CN202077033U - Single-fiber two-way optical transceiver module optical subassembly for 10G PON (Passive Optical Network) - Google Patents
Single-fiber two-way optical transceiver module optical subassembly for 10G PON (Passive Optical Network) Download PDFInfo
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- CN202077033U CN202077033U CN2011201364473U CN201120136447U CN202077033U CN 202077033 U CN202077033 U CN 202077033U CN 2011201364473 U CN2011201364473 U CN 2011201364473U CN 201120136447 U CN201120136447 U CN 201120136447U CN 202077033 U CN202077033 U CN 202077033U
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Abstract
The utility model relates to a single-fiber two-way optical transceiver module optical subassembly for the 10G PON. An SC connector is arranged at a position symmetrical to a transmitting terminal and a receiving terminal, a first filter is arranged between the transmitting terminal and the SC connector, and makes the angle of 45 degrees with the direction of incident light, and a first prism is arranged between the first filter and the transmitting terminal; a second filter is arranged between the first filter and the receiving terminal, a second prism and a first lens are sequentially arranged between the first filter and the second filter, and a second lens is arranged between the second filter and the receiving terminal. The downlink band isolation of the single-fiber two-way optical transceiver module optical subassembly can meet the 10G PON standard, moreover, main performance, such as optical output power and receiving sensitivity, can meet 10G PON requirements, and in terms of the shape, the single-fiber two-way optical transceiver module optical subassembly can be packaged in a SFP plus (Enhanced Small Form-factor Pluggable) module.
Description
Technical field
The utility model relates to the single fiber bi-directional optical transceiver module in the optical communication technique, relates in particular to the single fiber bi-directional optical transceiver module optical assembly of a kind of 10G of being used for PON.
Background technology
The application of fiber optic network at present is more and more universal, and the FTTH (Fiber To The Home, Fiber to the home) of optical fiber access all over the world project is progressively implemented.As the main access technology of FTTH, EPON (Ethemet PON, ethernet passive optical network)/GPON (Gigabit-Capable PON, gigabit passive optical network) has high bandwidth, high efficiency, large coverage, extensibility is good, characteristics such as technology is simple, and the realization multicast is convenient, other optical-fiber network access technologies are more favored relatively.
Along with the formal startup of integration of three networks pilot and the continuous aggravation of broadband services market competition, EPON/GPON can not meet the demands, and 10G PON is the inexorable trend of future development.
The downstream signal wave band of 10G PON is 1575～1580nm, because inevitable coexistence demand in the whole net evolution process, 10G PON need keep enough bandwidth and be used for existing PON and CATV signal, so 10G PON optical module should reduce the influence of crosstalking between unlike signal and bringing to greatest extent.The frequency spectrum planning of 10GPON, as shown in Figure 1,1575～1580nm is the downlink working wave band of 10G PON, the wave band beyond this service band needs good service band isolation.Simultaneously, 10GPON also requires optical module that the receiving sensitivity of higher Output optical power and Geng Gao is arranged.
The principle of traditional single fiber bi-directional optical assembly that is used for PON as shown in Figure 2, downstream signal enters the optical frames group by optical fiber, in the optical frames group, first filter plate 33 is miter angle with light path, 90 degree reflections take place through first filter plate 33 in light path, through 34 filtering of second filter plate, enter receiving terminal 2 then again.Receiving terminal 2 adopts the APD-TIA assembly, and APD (Avalanche Photo Diode, avalanche photodide) is a kind of photo-detector, is used for opto-electronic conversion, and TIA (Trans Impedance Amplifier, trans-impedance amplifier) is used for the signal of telecommunication and amplifies.Transmitting terminal 1 adopts high power D FB (Distributed Feed Back, distributed feed-back type) laser, and transmitting terminal 1 light path enters optical fiber through behind the optical isolator 35 through first filter plate 33.The receiving terminal incident light has certain angle of divergence, makes the characteristic of second filter plate 34 be difficult to satisfy 10G PON downstream band insulated degree requirement; The transmitting terminal light path is subjected to the aberration influence simultaneously, and coupling efficiency is low, is difficult for satisfying the requirement of 10G PON to Output optical power; Receiving terminal and back-end circuit plate are 90 degree to be placed, relatively poor with back-end circuit plate connection reliability; The lengthwise dimension of whole single fiber bi-directional optical assembly is bigger, and the I weld size generation that back and circuit board are installed conflicts, and is difficult for encapsulating in the SFP+ module.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, the single fiber bi-directional optical transceiver module optical assembly of a kind of 10GPON of being used for is provided, effectively solve the relatively poor problem of traditional single fiber bi-directional optical assembly downstream band isolation, and it is bigger to solve size, be difficult in the SFP+ module, encapsulating problems such as low Output optical power.
