CN110794500A - Filtering self-focusing lens and optical communication passive optical device - Google Patents

Filtering self-focusing lens and optical communication passive optical device Download PDF

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Publication number
CN110794500A
CN110794500A CN201911141896.4A CN201911141896A CN110794500A CN 110794500 A CN110794500 A CN 110794500A CN 201911141896 A CN201911141896 A CN 201911141896A CN 110794500 A CN110794500 A CN 110794500A
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China
Prior art keywords
filter
light
self
focusing lens
film
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CN201911141896.4A
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Chinese (zh)
Inventor
张于帅
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Suzhou Hao Lian Photoelectric Technology Co Ltd
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Suzhou Hao Lian Photoelectric Technology Co Ltd
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Priority to CN201911141896.4A priority Critical patent/CN110794500A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • 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
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • 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
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • 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
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • G02B6/327—Optical coupling means having lens focusing means positioned between opposed fibre ends with angled interfaces to reduce reflections

Abstract

A filtering self-focusing lens and an optical communication passive optical device relate to the field of optical elements. The filter self-focusing lens comprises a self-focusing lens body and a filter film, wherein the self-focusing lens body is provided with a first light-emitting surface for outputting parallel light, the filter film is coated on the first light-emitting surface, the filter film is formed by alternately stacking high-refractive-index film layers and low-refractive-index film layers from the direction close to the first light-emitting surface to the direction far away from the first light-emitting surface, and the high-refractive-index film layers are made of silicon hydride. The filtering self-focusing lens and the optical communication passive optical device are both plated with the filter film to replace the optical filter on the first light-emitting surface, so that the preparation cost is effectively saved, meanwhile, the high-refractive-index film layer is made of silicon hydride and has a refractive index as high as 3.6 in a wavelength region, the thickness of the filter film is effectively reduced, the process difficulty is greatly reduced, the yield of products is improved, and the effect of combining the self-focusing lens and the optical filter is achieved.

Description

Filtering self-focusing lens and optical communication passive optical device
Technical Field
The application relates to the field of optical elements, in particular to a filtering self-focusing lens and an optical communication passive optical device.
Background
The existing optical communication three-port device 30, as shown in fig. 1, is composed of two self-focusing lenses 210 with antireflection films and a CWDM wavelength division multiplexing filter 310, and these three components have high technical difficulty, high required precision and high price. It is necessary to innovate the existing CWDM wdm filter technology.
If the core film CWDM filter film of the CWDM wavelength division multiplexing filter is directly plated on the surface of the self-focusing lens, the effect of combining two parts is achieved, but the quality problem easily occurs on the surface of the self-focusing lens in the plating process, and the process difficulty is large.
Disclosure of Invention
The application provides a filtering self-focusing lens and an optical communication passive optical device, so as to improve the problems.
The filter self-focusing lens provided by the embodiment of the first aspect of the present application includes a self-focusing lens body and a filter, the self-focusing lens body has a first light emitting surface for outputting parallel light, the filter is coated on the first light emitting surface, the filter is formed by alternately stacking a high refractive index film layer and a low refractive index film layer from a direction close to the first light emitting surface to a direction far away from the first light emitting surface, and the high refractive index film layer is made of silicon hydride.
The applicant has found that the essential reasons for the quality problems and the processing difficulties that tend to occur during the plating process at the surface of the self-focusing lens are due to the large thickness of the existing filters, such as the CWDM wdm filter. Therefore, the present application is proposed based on this finding. According to the self-focusing lens provided by the embodiment of the application, the filter film is plated on the first light emitting surface to replace the optical filter, so that the preparation cost is effectively saved, meanwhile, the high-refractive-index film layer is made of silicon hydride and has a refractive index as high as 3.6 in a wavelength domain, the thickness of the filter film is effectively reduced, the process difficulty is greatly reduced, the yield of products is improved, and the effect of combining the self-focusing lens and the optical filter is achieved.
