CN2876807Y - Single fiber bidirectional three port assembly - Google Patents
Single fiber bidirectional three port assembly Download PDFInfo
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- CN2876807Y CN2876807Y CNU2006200134609U CN200620013460U CN2876807Y CN 2876807 Y CN2876807 Y CN 2876807Y CN U2006200134609 U CNU2006200134609 U CN U2006200134609U CN 200620013460 U CN200620013460 U CN 200620013460U CN 2876807 Y CN2876807 Y CN 2876807Y
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- single fiber
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Abstract
The utility model provides a single-fiber two-way three-port assembly composed of a base, the inside of which is equipped with a single optical fiber collimator, a filter plate, a beam splitting plate, a lens, a laser, a first light receiver and a second light receiver as well as a light absorption device. The laser emits a light signal with a wavelength of Lambda 1, and after the signal is split by the beam splitting plate, the reflected light is absorbed by the light absorption device and the transmitted light is outputted by the single optical fiber collimator; the light signals with wavelengths of Lambda 1a and Lambda 2 which is in the opposing direction with the transmitted light beam with a wavelength of Lambda 1 are inputted to the filter plate for processing by the single optical fiber collimator, and the light signal with a wavelength of Lambda 2 is received by the first light receiver after being totally reflected; after the light signal with a wavelength of Lambda 1a is transmitted to the beam splitting plate and split in proportion, the reflected light is received by the second light receiver, and the transmitted light is absorbed by the light absorption device; the wavelengths of both the Lambda 1a and the Lambda 1 are between 1260-1360 nm. This forms the double-wavelength single-fiber two-way three-port assembly that both the upstream signal and the downstream signal can use the FP laser and meets the art requirement of low cost point-to-point transmission.
Description
Technical field
The utility model relates to a kind of single fiber bi-directional optical assembly product that Fiber to the home (FTTH), relates in particular to a kind of single fiber bi-directional three port assemblies.
Background technology
Along with the development of Access Network, the notion of FTTH deepens constantly, and technical scheme is more and more abundanter, and moves towards practicability gradually.FTTH mainly is to adopt optical fiber to realize a kind of technical approach that the user is connected with operator as physical media.Consider that from technology and cost angle which kind of scheme FTTH adopts relevant with user's geographic distribution, FTTH can adopt two class network structures usually.The one, passive optical network (PON) structure, the 2nd, point-to-point (P2P) structure.EPON is a kind of Ethernet tranmission techniques based on PON, and it adopts on an optical fiber and realizes the point-to-multipoint two-way communication with wavelength-division multiplex (WDM) technology, has characteristics such as form is transparent, low price, has complied with the development trend of next generation networkization.P2P is the Ethernet tranmission techniques that a kind of point-to-point optical fiber connects.It also adopts the wavelength-division technology to realize two-way communication, with EPON comparatively speaking, it possess skills realize simple, price is lower, can realize that little customer volume inserts the characteristics of being easy to.Single fiber bi-directional three port assemblies are core devices of FTTH technology.Existing single fiber bi-directional assembly adopts 1310/1490/1550nm three-wavelength single fiber bi-directional transmission technology, be about to the 1550nm window and be used for descending simulation CATV transmission, the uplink that refrigeration 1310nm semiconductor laser diode light source is used for numerous terminal users will do not had, descending digital transmission adopts the 1490nmDFB laser instrument, three direction signals is transmitted being multiplexed in the optical fiber by the mode of similar CWDM.Single fiber bi-directional three port assemblies of this three-wavelength are high power, high-speed burst transmitting-receiving owing to what adopt, the light of descending 1490nm wavelength can only be used the higher Distributed Feedback Laser of price, such three-wavelength single fiber bi-directional three port assemblies are fit to be applied in the Ethernet tranmission techniques of PON, and for cost of access require can not be too high point-to-point access technology, single fiber bi-directional three port assemblies of this kind unification of three nets just seem that cost is higher, its widespread use of incompatibility.
Summary of the invention
For overcoming above shortcoming, the utility model provides a kind of two-way three port assemblies of low-cost single fiber that point-to-point access technology requires that adapt to.