The purpose of this utility model is achieved through the following technical solutions:
The single fiber bi-directional optical transceiver module optical assembly that is used for 10G PON, comprise transmitting terminal, receiving terminal and optical frames group, described transmitting terminal and the parallel side by side placement of receiving terminal, characteristics are: described optical frames group comprises first prism, second prism, first filter plate, second filter plate, first lens and second lens, SC type connector places the symmetric position of transmitting terminal and receiving terminal, between transmitting terminal and SC type connector, arrange first filter plate, first filter plate and incident light direction are miter angle, and arrange first prism between first filter plate and transmitting terminal; Be furnished with second filter plate between first filter plate and the receiving terminal, between first filter plate and second filter plate, arrange second prism and first lens successively, between second filter plate and receiving terminal, be furnished with second lens.
Further, the above-mentioned single fiber bi-directional optical transceiver module optical assembly that is used for 10G PON is furnished with optical isolator between the described transmitting terminal and first prism.
Substantive distinguishing features and obvious improvement that technical solutions of the utility model are outstanding are mainly reflected in:
The utility model is by being provided with two filters at receiving terminal, make that the light that incides on the filter is directional light, between second prism and second filter plate, place first lens, incident light is collimated, feasible light through second filter plate is directional light, help the filter design like this, make the downstream band isolation of optical assembly can meet the requirement of 10G PON the optical module optical assembly; Second lens are set between second filter plate and receiving terminal, light path is focused on, make the spot radius that incides receiving terminal reduce, improve receiving terminal sensitivity, also effectively reduce of the influence of lens spherical aberration to receiving terminal, thereby improve receiving terminal sensitivity, can satisfy the requirement of 10G PON down high speed transmission performance; Transmitting terminal and the parallel side by side placement of receiving terminal are compared with traditional vertical placement, and it is connected convenient with the circuit board of rear end, increased connective stability, and connecting plate length is short, helps high-frequency signal transmission; In addition, be more suitable for compact package, compare with traditional design, total length has lacked 2 millimeter, gives the bigger space of board design; The transmitting terminal light path is not subjected to the influence of aberration, the coupling efficiency height; The receiving terminal light path design has reduced the focal beam spot radius, has increased the encapsulation error margin, helps producing in batches.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: 10G PON downstream signal frequency spectrum planning;
Fig. 2: the light path principle schematic diagram of traditional single fiber bi-directional optical assembly;
Fig. 3: light path principle schematic diagram of the present utility model;
Fig. 4 a: the utility model transmitting terminal light path schematic diagram;
Fig. 4 b: the utility model transmitting terminal light path adjustment figure.
