CN113568115A - Low-insertion-loss high-return-loss double-fiber detector assembly - Google Patents
Low-insertion-loss high-return-loss double-fiber detector assembly Download PDFInfo
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- CN113568115A CN113568115A CN202110801755.1A CN202110801755A CN113568115A CN 113568115 A CN113568115 A CN 113568115A CN 202110801755 A CN202110801755 A CN 202110801755A CN 113568115 A CN113568115 A CN 113568115A
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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
- G02B6/42—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
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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
- G02B6/42—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
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- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to a low-insertion-loss and high-return-loss double-fiber detector assembly in the technical field of optical communication, which comprises an assembly body, wherein a detector chip, a self-focusing lens, an optical filter, a Glens capable of filtering and a glass tube are sequentially arranged in the assembly body along the axial direction, one end of the Glens, which is far away from the optical filter, is provided with an inclined end face, an included angle between one end of the glass tube, which is close to the Glens, and the inclined end face of the Glens is 8 degrees +/-0.5 degrees, the detector chip and the inclined end face of the Glens are oppositely inclined, an included angle between the detector chip and the end face of the optical filter, which is close to one end of the self-focusing lens, is 6 degrees +/-0.5 degrees, a double-fiber capillary tube is coaxially arranged in the glass tube, and a Comm-channel optical fiber and a refiect-channel optical fiber are spliced in the double-fiber capillary tube. The invention can realize the receiving of the optical signal of 1550nm wave band, and does not change the transmission mode and the equipment configuration of the optical signal of the prior ONU equipment, thereby reducing the cost of updating and upgrading the product.
Description
Technical Field
The invention belongs to the technical field of optical communication, and particularly relates to a low-insertion-loss and high-return-loss dual-fiber detector assembly.
Background
With the popularization of optical fiber to the home, people have greater requirements on the speed, capacity and channel of an optical network, and on the basis of the original internet communication, a cable television broadband and a telecommunication network are added, and three networks need to be interconnected and communicated, but because the original OLT (optical line terminal) in the prior art already has optical signals of two wave bands of 1310nm/1490nm, an analog channel represented by the optical signal of the wave band of 1550nm is added. And the existing ONU device (optical network unit) does not have the analog channel for reception, which increases the difficulty for the subsequent triple play update.
Therefore, it is highly desirable to develop a dual-fiber type detector module with low insertion loss and high return loss to receive the optical signal in 1550nm band, and to make the compatibility better without changing the transmission method of the optical signal in 1310nm/1490nm band in the existing ONU device or changing the installation configuration of the original device, so as to reduce the cost of product replacement.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a low two fine type detector assembly who decreases high return loss of inserting, includes the subassembly body, this internal detector chip, from spotlight lens, light filter, the Glens and the glass pipe that can filter of having set gradually along the axial of subassembly, locate between detector chip and light filter from spotlight lens, the light filter is kept away from one side bonding of spotlight lens in the one end of Glens, and the one end that light filter was kept away from to Glens is equipped with the slope terminal surface, the one end that the light filter was kept away from to the glass pipe is located to Glens, and the contained angle that the glass pipe is close to between the terminal surface of Glens one end and the slope terminal surface of Glens is 8 +/-0.5, detector chip and Glens's slope terminal surface reverse slope setting, and the contained angle that the detector chip is close to between the terminal surface of Glens one end and the terminal surface that the light filter is close to self spotlight lens one end is 6 +/-0.5, the intraductal coaxial double-fiber capillary that is provided with of glass, a Com channel optical fiber and a reflex channel optical fiber are spliced in the double-fiber capillary tube, and one ends, far away from the double-fiber capillary tube, of the Com channel optical fiber and the reflex channel optical fiber are respectively connected with an SC-APC optical fiber quick connector and an SC-PC optical fiber quick connector.
Preferably, the Com channel fiber is a 0.9mm white single-mode fiber, and the Reflect channel fiber is a 0.9mm red single-mode fiber.
Preferably, the included angle between the end face of the glass tube close to one end of the optical filter and the inclined end face of the Glens is 8 degrees, so that a better low insertion loss effect is realized.