For realizing the object of the invention, the technical solution adopted in the utility model: a kind of single fiber bi-directional three port assemblies, comprise a base, comprise in this base: a single fiber collimating apparatus, one becomes the filter plates at 45 degree or 135 degree angles with optical axis, one becomes the light splitting pieces at 45 degree or 135 degree angles with optical axis, one lens, one laser instrument, first optical receiver and second optical receiver, an and extinction device, this extinction device is positioned between described light splitting piece and lens, the described lens of optical signals that described laser instrument sends a wavelength X 1 are transformed into parallel beam, this parallel beam is incident to light splitting piece and produces two light beams: λ, 1 transmitted light beam and λ 1 folded light beam according to a certain percentage, described λ 1 folded light beam is absorbed by described extinction device, λ 1 transmitted light beam is after the whole transmissions of described filter plate, by described single fiber collimating apparatus coupling output; The wavelength opposite with this λ 1 transmitted light beam direction is to be incident to described filter plate after the light signal of λ 1a and λ 2 is then imported by described single fiber collimating apparatus, light signal λ 2 is received by first optical receiver after described filter plate total reflection, light signal λ 1a is incident to described light splitting piece after the whole transmissions of described filter plate, and be divided into two light beams: λ 1a transmitted light beam and λ 1a folded light beam through this light splitting piece, λ 1a folded light beam is received by second optical receiver, and λ 1a transmitted light beam is absorbed by base intracavity.
Described laser instrument is the FP laser instrument.
Described lens are globe lens.
Described extinction device is the extinction groove that a base inner wall is provided with.
Described extinction device comprises: be positioned at the extinction lid that a through hole and this through hole of sealing are set on the base.
The lens of described single fiber collimating apparatus are curved end and the anti-reflection film that plates 1260nm-1600nm.
The wavelength coverage of described λ 1 and λ 1a is 1260-1360nm, and the wavelength coverage of λ 2 is 1550-1560nm.
The wavelength of described λ 1 and λ 1a is 1310nm, and the wavelength coverage of λ 2 is 1550nm.
Because dual wavelength single fiber bi-directional three port assemblies of said structure, its terminal user's uplink and descending digital transmission all can adopt the relatively low FP laser instrument of cost, and on base, offer the extinction device, that can avoid that the reflection of base inner wall causes harasses, like this, just can satisfy of the requirement of point-to-point low-power transmission technology to two-way three port assemblies of low-cost single fiber.
Description of drawings
Fig. 1 represents a kind of embodiment of single fiber bi-directional three port assemblies of the present utility model;
Fig. 2 represents the another kind of embodiment of single fiber bi-directional three port assemblies of the present utility model.
Embodiment
Describe the utility model most preferred embodiment in detail below in conjunction with accompanying drawing.
Single fiber bi-directional three port assemblies 100 as shown in Figure 1, comprise a base 101, be provided with in the base 101: lens adopt curved end and plate light splitting piece 107, a globe lens 109, a FP laser instrument 103, first optical receiver 104 and second optical receiver 105 the single fiber collimating apparatus 102 of 1260-1360nm anti-reflection film, becomes filter plate 106, about 45 degree to become 135 to spend with optical axis with optical axis about.It is that the optical signals globe lens 109 of λ 1 is transformed into parallel beam that FP laser instrument 103 sends wavelength, this parallel beam is divided into two light beam: λ 1 transmitted light beams and λ 1 folded light beam after being incident to light splitting piece 107 according to a certain percentage, λ 1 folded light beam is absorbed by the extinction device 108 that is provided with in the base 101, this extinction device both can be the extinction groove of offering at base 101 inwalls with light-absorbing coating, also can be on base 101, to offer a through hole, the outside of through hole is then by the sealing of extinction lid, and λ 1 transmitted light beam then is incident to filter plate 106 backs by the 102 coupling outputs of single fiber collimating apparatus.Simultaneously, the wavelength opposite with this λ 1 transmitted light beam direction is that the light signal of λ 1a and λ 2 then inputs to filter plate 106 by single fiber collimating apparatus 102, the light signal of 106 couples of λ 2 of filter plate is done to be received by first optical receiver 104 after the total reflection, light signal to λ 1a then carries out being incident to light splitting piece 107 behind the total transmissivity, light splitting piece 107 is divided into two light beams according to certain ratio with the light signal of λ 1a: λ 1a transmitted light beam and λ 1a folded light beam, λ 1a folded light beam is received by second optical receiver 105, and λ 1a transmitted light beam is also absorbed by extinction device 108.Wherein, first optical receiver 104 and second optical receiver 105 all adopt band lens pipe cap, and directional light is focused on the optical receiver chip.The light signal of λ 1a and λ 1, its wavelength coverage is 1260-1360nm, as 1310.The wavelength coverage of λ 2 is 1540-1570nm, 1550, so just, form 1310/1310/1550nm dual wavelength single fiber bi-directional three port assemblies, be about to the 1550nm window and be used for descending simulation CATV transmission, the 1310nmFP laser light source is used for numerous terminal users' uplink, and descending digital transmission also adopts the 1310nmFP laser instrument.And the cost of FP laser instrument is lower with respect to the 1490nmDFB laser instrument, and like this, 1310/1310/1550nm dual wavelength single fiber bi-directional three port assemblies meet the requirement of low-cost point-to-point transmission technology.
