CN110308528B - Single-fiber bidirectional optical device - Google Patents
Single-fiber bidirectional optical device Download PDFInfo
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- CN110308528B CN110308528B CN201910679610.1A CN201910679610A CN110308528B CN 110308528 B CN110308528 B CN 110308528B CN 201910679610 A CN201910679610 A CN 201910679610A CN 110308528 B CN110308528 B CN 110308528B
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- optical filter
- mounting groove
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- 230000003287 optical effect Effects 0.000 title claims abstract description 112
- 239000000835 fiber Substances 0.000 title claims abstract description 26
- 230000002457 bidirectional effect Effects 0.000 title abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 62
- 239000011358 absorbing material Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000008878 coupling Effects 0.000 abstract description 10
- 238000010168 coupling process Methods 0.000 abstract description 10
- 238000005859 coupling reaction Methods 0.000 abstract description 10
- 230000001681 protective effect Effects 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/003—Light absorbing elements
-
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
-
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/4236—Fixing or mounting methods of the aligned elements
- G02B6/424—Mounting of the optical light guide
-
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/4236—Fixing or mounting methods of the aligned elements
- G02B6/4244—Mounting of the optical elements
-
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/4236—Fixing or mounting methods of the aligned elements
- G02B6/4245—Mounting of the opto-electronic elements
-
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a single-fiber bidirectional optical device. The single-fiber bidirectional optical device comprises: the base is internally provided with a containing cavity and a mounting groove communicated with the containing cavity; the laser is arranged on one side of the base and at least partially arranged in the accommodating cavity; the optical fiber assembly is arranged on the other side of the base, and at least part of the optical fiber assembly is arranged in the accommodating cavity; the optical filter is arranged in the accommodating cavity and positioned between the laser and the optical fiber assembly, and light rays emitted by the laser are transmitted to the optical fiber assembly through the optical filter; and the wave absorbing element is arranged in the mounting groove to absorb the light rays which pass through the optical filter and are reflected in the base. The technical scheme of the invention can avoid crosstalk formed by coupling of reflected light to light emission and coupling of light reception, and ensure normal transmission of optical signals.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a single-fiber bidirectional optical device.
Background
The single-fiber bidirectional optical device (Bi-Direction Optical Subassembly, BOSA) can realize transmission of transmitting signals and transmission of receiving signals in a single optical fiber, so that a transmitting optical path and a receiving optical path are required to be realized in the base. At present, an optical filter is arranged in a base, an optical signal transmitted by an optical fiber is reflected to a detector, however, in the single-fiber bidirectional optical device, a light ray part emitted by a laser directly enters the optical fiber after passing through the optical filter, and the other part is reflected in the base at the optical filter, so that crosstalk is formed in receiving the optical signal.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a single-fiber bidirectional optical device, which aims to avoid crosstalk formed by coupling of reflected light to light emission and coupling of reflected light to light reception and ensure normal transmission of optical signals.
In order to achieve the above object, the present invention provides a single-fiber bidirectional optical device, comprising:
the base is internally provided with a containing cavity and a mounting groove communicated with the containing cavity;
the laser is arranged on one side of the base and at least partially arranged in the accommodating cavity;
the optical fiber assembly is arranged on the other side of the base, and at least part of the optical fiber assembly is arranged in the accommodating cavity;
the optical filter is arranged in the accommodating cavity and positioned between the laser and the optical fiber assembly, and light rays emitted by the laser are transmitted to the optical fiber assembly through the optical filter; and
The wave absorbing element is arranged in the mounting groove and used for absorbing light rays which pass through the optical filter and are reflected in the base.
Optionally, the wave absorbing element is located below the optical filter and is obliquely disposed in the mounting groove.
Optionally, defining the inclination angle between the wave absorbing element and the horizontal line as α, the relationship is satisfied: alpha is more than or equal to 22 degrees and less than or equal to 30 degrees.
Optionally, the notch of the mounting groove is arranged corresponding to the optical filter, and a blocking part is arranged at the notch of the mounting groove and is used for blocking light rays from being reflected outside the mounting groove through the wave absorbing element.
Optionally, a wave absorbing material layer is further disposed on a surface of the optical filter facing the optical fiber assembly, and the wave absorbing material layer is located at an end portion of the optical filter adjacent to the wave absorbing element.
Optionally, an end surface of the optical fiber assembly adjacent to the optical filter is an inclined surface.