The implication of each Reference numeral sees the following form among the figure:
Embodiment
As shown in Figure 3, the single fiber bi-directional optical transceiver module optical assembly that is used for 10G PON, comprise transmitting terminal 1, receiving terminal 2 and optical frames group 3, described transmitting terminal 1 and the parallel side by side placement of receiving terminal 2, optical frames group 3 comprises first prism 31, second prism 32, first filter plate 33, second filter plate 34, first lens 36 and second lens 37, SC type connector 4 places the symmetric position of transmitting terminal 1 and receiving terminal 2, between transmitting terminal 1 and SC type connector 4, arrange first filter plate 33, first filter plate 33 is miter angle with the incident light direction, and between first filter plate 33 and transmitting terminal 1, arrange first prism 31, be furnished with optical isolator 35 between the transmitting terminal 1 and first prism 31; Be furnished with second filter plate 34 between first filter plate 33 and the receiving terminal 2, between first filter plate 33 and second filter plate 34, arrange second prism 32 and first lens 36 successively, between second filter plate 34 and receiving terminal 2, be furnished with second lens 37.
Transmitting terminal 1 comprises the standard TO48 encapsulation of Distributed Feedback Laser and one group of non-spherical lens.Receiving terminal 2 comprises the standard TO48 encapsulation of APD-TIA receiver and flat glass mirror.During emission, 90 degree deflections take place through first prism 31 after seeing through optical isolator 35 in the light path of transmitting terminal, through first filter plate 33 90 degree deflections take place again and enter SC type connector 4; During reception, outer light source enters first lens 36 through second prism 32 again through first filter plate 33 and is collimated into directional light by SC type connector 4 directives first filter plate 33, then by 34 filtering of second filter plate, focus on through second lens 37 again, receive by receiver 2.
Between second prism 32 and second filter plate 34, place first lens 36, incident light is collimated, feasible light through second filter plate 34 is directional light, helps the filter design like this, makes the downstream band isolation of optical assembly can meet the requirement of 10G PON to the optical module optical assembly; Second lens 37 are set between second filter plate 34 and receiving terminal 2, light path is focused on, make the spot radius that incides receiving terminal reduce, improve receiving terminal sensitivity; Simultaneously first lens 36 and second lens 37 are placed according to Fig. 3 mode, can be effectively reduced of the influence of lens spherical aberration, thereby improve receiving terminal sensitivity, make the utility model can satisfy the requirement of 10G PON down high speed transmission performance receiving terminal.
Optical isolator 35 is set, reduces the harmful effect of reverberation greatly, improve the high-speed transfer performance the light source light spectrum output power stability.
The utility model is guaranteeing to make under the unobstructed situation of light path the parallel side by side placement of transmitting terminal 1 and receiving terminal 2 by first prism 31 and second prism 32 are set in the optical frames group; Under the performance requirement prerequisite that satisfies the high Output optical power of 10GPON, high receiving sensitivity, make single fiber bi-directional length component direction reduce 2 millimeters, be fit to the encapsulation of SFP+ standard module on the external form.
The utility model also comprises the transmitting terminal optical path adjustment device, and shown in Fig. 4 a, device comprises red laser 51, printing opacity screen 52 and speculum 53.Printing opacity screen 52 is placed between red laser 51 and the speculum 53, open red laser 51, ruddiness incides speculum 53 through printing opacity screen 52, and reflection to red light is to printing opacity screen 52 then.Adjust speculum 53, make printing opacity shield two hot spots coincidences on 52, promptly be considered as the device adjustment and finish.Then first prism 31 and first filter plate 33 are placed between red laser 51 and the printing opacity screen 52.Shown in Fig. 4 b, open red laser 51,90 degree total reflections take place through first prism 31 in ruddiness, through first filter 33 90 degree reflections take place then, incide speculum 53 through printing opacity screen 52, and reflection to red light is to printing opacity screen 52 then.Adjust first prism 31 and first filter plate, 33 relative positions, make printing opacity shield two hot spots coincidences on 52, promptly be considered as the adjustment of transmitting terminal light path and finish.
In sum, the single fiber bi-directional optical transceiver module optical assembly that is used for 10G PON of the utility model design, compare with traditional single fiber bi-directional optical transceiver module optical assembly, higher downstream band isolation is arranged, has higher transmitting terminal coupling efficiency simultaneously, higher receiving terminal sensitivity, volume is little, the reliability height, single fiber bi-directional optical transceiver module optical assembly of the present utility model better satisfies 10G PON standard on main performances such as downstream band isolation, Output optical power, receiving sensitivity, be fit to the encapsulation of SFP+ standard module on the external form.