Single fiber bi-directional three port assemblies 200 as shown in Figure 2, comprise a base 201, be provided with in the base 201: lens adopt curved end and plate light splitting piece 207, a globe lens 209, a FP laser instrument 203, first optical receiver 204 and second optical receiver 205 and extinction device 208 the single fiber collimating apparatus 202 of 1260-1360nm anti-reflection film, becomes filter plate 206, about 45 degree to become 45 to spend with optical axis with optical axis about.Single fiber bi-directional three port assemblies of this kind structure are except the angle of light splitting piece is different with light splitting piece shown in Figure 1, and its action principle is identical, no longer describe.
Claims (8)
1, a kind of single fiber bi-directional three port assemblies, it is characterized in that, comprise a base, comprise in this base: a single fiber collimating apparatus, one becomes the filter plates at 45 degree or 135 degree angles with optical axis, one becomes the light splitting pieces at 45 degree or 135 degree angles with optical axis, one lens, one laser instrument, first optical receiver and second optical receiver, an and extinction device, this extinction device is positioned between described light splitting piece and lens, the described lens of optical signals that described laser instrument sends a wavelength X 1 are transformed into parallel beam, this parallel beam is incident to light splitting piece and produces two light beams: λ, 1 transmitted light beam and λ 1 folded light beam according to a certain percentage, described λ 1 folded light beam is absorbed by described extinction device, λ 1 transmitted light beam is after the whole transmissions of described filter plate, by described single fiber collimating apparatus coupling output; The wavelength opposite with this λ 1 transmitted light beam direction is to be incident to described filter plate after the light signal of λ 1a and λ 2 is then imported by described single fiber collimating apparatus, light signal λ 2 is received by first optical receiver after described filter plate total reflection, light signal λ 1a is incident to described light splitting piece after the whole transmissions of described filter plate, and be divided into two light beams: λ 1a transmitted light beam and λ 1a folded light beam through this light splitting piece, λ 1a folded light beam is received by second optical receiver, and λ 1a transmitted light beam is absorbed by base intracavity.
2, single fiber bi-directional three port assemblies according to claim 1 is characterized in that, described laser instrument is the FP laser instrument.
3, single fiber bi-directional three port assemblies according to claim 2 is characterized in that, described lens are globe lens.
4, single fiber bi-directional three port assemblies according to claim 3 is characterized in that, described extinction device is the extinction groove that a base inner wall is provided with.
5, single fiber bi-directional three port assemblies according to claim 3 is characterized in that, described extinction device comprises: be positioned at the extinction lid that a through hole and this through hole of sealing are set on the base.
6, according to claim 4 or 5 described single fiber bi-directional three port assemblies, it is characterized in that the lens of described single fiber collimating apparatus are curved end and the anti-reflection film that plates 1260nm-1600nm.
7, single fiber bi-directional three port assemblies according to claim 1 is characterized in that, the wavelength coverage of described λ 1 and λ 1a is 1260-1360nm, and the wavelength coverage of λ 2 is 1550-1560nm.