In addition, the self-focusing lens according to the embodiment of the present application has the following additional technical features:
in some embodiments shown herein, in combination with the first aspect, the low refractive index film layer is made of silicon dioxide.
Wherein, the adhesiveness between the silicon dioxide layer and the hydrogenated silicon layer is good, and the quality of the finally prepared light filtering film is good.
In combination with the first aspect, the present application illustrates some embodiments wherein the filter is a CWDM filter.
In some embodiments shown in the present application, a low refractive index film layer is disposed on a side of the filter film close to the first light emitting surface, and a low refractive index film layer is disposed on a side of the filter film close to the air.
One side of the filter film, which is close to the first light-emitting surface, is a low-refractive-index film layer so as to ensure the binding force and stability of the filter film and the self-focusing lens.
Optionally, in some embodiments shown in the present application, the film structure of the filter film includes: baseband | LH2LHL (HLH 2L HLHL)8H LHL | air side.
The first light emitting surface is used as a substrate, H represents a high-refractive-index film layer with the wavelength of 1/4, L represents a low-refractive-index film layer with the wavelength of 1/4, the numbers in front of H and L represent thickness coefficients, and the number above the bracket on the right represents the repetition number of the (HLH 2L HLHL) layer.
The final filter film obtained by adopting the film system structure has stable quality and good filtering effect.
It should be noted that, in addition to the above film system structure, other film system structures may be adopted according to actual requirements, wherein the thickness coefficient, the repetition coefficient, specifically the arrangement manner of the high refractive index film layer and the low refractive index film layer, and the like may be changed according to actual requirements, and all belong to the protection scope of the present application.
In some embodiments shown in the present application, the self-focusing lens body has a first light inlet surface corresponding to the first light outlet surface, and the first light inlet surface is plated with a first antireflection film.
By the arrangement of the first antireflection film, the intensity of reflected light is reduced, thereby increasing the intensity of transmitted light.
In some embodiments, the filter film is coated on the first light emitting surface by a medium frequency magnetron sputtering method.
The process is easy to operate and mature, and the prepared film has high flatness and effectively reduces the preparation difficulty.
According to the optical communication passive optical device of the second aspect of the present application, the optical communication passive optical device includes the filtering self-focusing lens and the self-focusing lens provided by the first aspect of the present application, the self-focusing lens has a second light inlet surface and a second light outlet surface which are opposite to each other, and the second light inlet surface and the first light outlet surface are opposite to each other and distributed at intervals, so that the self-focusing lens receives the parallel light output by filtering from the first light outlet surface, and outputs the parallel light through the second light outlet surface after being collected.
Through the combination of the filtering self-focusing lens and the self-focusing lens, the precision of the obtained optical communication passive optical device is high, and the manufacturing cost is effectively reduced.
In some embodiments shown in the present application, in combination with the second aspect, the second light incident surface is plated with a second antireflection film, and/or the second light emitting surface is plated with a third antireflection film.
With the above arrangement, the intensity of reflected light is reduced by the arrangement of the second antireflection film and the third antireflection film, thereby increasing the intensity of transmitted light.
In some embodiments shown in this application, in combination with the second aspect, the optical communication passive optical device further includes a first optical fiber and a second optical fiber respectively connected to the first light entering surface through optical signals, and a third optical fiber connected to the second light exiting surface through optical signals, where an optical signal transmitted by the first optical fiber and received by the first light entering surface is transmitted through the filtering autofocus lens to form parallel light, after the parallel light is filtered by the filtering film, part of the optical signal is transmitted through the self-focusing lens and output to the third optical fiber, and the remaining optical signal is reflected by the filtering film and focused to the second optical fiber through the filtering autofocus lens.
That is, the optical communication passive optical device provided by the present application is an optical communication three-port device.