Preferably, an included angle between an end face of the detector chip close to one end of the self-focusing lens and an end face of the optical filter close to one end of the self-focusing lens is 6 degrees, so that an optical signal of a 1550nm waveband is received, and a return loss value of the optical signal of the 1550nm waveband is increased.
Preferably, one end of the SC-APC optical fiber fast connector, which is far away from the Com channel optical fiber, is connected to a downstream PON port optical fiber on the OLT device, the OLT device can send an optical signal in a 1490nm/1550nm band and receive an optical signal in a 1310nm band, one end of the SC-PC optical fiber fast connector, which is far away from a reflector channel optical fiber, is connected to a GE function component and a CATV port optical fiber in the ONU device, the ONU device can send an optical signal in a 1310nm band and receive an optical signal in a 1490nm band, the detector chip is responsible for receiving an optical signal in a 1550nm band and realizes a photoelectric conversion function, and the self-condensing lens cooperates with the detector chip to perform optical coupling with an optical signal in a 1550nm band, so as to achieve smooth optical path and prevent the optical signal in the 1550nm band from returning to the Com channel optical fiber.
The invention also comprises other devices or components which can enable the low-insertion-loss high-return-loss dual-fiber detector component to be normally used, and the devices or components are conventional technical means in the field; in addition, the devices and components not limited in the present invention all adopt the conventional technical means in the field, such as the OLT device and the ONU device.
The working principle of the invention is that based on the principle that the emergent angle is larger than the incident angle, through the light path simulation design, the included angle between the end surface of the glass tube close to the Glens end and the inclined end surface of the Glens is 8 degrees +/-0.5 degrees, and the included angle between the end surface of the detector chip close to the self-focusing lens end and the end surface of the optical filter close to the self-focusing lens end is 6 degrees +/-0.5 degrees. The optical fiber is used for reflecting the 1490nm band optical signal transmitted by the Com channel optical fiber into the Reflect channel optical fiber and reflecting the 1310nm band optical signal transmitted by the Reflect channel optical fiber into the Com channel optical fiber, so that the Com and Reflect optical paths are independent; the detector chip is responsible for the receipt of the optical signal of 1550nm wave band, and realize the photoelectric conversion function, carry out the optical coupling with the optical signal of 1550nm wave band from the cooperation of spotlight optical lens detector chip, realize the unblocked of light path, and make the optical signal of 1550nm wave band can't return to in the Com channel fiber, the return loss value of the optical signal of 1550nm wave band has been increased, thereby avoid producing the interference to the optical signal of other wave bands, realized the regular forwarding in the optic fibre of the optical signal of the three wave bands of 1310nm/1490nm/1550 nm.
Compared with the prior art, the invention has the following beneficial effects:
the invention can realize the receiving of the optical signal of 1550nm waveband, and does not change the transmission mode of the 1310nm/1490nm waveband optical signal in the prior ONU equipment, and does not change the configuration of the prior equipment, thereby ensuring better product compatibility and reducing the cost of product updating.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of the overall structure of the present invention in the embodiment.
Fig. 2 is a schematic view showing the positional relationship of the respective components in the assembly body of the present invention in the embodiment.
Detailed Description
The present invention will be described more clearly with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention. All other embodiments, which can be obtained by those skilled in the art without any inventive step based on the embodiments of the present invention, should be included in the scope of the present invention.
Examples
As shown in fig. 1-2, the invention provides a low-insertion-loss and high-return-loss dual-fiber detector assembly, which comprises an assembly body 1, wherein a detector chip 2, a self-condensing lens 3, an optical filter 4, a Glens5 capable of filtering and a glass tube 6 are sequentially arranged in the assembly body 1 along an axial direction, the self-condensing lens 3 is arranged between the detector chip 2 and the optical filter 4, one side of the optical filter 4 far away from the self-condensing lens 3 is bonded to one end of the Glens5, one end of the Glens5 far away from the optical filter 4 is provided with an inclined end face, the glass tube 6 is arranged at one end of the Glens5 far away from the optical filter 4, an included angle between an end face of the glass tube 6 close to one end of the Glens5 and the inclined end face of the Glens5 is 8 °, the inclined end faces of the detector chip 2 and the Glens5 are oppositely inclined, an included angle between an end face of the detector chip 2 close to one end of the self-condensing lens 3 and an end face of the optical filter 4 close to one end of the self-condensing lens 3 is 6 °, the coaxial double-fiber capillary 7 that is provided with in glass pipe 6, it has Com channel optic fibre 8 and Reflect channel optic fibre 9 to peg graft in the double-fiber capillary 7, the one end that Com channel optic fibre 8 and Reflect channel optic fibre 9 keep away from double-fiber capillary 7 is connected with SC-APC optic fibre quick connector 10 and SC-PC optic fibre quick connector 11 respectively.