Optionally, defining the inclination angle of the inclined plane of the optical fiber assembly to the vertical direction as γ, the relationship is satisfied: gamma is more than or equal to 6 degrees and less than or equal to 12 degrees.
Optionally, the single-fiber bidirectional optical device further includes a light detector, the light detector is disposed on a side of the base opposite to the mounting groove, the light detector is at least partially disposed in the accommodating cavity, the optical filter is obliquely disposed between the laser and the optical fiber assembly, and light received by the optical fiber assembly is reflected to the light detector through the optical filter.
Optionally, the light emitted by the laser and the light received by the light detector are in the same wave band, and the optical filter is a half-wave plate.
Optionally, defining the tilt angle between the filter and the horizontal as β, the relationship is satisfied: beta is more than or equal to 41 degrees and less than or equal to 51 degrees.
According to the technical scheme, the laser and the optical fiber assembly are respectively arranged on the two opposite sides of the base, the laser and the optical fiber assembly are at least partially arranged in the accommodating cavity, and the optical filter is arranged in the accommodating cavity and between the laser and the optical fiber assembly, so that light rays emitted by the laser can directly irradiate the optical fiber assembly after passing through the optical filter, and when the light passes through the optical filter, part of the light rays can be reflected by the optical filter to enter the accommodating cavity. The wave absorbing element is arranged in the mounting groove, so that when light emitted by the laser is reflected at the optical filter, the reflected light can be absorbed by the wave absorbing element, interference caused by coupling of the reflected light to light emission and coupling of light receiving in the base is effectively avoided, normal transmission of light signals is ensured, and meanwhile, the wave absorbing element is arranged in the mounting groove and can be fixed with the base, so that the mounting is stable and firm.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a single-fiber bi-directional optical device according to an embodiment of the present invention, wherein the direction of the dashed arrow is the transmission direction of light;
FIG. 2 is a schematic diagram of another embodiment of a single fiber bi-directional optical device according to the present invention;
fig. 3 is a partial enlarged view at a in fig. 2.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Base seat | 11 | Accommodating chamber |
| 12 | Mounting groove | 20 | Laser device |
| 30 | Optical fiber assembly | 31 | Protective sleeve |
| 32 | Optical fiber ferrule | 40 | Optical filter |
| 41 | Wave-absorbing material layer | 50 | Wave absorbing element |
| 121 | Blocking part | 60 | Photodetector |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout the text is to include three side-by-side schemes, taking "a and/or B as examples", including a scheme, or B scheme, or a scheme that both a and B satisfy. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a single-fiber bidirectional optical device.
Referring to fig. 1 to 3, in an embodiment of the present invention, the single fiber bidirectional optical device includes:
a base 10, wherein a containing cavity 11 and a mounting groove 12 communicated with the containing cavity 11 are arranged in the base 10;
a laser 20 disposed on one side of the base 10, wherein the laser 20 is at least partially disposed in the accommodating cavity 11;
The optical fiber assembly 30 is arranged on the other side of the base 10, and the optical fiber assembly 30 is at least partially arranged in the accommodating cavity 11;
A light filter 40, wherein the light filter 40 is disposed in the accommodating cavity 11 and between the laser 20 and the optical fiber assembly 30, and the light emitted by the laser 20 is transmitted to the optical fiber assembly 30 through the light filter 40; and
The wave absorbing element 50 is disposed in the mounting groove 12, and absorbs the light reflected in the base 10 through the optical filter 40.
The base 10 may be made of a metal material, and is formed into a metal seat body, so as to facilitate processing and molding. The laser 20, as a light emitter, may convert an electrical signal into an optical signal to provide a light source. In the present application, the optical fiber assembly 30 includes a protective sleeve 31, an optical fiber ferrule 32 and an optical fiber (not shown), wherein one end of the optical fiber ferrule 32 is inserted into the protective sleeve 31, and the other end is located outside the protective sleeve 31, and the optical fiber is inserted into the protective sleeve 31 and connected with the optical fiber ferrule 32, specifically, the protective sleeve 31 can be made of a metal material, the cost is low, the optical performance is good, and the optical fiber ferrule 32 can be a pigtail ferrule, which is beneficial to the transmission of optical signals.
In this embodiment, the wave absorbing element 50 may be a wave absorbing plate, or a light absorbing plate, capable of absorbing an optical signal, and when the laser light emitted from the laser 20 reaches the optical filter 40 to reflect, the laser light is absorbed by the wave absorbing element 50.