The self-focusing lens and the optical communication passive optical device provided by the embodiment of the application have the beneficial effects that:
the filter film replaces the optical filter, so that the preparation cost is effectively saved, meanwhile, the high-refractive-index film layer is made of silicon hydride and has a refractive index as high as 3.6 in a wavelength domain, the thickness of the filter film is effectively reduced, the yield is effectively improved, the process difficulty and the requirement on equipment are greatly reduced, the problem of quality which is easy to occur in the plating process is solved, and the effect of combining the self-focusing lens and the optical filter is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a conventional optical communication three-port device;
fig. 2 is a schematic structural diagram of a self-focusing lens provided in embodiment 1;
fig. 3 is a diagram illustrating a film structure and a refractive index of a filter film according to embodiment 1;
FIG. 4 is a diagram showing the relationship between the film structure and the refractive index of the CWDM WDM filter;
FIG. 5 is a plot of the measured spectrum of the filtered self-focusing lens provided in example 1 at 0-30 incident;
FIG. 6 is a measured spectral curve of the CWDM WDM wavelength division multiplexing filter at 0-30 incident angle;
fig. 7 is a schematic structural diagram of an optical communication passive optical device provided in embodiment 2.
Icon: 100-filter self-focusing lens; 101-a self-focusing lens body; 102-a filter film; 103-a first antireflection film; 20-optical communication passive optical devices; 210-a self-focusing lens; 211-a second antireflective film; 213-third antireflection film; 221-a first optical fiber; 223-a second optical fiber; 225-a third optical fiber; 310-CWDM wavelength division multiplexing filter; 30-optical communication three-port device.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It should be noted that the terms "first," "second," "third," and the like are used merely to distinguish one description from another, and are not intended to indicate or imply relative importance.
If the core film CWDM filter film of the CWDM wavelength division multiplexing filter is directly plated on the surface of the self-focusing lens, the effect of combining two parts is achieved, but the quality problem easily occurs on the surface of the self-focusing lens in the plating process, and the process difficulty is large.
In the case that the effect is still not ideal after the replacement process and the improvement of the process parameters are performed, the applicant finds that the essential reason is caused by the larger thickness of the existing filter, such as the CWDM wdm filter. Specifically, because the thickness of the existing filter film is large, the number of the film layers is large, the film coating time is long, the requirements on the precision of a film coating machine and the stability of long-time work are very high, the requirements on the process are also high, each film layer has an error, the accumulated error is increased along with the increase of the number of the layers, and the yield is greatly reduced.
The present application is hereby presented.
The features and properties of the present application are described in further detail below with reference to examples.
Example 1
Referring to fig. 2, a filter self-focusing lens 100 mainly includes a self-focusing lens body 101 and a filter 102.
The self-focusing lens body 101 includes a first light emitting surface opposite to the first light incident surface, and a first light incident surface corresponding to the first light emitting surface. The first light emitting surface is used for outputting parallel light. The self-focusing lens body 101 is a green lens, which is a conventional structure, and reference is made to the related art without specific description.
Specifically, the first light emitting surface is coated with a filter 102, the filter 102 is formed by alternately laminating a high refractive index film layer and a low refractive index film layer in a direction from the first light emitting surface to the first light emitting surface, and the high refractive index film layer is made of silicon hydride. The filter film 102 is plated on the first light emitting surface to replace an optical filter, so that the preparation cost is effectively saved, meanwhile, the high-refractive-index film layer is made of hydrogenated silicon and has a refractive index as high as 3.6 in a wavelength domain, the thickness of the filter film 102 is effectively reduced, the quality problem of products is greatly reduced, the process difficulty is greatly reduced, and the effect of the conventional CWDM wavelength division multiplexing optical filter 310 is achieved.
It is noted that the low index film layer has a lower refractive index than the high index film layer, including but not limited to SiO2Or YbF3And the like, and those skilled in the art can make appropriate selections according to actual needs.
Since the adhesion between the silicon dioxide layer and the hydrogenated silicon layer is good, and the quality of the finally obtained filter film 102 is good, in this embodiment, the low refractive index film layer is made of silicon dioxide.