8, single fiber bi-directional three port assemblies according to claim 7 is characterized in that, the wavelength of described λ 1 and λ 1a is 1310nm, and the wavelength coverage of λ 2 is 1550nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200134609U CN2876807Y (en) | 2006-04-07 | 2006-04-07 | Single fiber bidirectional three port assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200134609U CN2876807Y (en) | 2006-04-07 | 2006-04-07 | Single fiber bidirectional three port assembly |
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| Publication Number | Publication Date |
|---|---|
| CN2876807Y true CN2876807Y (en) | 2007-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006200134609U Expired - Lifetime CN2876807Y (en) | 2006-04-07 | 2006-04-07 | Single fiber bidirectional three port assembly |
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| CN (1) | CN2876807Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800218A (en) * | 2010-03-15 | 2010-08-11 | 江苏奥雷光电有限公司 | Coaxial laser integrating optical transmit-receive function |
| US7792399B2 (en) | 2008-01-21 | 2010-09-07 | Japan Aviation Electronics Industry Limited | Optical device |
| CN102778455A (en) * | 2012-07-26 | 2012-11-14 | 杭州华光光电有限公司 | Detection system for colloidal gold immunochromatographic assay (GICA) test paper |
| CN104062722A (en) * | 2014-05-30 | 2014-09-24 | 江苏飞格光电有限公司 | Low-crosstalk same wavelength division multiplexing light receiving-transmitting integrated single-fiber bidirectional device |
| CN103023576B (en) * | 2012-10-01 | 2016-08-24 | 中华电信股份有限公司 | Integrated light detection device capable of improving light brightness-extinction ratio |
| 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 |
| WO2017132834A1 (en) * | 2016-02-02 | 2017-08-10 | 华为技术有限公司 | Single optical fiber bi-directional sub-assembly |
| CN110024308A (en) * | 2017-03-23 | 2019-07-16 | 华为技术有限公司 | Two-way optical assembly, optical network unit, optical line terminal and passive optical network |
| CN111694109A (en) * | 2019-03-14 | 2020-09-22 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical fiber laser coupling device |
-
2006
- 2006-04-07 CN CNU2006200134609U patent/CN2876807Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7792399B2 (en) | 2008-01-21 | 2010-09-07 | Japan Aviation Electronics Industry Limited | Optical device |
| CN101800218A (en) * | 2010-03-15 | 2010-08-11 | 江苏奥雷光电有限公司 | Coaxial laser integrating optical transmit-receive function |
| CN102778455A (en) * | 2012-07-26 | 2012-11-14 | 杭州华光光电有限公司 | Detection system for colloidal gold immunochromatographic assay (GICA) test paper |
| CN102778455B (en) * | 2012-07-26 | 2014-12-10 | 杭州华光光电有限公司 | Detection system for colloidal gold immunochromatographic assay (GICA) test paper |
| CN103023576B (en) * | 2012-10-01 | 2016-08-24 | 中华电信股份有限公司 | Integrated light detection device capable of improving light brightness-extinction ratio |
| CN104062722A (en) * | 2014-05-30 | 2014-09-24 | 江苏飞格光电有限公司 | Low-crosstalk same wavelength division multiplexing light receiving-transmitting integrated single-fiber bidirectional device |
| WO2017132834A1 (en) * | 2016-02-02 | 2017-08-10 | 华为技术有限公司 | Single optical fiber bi-directional sub-assembly |
| 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 |
| CN110024308A (en) * | 2017-03-23 | 2019-07-16 | 华为技术有限公司 | Two-way optical assembly, optical network unit, optical line terminal and passive optical network |
| CN110024308B (en) * | 2017-03-23 | 2021-05-18 | 华为技术有限公司 | Bidirectional optical component, optical network unit, optical line terminal and passive optical network system |
| CN111694109A (en) * | 2019-03-14 | 2020-09-22 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical fiber laser coupling device |
| CN111694109B (en) * | 2019-03-14 | 2022-02-01 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical fiber laser coupling device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070307 |
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| EXPY | Termination of patent right or utility model |