The Com channel fiber 8 is a 0.9mm white single-mode fiber, and the reflex channel fiber 9 is a 0.9mm red single-mode fiber. One end of the SC-APC optical fiber fast connector 10, which is far from the Com channel optical fiber 8, is connected to a downstream PON port optical fiber on the OLT device 12, the OLT device 12 can send an optical signal of 1490nm/1550nm band and receive an optical signal of 1310nm band, one end of the SC-PC optical fiber fast connector 11, which is far from the reflection channel optical fiber 9, is connected to a GE function component and a CATV port optical fiber in the ONU device 13, the ONU device 13 can send an optical signal of 1310nm band and receive an optical signal of 1490nm band, the detector chip 2 is responsible for receiving an optical signal of 1550nm band and realizes a photoelectric conversion function, the self-condensing lens 3 cooperates with the detector chip 2 to optically couple with an optical signal of 1550nm band, so as to achieve smooth optical path and prevent the optical signal of 1550nm band from returning to the Com channel optical fiber 8.
The working principle of the invention is that based on the principle that the emergent angle is larger than the incident angle, through the light path simulation design, the included angle between the end surface of the glass tube 6 close to the Glens5 end and the inclined end surface of the Glens5 is 8 degrees, and the included angle between the end surface of the detector chip 2 close to the self-condensing lens 3 end and the end surface of the optical filter 4 close to the self-condensing lens 3 end is 6 degrees. The optical fiber is used for reflecting the 1490nm band optical signal transmitted by the Com channel fiber 8 into the Reflect channel fiber 9 and reflecting the 1310nm band optical signal transmitted by the Reflect channel fiber 9 into the Com channel fiber 8, so that the Com and Reflect optical paths are independent; the detector chip 2 is responsible for the receiving of the optical signal of 1550nm wave band, and realize the photoelectric conversion function, carry out the optical coupling with the optical signal of 1550nm wave band from the cooperation of light gathering lens 3 detector chip 2, realize the unblocked of light path, and make the optical signal of 1550nm wave band can't return to in the Com channel fiber 8, the return loss value of the optical signal of 1550nm wave band has been increased, thereby avoid producing the interference to the optical signal of other wave bands, realized the regular forwarding in the optic fibre of the optical signal of the three wave bands of 1310nm 1490nm 1550 nm.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (5)
1. The utility model provides a two fine type detector subassemblies of high return loss of low insertion loss which characterized in that: the optical fiber self-gathering module comprises a module body, wherein a detector chip, a self-gathering lens, an optical filter, a Glans capable of filtering and a glass tube are sequentially arranged in the module body along the axial direction, the self-gathering lens is arranged between the detector chip and the optical filter, one side, far away from the self-gathering lens, of the optical filter is bonded at one end of the Glans, one end, far away from the optical filter, of the Glans is provided with an inclined end face, the glass tube is arranged at one end, far away from the optical filter, of the Glens, an included angle between an end face, close to one end of the Glens, of the glass tube and the inclined end face of the Glens is 8 degrees +/-0.5 degrees, the detector chip and the inclined end face of the Glens are arranged in a reverse inclined manner, an included angle between an end face, close to one end of the self-gathering lens, of the detector chip and an end face, close to one end of the optical filter, close to the self-gathering lens, is 6 +/-0.5 degrees, a double-fiber capillary tube is coaxially arranged in the glass tube, and a Com channel optical fiber and a Reflect channel optical fiber are spliced in the double-channel optical fiber, and one ends of the Com channel optical fiber and the reflex channel optical fiber, which are far away from the double-fiber capillary, are respectively connected with an SC-APC optical fiber quick connector and an SC-PC optical fiber quick connector.