The filter 102 includes, but is not limited to, a multi-layer dielectric film reflective narrow-band separation filter, an F-P resonator filter, a CWDM (sparse wavelength division multiplexing) filter, and the like, and in this embodiment, the filter 102 is a CWDM filter.
Meanwhile, since the filter self-focusing lens 100 is made of a glass material, the structure is special, and the environmental stability is poor, one side of the filter film 102 close to the first light-emitting surface is a low-refractive-index film layer, so as to ensure the bonding force and stability of the filter film 102 and the filter self-focusing lens 100. Further, the side of the filter film 102 close to the air is a low refractive index film layer.
Optionally, in this embodiment, the film structure of the filter film 102 includes: baseband | LH2LHL (HLH 2L HLHL)8H LHL | air side; the first light emitting surface is used as a substrate, namely the substrate is glass, H represents a high refractive index film layer with the wavelength of 1/4, L represents a low refractive index film layer with the wavelength of 1/4, the numbers in front of H and L represent thickness coefficients, and the number above the bracket on the right represents the repetition times of the (HLH 2L HLHL) layer. Tying with the above filmThe final filter film 102 has stable quality and good filtering effect.
It should be noted that, in addition to the above-mentioned film system structure, the filter film 102 may also adopt other film system structures according to actual requirements, wherein the thickness coefficient, the repetition coefficient, specifically the arrangement manner of the high refractive index film layer and the low refractive index film layer, the specific number of layers, and the like, for example, the thickness coefficient is 1 to 9, the repetition coefficient is 2 to 20, the specific number of layers is 20 to 200, and the like, may be changed according to actual requirements, and as long as the high refractive index film layer is prepared by using hydrogenated silicon, the solution for reducing the thinness of the filter film 102 to solve the technical problem the same as that of the present application, all fall within the protection scope of the present application.
It should be noted that there are various ways to plate the filter layer structure of the filter film 102 on the first light emitting surface, such as chemical deposition methods such as plasma enhanced chemical vapor deposition, and physical deposition methods such as rf sputtering, where the rf sputtering method includes but is not limited to magnetron sputtering technology and pulse sputtering technology, and those skilled in the art can perform limitation according to actual requirements, specifically, for example, adopt a medium frequency magnetron sputtering method, the preparation method is complete, the film flatness is high, and specific operating parameters can refer to related technologies.
In order to make the filtering self-focusing lens 100 realize the function of the CWDM wavelength division multiplexing filter 310 and achieve the combined effect of the CWDM wavelength division multiplexing filter 310 and the self-focusing lens 210, optionally, the first light incident surface is plated with the first antireflection film 103. By the provision of the first antireflection film 103, the intensity of reflected light is reduced, thereby increasing the intensity of transmitted light.
The first antireflection film 103 may be formed by a plurality of plating methods, and a medium-frequency magnetron sputtering method is adopted in the present application.
In order to verify the difference between the film system design provided by the present application and the film system design of the CWDM wavelength division multiplexing filter 310, the following comparative analysis is performed:
the conventional film system structure of the CWDM wavelength division multiplexing filter 310 is: base end |1.175(0.5L H0.5.5L)29(HL)2H 6L H(LH)2L(HL)3H 4L H(LH)3L(HL)3H 6L H (LH)3L(HL)3H 6L H (LH)3L (HL)3H6L H (LH)3L (HL)3H 6L H(LH)3L(HL)3H 4L H(LH)3L(HL)2H 6L H(LH)1The meaning of each parameter of the L1.3836 H1.2754L | air end is the same as that of the film system structure of the filter film 102 provided in the present application, and details are not described herein, wherein the high refractive index film layer in the film system structure of the CWDM wavelength division multiplexing optical filter 310 is a tantalum pentoxide film layer, and the low refractive index film layer is a silicon dioxide film layer.