In an embodiment of the present application, the single-fiber bidirectional optical device further includes a light detector 60, the light detector 60 is at least partially disposed in the accommodating cavity 11, the optical filter 40 is obliquely disposed between the laser 20 and the optical fiber assembly 30, and the light received by the optical fiber assembly 30 is reflected to the light detector 60 through the optical filter 40. The optical detector 60 is used as an optical receiver, and can receive the light rays transmitted by the optical fiber assembly 30 to the optical filter 40, so as to convert the optical signals into electrical signals, therefore, the single-fiber bidirectional optical device transmits laser light rays by the laser 20, transmits the laser light rays to the optical fiber assembly 30, then reflects the laser light rays by the optical filter 40, and finally receives the laser light rays by the optical detector 60, thereby realizing the transmission of the transmitted signals and the received signals in a single optical fiber.
In one embodiment, the light emitted by the laser 20 and the light received by the photodetector 60 are in the same wavelength band, and the filter 40 is a half-wave plate. Half-wave plates are typically made of mica plates, which are birefringent crystals of a certain thickness, the phase difference between ordinary and extraordinary light being equal to pi or an odd multiple thereof when normally incident light is transmitted. Since the light emitted by the laser 20 and the light received by the light detector 60 are in the same wave band, the optical filter 40 is configured as a half wave plate, at this time, half of the light emitted by the laser 20 is directly injected into the optical fiber assembly 30 after passing through the optical filter 40, and the other half of the light is reflected by the optical filter 40 and absorbed by the wave absorbing element 50, so as to avoid the optical crosstalk caused by the reflected light.
Therefore, in the technical solution of the present invention, the laser 20 and the optical fiber assembly 30 are respectively disposed on two opposite sides of the base 10, and the laser 20 and the optical fiber assembly 30 are both at least partially disposed in the accommodating cavity 11, and the optical filter 40 is disposed in the accommodating cavity 11 and between the laser 20 and the optical fiber assembly 30, so that the light emitted by the laser 20 can be directly incident to the optical fiber assembly 30 after being reflected by the optical filter 40. Through locating the wave absorbing element 50 in the mounting groove 12, therefore when the light that laser 20 launched takes place the reflection in light filter 40 department, the light that reflects can be absorbed by wave absorbing element 50, has effectually avoided the light that reflects to launch in base 10 coupling and light-receiving's coupling to cause the interference, guarantees the normal transmission of light signal, and wave absorbing element 50 locates in the mounting groove 12 simultaneously, and can be fixed mutually with base 10, and the installation is stable, firm.
In an embodiment of the present application, the wave absorbing member 50 is located below the optical filter 40 and is disposed in the mounting groove 12 in an inclined manner. In this embodiment, the mounting groove 12 is located at the bottom of the accommodating cavity 11, the optical filter 40 is located above the notch of the mounting groove 12, when the light reaches the optical filter 40, part of the light is reflected into the mounting groove 12 below, and the wave absorbing element 50 is obliquely disposed in the mounting groove 12, so that the risk of interference caused by the reflected light being reflected again through the notch of the mounting groove 12 after the wave absorbing element 50 absorbs the reflected light can be avoided, and the interference risk of the reflected light is further reduced.
Referring to fig. 3, in the present application, defining the inclination angle between the absorbing element 50 and the horizontal line as α, the relationship is: alpha is more than or equal to 22 degrees and less than or equal to 30 degrees. As can be appreciated, setting the inclination angle between the wave-absorbing element 50 and the horizontal line within this range can ensure that, on the one hand, the wave-absorbing element 50 does not tend to be flat due to the inclination angle being too small, so that reflected light reaching the wave-absorbing element 50 can be prevented from being reflected again by the notch of the mounting groove 12 to form secondary reflection; on the other hand, the inclination angle between the wave absorbing element 50 and the horizontal line is not excessively large, so that the wave absorbing element 50 cannot sufficiently contact the light reflected from the optical filter 40 in all directions, and a sufficient absorption area of the wave absorbing element 50 is ensured. Therefore, in this embodiment, the inclination angle between the wave absorbing element 50 and the horizontal line is set in the range of 22 ° to 30 °, so that the absorption area of the wave absorbing element 50 is considered, and the occurrence of secondary reflection interference is avoided.
It will be appreciated that in practical applications, the angle of inclination between the wave absorbing member 50 and the horizontal may be 22 °, 24 °, 26 °, 28 ° or 30 °.