2. The low insertion loss, high return loss dual fiber detector assembly of claim 1, wherein: the Com channel optical fiber is a 0.9mm white single-mode optical fiber, and the reflex channel optical fiber is a 0.9mm red single-mode optical fiber.
3. The low insertion loss, high return loss dual fiber detector assembly of claim 1, wherein: and the included angle between the end surface of one end of the glass tube close to the optical filter and the inclined end surface of the Glens is 8 degrees.
4. The low insertion loss, high return loss dual fiber detector assembly of claim 1, wherein: the included angle between the end face of the detector chip close to one end of the self-focusing lens and the end face of the optical filter close to one end of the self-focusing lens is 6 degrees.
5. A low insertion loss high return loss dual fiber detector assembly according to any one of claims 1 to 4, wherein: one end of the SC-APC optical fiber quick connector, which is far away from a Com channel optical fiber, is connected with a downlink PON port optical fiber on OLT equipment, the OLT equipment can send an optical signal of 1490nm/1550nm waveband and receive an optical signal of 1310nm waveband, one end of the SC-PC optical fiber quick connector, which is far away from a reflection channel optical fiber, is connected with a GE functional component and a CATV port optical fiber in ONU equipment, the ONU equipment can send an optical signal of 1310nm waveband and receive an optical signal of 1490nm waveband, the detector chip is responsible for receiving the optical signal of 1550nm waveband and realizes a photoelectric conversion function, the self-condensing lens is matched with the detector chip to perform optical coupling with the optical signal of 1550nm waveband, so that the smoothness of an optical path is realized, and the optical signal of 1550nm waveband cannot return to the Com channel optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110801755.1A CN113568115A (en) | 2021-07-15 | 2021-07-15 | Low-insertion-loss high-return-loss double-fiber detector assembly |
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| CN202110801755.1A CN113568115A (en) | 2021-07-15 | 2021-07-15 | Low-insertion-loss high-return-loss double-fiber detector assembly |
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| CN101021602A (en) * | 2006-02-16 | 2007-08-22 | 日本板硝子株式会社 | Optical tap module |
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| CN204790086U (en) * | 2015-06-30 | 2015-11-18 | 昂纳信息技术（深圳）有限公司 | Directionality light detector |
| CN204855855U (en) * | 2015-07-28 | 2015-12-09 | 广州奥鑫通讯设备有限公司 | Light wavelength division multiplexer |
| CN207675980U (en) * | 2018-01-10 | 2018-07-31 | 上海裕荣光电科技股份有限公司 | A kind of WDM devices and PD-WDM components |
| CN208860997U (en) * | 2018-06-15 | 2019-05-14 | 广州奥鑫通讯设备有限公司 | A kind of light wavelength division multiplexing of high return loss |
-
2021
- 2021-07-15 CN CN202110801755.1A patent/CN113568115A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101021602A (en) * | 2006-02-16 | 2007-08-22 | 日本板硝子株式会社 | Optical tap module |
| JP2007219514A (en) * | 2006-02-16 | 2007-08-30 | Nippon Sheet Glass Co Ltd | Optical tap module |
| CN202563130U (en) * | 2012-04-28 | 2012-11-28 | 上海中科股份有限公司 | One-way Tap-PD detector |
| CN204790086U (en) * | 2015-06-30 | 2015-11-18 | 昂纳信息技术（深圳）有限公司 | Directionality light detector |
| CN204855855U (en) * | 2015-07-28 | 2015-12-09 | 广州奥鑫通讯设备有限公司 | Light wavelength division multiplexer |
| CN207675980U (en) * | 2018-01-10 | 2018-07-31 | 上海裕荣光电科技股份有限公司 | A kind of WDM devices and PD-WDM components |
| CN208860997U (en) * | 2018-06-15 | 2019-05-14 | 广州奥鑫通讯设备有限公司 | A kind of light wavelength division multiplexing of high return loss |
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Application publication date: 20211029 |