectively reduce production cost.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (6)
1. the optical fiber filter structure for optical communication, comprise telecommunication optical fiber, described telecommunication optical fiber is fixed on mount pad, it is characterized in that: the transmitting terminal end face of described telecommunication optical fiber is coated with filter membranous layer, described filter membranous layer comprises alternating deposit at the Ge rete of fibre optical transmission end face and ZnS rete, and described Ge rete is two-layer, ZnS rete is three layers, the superiors of described filter membranous layer are ZnS rete, and described light-transmissive film layer is also provided with antireflective coating, and described antireflective coating comprises a SiO
2rete and a MgF
2rete, described SiO
2rete is deposited on described light-transmissive film layer, described MgF
2rete is deposited on described SiO
2on rete.
2. the optical fiber filter structure for optical communication according to claim 1, is characterized in that: be also provided with the silicon nitride layer of one deck containing silica nano material between the transmitting terminal end face of described filter membranous layer and described telecommunication optical fiber.
3. the optical fiber filter structure for optical communication according to claim 2, is characterized in that: the thickness of described silicon nitride layer is 35-72nm.
4. the optical fiber filter structure for optical communication according to claim 1, it is characterized in that: described filter membranous layer from inside to outside, ground floor ground floor ZnS thicknesses of layers is 102-105nm, ground floor Ge thicknesses of layers is 345-350nm, second layer ZnS thicknesses of layers is 153-157.5nm, second layer Ge thicknesses of layers is 690-700nm, third layer ZnS thicknesses of layers is 204-210nm.
5. the optical fiber filter structure for optical communication according to claim 1, is characterized in that: described SiO
2thicknesses of layers is 125-126nm, MgF
2thicknesses of layers is 49-51nm.
6. the optical fiber filter structure for optical communication according to claim 1, it is characterized in that: described antireflective coating is also provided with one deck diamond crystal rete, described diamond crystal thicknesses of layers is 78-79nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593491.XA CN105068188A (en) | 2015-09-17 | 2015-09-17 | Optical fiber filter structure for optical communication |
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|---|---|---|---|
| CN201510593491.XA CN105068188A (en) | 2015-09-17 | 2015-09-17 | Optical fiber filter structure for optical communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866887A (en) * | 2021-10-08 | 2021-12-31 | 深圳市东彦通信科技有限公司 | Optical device and manufacturing method thereof |
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2015
- 2015-09-17 CN CN201510593491.XA patent/CN105068188A/en active Pending
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| US5208886A (en) * | 1990-01-17 | 1993-05-04 | At&T Bell Laboratories | Methods of making an optical fiber filter |
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|---|---|---|---|---|
| CN113866887A (en) * | 2021-10-08 | 2021-12-31 | 深圳市东彦通信科技有限公司 | Optical device and manufacturing method thereof |
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Application publication date: 20151118 |
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