Referring to fig. 1, in an embodiment of the application, a notch of the mounting groove 12 is disposed corresponding to the optical filter 40, and a blocking portion 121 is disposed at the notch of the mounting groove 12 to block light reflected outside the mounting groove 12 through the wave absorbing element 50. Specifically, the blocking portion 121 may be a block covering a part of the notch of the mounting groove 12, so in practical application, the light reflected by the optical filter 40 is injected into the mounting groove 12 through the part of the notch of the mounting groove 12 that is not covered, and then most of the light is absorbed by the wave absorbing element 50, and the other part of the light is blocked and covered by the blocking portion 121 after being reflected by the wave absorbing element 50, so that the light reflected by the wave absorbing element 50 is effectively prevented from being injected into the accommodating cavity 11 again through the notch of the mounting groove 12 to form interference, and the crosstalk of the reflected light caused by optical coupling is further reduced.
Referring to fig. 2, in order to prevent crosstalk caused by light reflected by the wave-absorbing element 50 to the optical fiber assembly 30, a wave-absorbing material layer 41 is further disposed on a surface of the optical filter 40 facing the optical fiber assembly 30, and the wave-absorbing material layer 41 is disposed at an end portion of the optical filter 40 adjacent to the wave-absorbing element 50. When the wave absorbing element 50 reflects, the reflected laser reaches the end of the optical filter 40 corresponding to the wave absorbing element 50 and is absorbed by the wave absorbing material layer 41, so that the cross talk caused by the laser reflected by the wave absorbing element 50 entering the optical fiber assembly 30 is effectively avoided. In one embodiment, the wave absorbing material layer 41 is an epoxy layer. The structural density of the epoxy resin is high, so that the laser reflected by the wave absorbing element 50 can be prevented from entering the optical fiber assembly 30 through the optical filter 40, the source of the epoxy resin is easy to obtain, the cost is low, and the production cost can be reduced.
Since the laser 20 emits the laser light to the fiber optic assembly 30, the end face of the fiber optic assembly 30 will re-reflect a portion of the laser light back to the laser 20, thereby interfering with the emission of light from the laser 20. Therefore, in the present application, the end surface of the optical fiber assembly 30 adjacent to the optical filter 40 is an inclined surface, so that when the end surface of the optical fiber assembly 30 reflects light, the reflected light cannot directly return to the laser 20, but is reflected into the accommodating cavity 11 of the base 10 through the inclined end surface of the optical fiber assembly 30, thereby effectively avoiding crosstalk caused by the direct return of the reflected light of the optical fiber assembly 30 to the laser 20.
Referring to fig. 3, in an embodiment of the present application, defining the inclination angle γ between the inclined plane of the optical fiber assembly 30 and the vertical direction, the relationship is: gamma is more than or equal to 6 degrees and less than or equal to 12 degrees. The inclination angle gamma of the inclined surface and the vertical direction is not too large, and is not too small; if the amount of the light emitted from the laser 20 is too large, the inclined surface is too inclined, so that most of the laser light is easily refracted at the inclined surface and lost, resulting in low efficiency of optical signal transmission; if too small, the inclined surface tends to be flat, and thus the laser light transmitted from the laser 20 is reflected back to the laser 20 at the inclined surface to form optical crosstalk. Therefore, in the present embodiment, the inclination angle γ of the inclined surface to the vertical direction is set to a range of not less than 6 ° and not more than 12 °.
It will be appreciated that in practical applications, the inclination angle γ of the inclined surface to the vertical may be 6 °, 8 °, 10 °, 11 ° or 12 °.
In an embodiment of the single-fiber bi-directional optical device of the present application, defining the tilt angle β between the optical filter 40 and the horizontal line, the relationship is: beta is more than or equal to 41 degrees and less than or equal to 51 degrees. In this embodiment, the photodetector 60 is located above the optical filter 40, preferably, the inclination angle β between the optical filter 40 and the horizontal line is 47 °, so that half of the laser light emitted by the laser 20 directly enters the optical fiber assembly 30, and then the optical fiber assembly 30 receives the optical signal and reflects the optical signal to the photodetector 60 through the optical filter 40, and the other half of the laser light is reflected at the optical filter 40 and absorbed by the wave absorbing element 50, so that the signal emission and the signal receiving are completed in a single optical fiber, and meanwhile, the reflected laser light will not cause crosstalk to the coupling of the light emission and the light receiving after being absorbed, so as to ensure the effective transmission of the optical signal.