Fig. 3 is a diagram showing a correspondence between a film structure and a refractive index of the filter film 102 obtained by the film design provided in the present application, and fig. 4 is a diagram showing a correspondence between a film structure and a refractive index of the CWDM wavelength division multiplexing filter 310, where the convex portions in fig. 3 and 4 represent H, and a gap formed between two H represents L. As can be seen from comparing fig. 2 and fig. 3, the physical thickness of the film structure of the conventional CWDM wavelength division multiplexing filter 310 is 42454.3nm, and the physical thickness of the film structure of the filter 102 obtained by the film system design provided in the present application is 18652.1nm, which effectively reduces the thickness of the filter 102.
Further, fig. 5 is a measured spectrum curve of the filter self-focusing lens 100 plated with the film system structure according to the present embodiment at an incidence angle of 0 to 30 °, wherein the first light incident surface of the filter self-focusing lens 100 is plated with a first antireflection film 103. Fig. 6 is a plot of the measured spectrum of the CWDM wavelength division multiplexing filter 310 at 0-30 deg. incidence. Note that the center wavelength of the elements of fig. 5 and 6 is 1271 nm.
It should be noted that the first light incident surface of the filtering self-focusing lens 100 is plated with the first antireflection film 103, and the side of the CWDM wavelength division multiplexing filter 310 away from the CWDM film system structure is also plated with the first antireflection film 103.
Comparing fig. 5 and fig. 6, the light transmission effects of the two are almost the same, that is, the filtering self-focusing lens 100 provided by the present application can completely replace the film structure of the conventional CWDM wavelength division multiplexing filter 310. That is, the filtering autofocus lens 100 can be used to replace the original combination of the green lens + CWDM wdm filter 310.
Example 2
Referring to fig. 7, the present embodiment provides an optical communication passive optical device 20, which mainly includes the filtering self-focusing lens 100 provided in embodiment 1, a commercially available self-focusing lens 210, a first optical fiber 221, a second optical fiber 223, and a third optical fiber 225, that is, the optical communication passive optical device 20 belongs to an optical communication three-port passive optical device. The filtering self-focusing lens 100, the first optical fiber 221, and the second optical fiber 223 constitute an input end of the optical communication passive optical device 20, the self-focusing lens 210 and the third optical fiber 225 constitute an output end of the optical communication passive optical device 20, wherein the first optical fiber 221 and the second optical fiber 223 constitute a dual optical fiber head. That is, the filter autofocus lens 100 converges light with the autofocus lens 210 through the filter 102, wherein the filter autofocus lens 100 and the autofocus lens 210 are opposite and spaced apart from each other.
Specifically, the self-focusing lens 210 has a second light-entering surface and a second light-exiting surface opposite to each other, and the second light-entering surface and the first light-exiting surface are distributed at intervals, so that the self-focusing lens 210 receives the parallel light output by the first light-exiting surface after being filtered, and outputs the parallel light through the second light-exiting surface after being collected. Due to the use of the filtering self-focusing lens 100, the precision of the optical communication passive optical device 20 is high, and the manufacturing cost is effectively reduced.
The second light-entering surface is plated with a second antireflection film 211, and/or the second light-exiting surface is plated with a third antireflection film 213. In this embodiment, the second light incident surface is plated with a second antireflection film 211, and the second light emitting surface is plated with a third antireflection film 213. By providing the second antireflection film 211 and the third antireflection film 213, the intensity of reflected light is reduced, and the intensity of transmitted light is increased.
Specifically, the first optical fiber 221 and the second optical fiber 223 are respectively coupled to the first light-entering surface to realize optical signal connection, and the third optical fiber 225 is coupled to the second light-exiting surface to realize optical signal connection.
The optical signal transmitted by the first optical fiber 221 and received by the first light inlet surface is transmitted by the filtering self-focusing lens 100 to form parallel light, after the parallel light is filtered by the filter film 102, part of the optical signal is transmitted and output to the third optical fiber 225 through the self-focusing lens 210, the rest of the optical signal is reflected by the filter film 102 and collected to the second optical fiber 223 through the filtering self-focusing lens 100, so that the light passing through the optical filter is selected, only the light in a set wavelength domain is transmitted, and other light is reflected back, so that the function of filtering or splitting the wavelength of the optical signal is realized.