Of course, in other embodiments, the inclination angle β between the optical filter 40 and the horizontal line may be 41 °, 43 °, 45 °,47 °, 49 ° or 51 °, so that the reflected light can be absorbed better, and the normal emission and reception of the optical signal can be ensured.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (5)
1. A single fiber bi-directional optical device, comprising:
the base is internally provided with a containing cavity and a mounting groove communicated with the containing cavity;
the laser is arranged on one side of the base and at least partially arranged in the accommodating cavity;
the optical fiber assembly is arranged on the other side of the base, and at least part of the optical fiber assembly is arranged in the accommodating cavity;
The optical filter is arranged in the accommodating cavity and positioned between the laser and the optical fiber assembly, and light rays emitted by the laser are transmitted to the optical fiber assembly through the optical filter;
The side of the optical filter, which faces the optical fiber assembly, is also provided with a wave-absorbing material layer, the wave-absorbing material layer is positioned at the end part of the optical filter, which is adjacent to the wave-absorbing element, and the wave-absorbing material layer is an epoxy resin layer;
The wave absorbing element is arranged in the mounting groove and used for absorbing light rays which pass through the optical filter and are reflected in the base; the wave absorbing element is positioned below the optical filter and is obliquely arranged in the mounting groove; the notch of the mounting groove is arranged corresponding to the optical filter, and a blocking part is arranged at the notch of the mounting groove and used for blocking light rays from being reflected outside the mounting groove through the wave absorbing element;
The optical detector is arranged on one side of the base, which is opposite to the mounting groove, at least part of the optical detector is arranged in the accommodating cavity, the optical filter is obliquely arranged between the laser and the optical fiber assembly, light received by the optical fiber assembly is reflected to the optical detector through the optical filter, light emitted by the laser and light received by the optical detector are in the same wave band, and the optical filter is a half-wave plate.
2. The single fiber bi-directional optical device of claim 1, wherein defining the tilt angle α between the absorbing element and the horizontal satisfies the relationship: alpha is more than or equal to 22 degrees and less than or equal to 30 degrees.
3. The single fiber bi-directional optical device of claim 1 wherein an end surface of said fiber optic assembly adjacent said optical filter is an angled surface.
4. The single fiber bi-directional optical device of claim 1, wherein defining the tilt angle of the tilt surface of the fiber optic assembly to the vertical as γ satisfies the relationship: gamma is more than or equal to 6 degrees and less than or equal to 12 degrees.
5. The single fiber bi-directional optical device of claim 1, wherein defining the tilt angle between the filter and horizontal as β satisfies the relationship: beta is more than or equal to 41 degrees and less than or equal to 51 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679610.1A CN110308528B (en) | 2019-07-25 | 2019-07-25 | Single-fiber bidirectional optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679610.1A CN110308528B (en) | 2019-07-25 | 2019-07-25 | Single-fiber bidirectional optical device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110308528A CN110308528A (en) | 2019-10-08 |
| CN110308528B true CN110308528B (en) | 2024-06-18 |
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| CN201910679610.1A Active CN110308528B (en) | 2019-07-25 | 2019-07-25 | Single-fiber bidirectional optical device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113267851A (en) | 2019-12-23 | 2021-08-17 | 讯芸电子科技(中山)有限公司 | Optical communication module |
| CN111650701A (en) * | 2020-06-29 | 2020-09-11 | 成都新易盛通信技术股份有限公司 | Structure for improving return loss and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2766254Y (en) * | 2005-01-14 | 2006-03-22 | 武汉光迅科技有限责任公司 | Novel single-fiber bidirectional device |
| CN106569304A (en) * | 2016-10-25 | 2017-04-19 | 青岛海信宽带多媒体技术有限公司 | Light receiving and transmitting device and optical module |
| CN210119610U (en) * | 2019-07-25 | 2020-02-28 | 深圳市亚派光电器件有限公司 | Single-fiber bidirectional optical device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2600427B1 (en) * | 1986-06-20 | 1989-08-25 | Deutsch Co | END CONNECTION DEVICE FOR OPTICAL FIBER WITH OPTOELECTRONIC COMPONENTS AND OPTICAL COUPLING |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2766254Y (en) * | 2005-01-14 | 2006-03-22 | 武汉光迅科技有限责任公司 | Novel single-fiber bidirectional device |
| CN106569304A (en) * | 2016-10-25 | 2017-04-19 | 青岛海信宽带多媒体技术有限公司 | Light receiving and transmitting device and optical module |
| CN210119610U (en) * | 2019-07-25 | 2020-02-28 | 深圳市亚派光电器件有限公司 | Single-fiber bidirectional optical device |
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|---|---|
| CN110308528A (en) | 2019-10-08 |
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