Besides, the optical passive optical device 20 further includes a housing, a connector, etc., and the detailed configuration refers to the related art of the optical communication three-port device 30 shown in fig. 1, for example, and will not be described here.
In conclusion, the self-focusing lens and the optical communication passive optical device provided by the application have the advantages of simple structure and convenience in use, not only effectively reduce the manufacturing difficulty, but also improve the yield of products, and simultaneously achieve the effect of combining the self-focusing lens and the optical filter.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The self-focusing lens is characterized by comprising a self-focusing lens body and a filter film, wherein the self-focusing lens body is provided with a first light-emitting surface for outputting parallel light, the filter film is coated on the first light-emitting surface, the filter film is formed by alternately stacking a high-refractive-index film layer and a low-refractive-index film layer from the direction close to the first light-emitting surface to the direction far away from the first light-emitting surface, and the high-refractive-index film layer is made of silicon hydride.
2. The filter autofocus lens of claim 1, wherein the low refractive index film layer is made of silicon dioxide.
3. The filter autofocus lens of claim 1, wherein the filter is a CWDM filter.
4. The filter self-focusing lens as claimed in any one of claims 1 to 3, wherein a side of the filter film close to the first light emitting surface is a low refractive index film layer, and a side of the filter film close to the air is a low refractive index film layer.
5. The filter autofocus lens of any of claims 1 to 3, wherein the film structure of the filter film comprises: baseband | LH2LHL (HLH 2L HLHL)8H LHL | air side;
and taking the first light emitting surface as a substrate, H represents a high-refractive-index film layer with the wavelength of 1/4, L represents a low-refractive-index film layer with the wavelength of 1/4, the numbers in front of H and L represent thickness coefficients, and the number above the bracket on the right represents the repetition times of the (HLH 2L HLHL) layer.
6. The filter self-focusing lens as claimed in any one of claims 1 to 3, wherein the self-focusing lens body has a first light inlet surface corresponding to the first light outlet surface, and the first light inlet surface is plated with a first antireflection film.
7. The filter self-focusing lens as claimed in any one of claims 1 to 3, wherein the filter film is coated on the first light emitting surface by medium frequency magnetron sputtering.
8. An optical communication passive optical device, comprising the filtering self-focusing lens and the self-focusing lens as claimed in any one of claims 1 to 7, wherein the self-focusing lens has a second light inlet surface and a second light outlet surface which are opposite to each other, and the second light inlet surface is opposite to the first light outlet surface and spaced apart from the first light outlet surface, so that the self-focusing lens receives the parallel light output by the filtering from the first light outlet surface, and the parallel light is collected and output by the second light outlet surface.
9. An optical communication passive optical device as claimed in claim 8, wherein the second light entering surface is coated with a second antireflection film, and/or the second light exiting surface is coated with a third antireflection film.
10. The optical communication passive optical device according to claim 8 or 9, further comprising a first optical fiber and a second optical fiber respectively connected to the first light entrance surface by optical signals, and a third optical fiber connected to the second light exit surface by optical signals, wherein the optical signal received by the first light entrance surface and transmitted by the first optical fiber is transmitted by the filter self-focusing lens to form parallel light, after the parallel light is filtered by the filter, part of the optical signal is transmitted and output to the third optical fiber by the self-focusing lens, and the rest of the optical signal is reflected by the filter and focused to the second optical fiber by the filter self-focusing lens.
CN201911141896.4A 2019-11-20 2019-11-20 Filtering self-focusing lens and optical communication passive optical device Pending CN110794500A (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN112114402A (en) * 2020-10-12 2020-12-22 东莞市微科光电科技有限公司 CWDM optical filter
CN112198593A (en) * 2020-10-12 2021-01-08 东莞市微科光电科技有限公司 Manufacturing method of CWDM optical filter

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Application publication date: 20200214