What need understand is: the above only is a preferred implementation of the present utility model; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (2)
1. the single fiber bi-directional optical transceiver module optical assembly that is used for 10G PON, comprise transmitting terminal (1), receiving terminal (2) and optical frames group (3), described transmitting terminal (1) and the parallel side by side placement of receiving terminal (2), it is characterized in that: described optical frames group (3) comprises first prism (31), second prism (32), first filter plate (33), second filter plate (34), first lens (36) and second lens (37), SC type connector (4) places the symmetric position of transmitting terminal (1) and receiving terminal (2), between transmitting terminal (1) and SC type connector (4), arrange first filter plate (33), first filter plate (33) and incident light direction miter angle, and between first filter plate (33) and transmitting terminal (1), arrange first prism (31); Be furnished with second filter plate (34) between first filter plate (33) and the receiving terminal (2), between first filter plate (33) and second filter plate (34), arrange second prism (32) and first lens (36) successively, between second filter plate (34) and receiving terminal (2), be furnished with second lens (37).
2. the single fiber bi-directional optical transceiver module optical assembly that is used for 10G PON according to claim 1 is characterized in that: be furnished with optical isolator (35) between described transmitting terminal (1) and first prism (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201364473U CN202077033U (en) | 2011-05-03 | 2011-05-03 | Single-fiber two-way optical transceiver module optical subassembly for 10G PON (Passive Optical Network) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201364473U CN202077033U (en) | 2011-05-03 | 2011-05-03 | Single-fiber two-way optical transceiver module optical subassembly for 10G PON (Passive Optical Network) |
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| CN202077033U true CN202077033U (en) | 2011-12-14 |
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| CN2011201364473U Expired - Fee Related CN202077033U (en) | 2011-05-03 | 2011-05-03 | Single-fiber two-way optical transceiver module optical subassembly for 10G PON (Passive Optical Network) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183827A (en) * | 2011-05-03 | 2011-09-14 | 苏州旭创科技有限公司 | Single-fiber bidirectional optical transceiver module light assembly for 10G passive optical network (PON) |
| CN103487899A (en) * | 2013-09-17 | 2014-01-01 | 中国科学院半导体研究所 | Single-fiber bi-directional light receiving and emitting device |
| WO2017071021A1 (en) * | 2015-10-30 | 2017-05-04 | 武汉光迅科技股份有限公司 | Bosa device having adjustable wavelength in two directions |
| CN108776374A (en) * | 2018-06-27 | 2018-11-09 | 大连优迅科技有限公司 | Light path system suitable for small-sized encapsulated transceiving device |
-
2011
- 2011-05-03 CN CN2011201364473U patent/CN202077033U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183827A (en) * | 2011-05-03 | 2011-09-14 | 苏州旭创科技有限公司 | Single-fiber bidirectional optical transceiver module light assembly for 10G passive optical network (PON) |
| CN103487899A (en) * | 2013-09-17 | 2014-01-01 | 中国科学院半导体研究所 | Single-fiber bi-directional light receiving and emitting device |
| CN103487899B (en) * | 2013-09-17 | 2015-04-15 | 中国科学院半导体研究所 | Single-fiber bi-directional light receiving and emitting device |
| WO2017071021A1 (en) * | 2015-10-30 | 2017-05-04 | 武汉光迅科技股份有限公司 | Bosa device having adjustable wavelength in two directions |
| US10197749B2 (en) | 2015-10-30 | 2019-02-05 | Accelink Technologies Co., Ltd. | BOSA device having adjustable wavelength in two directions |
| CN108776374A (en) * | 2018-06-27 | 2018-11-09 | 大连优迅科技有限公司 | Light path system suitable for small-sized encapsulated transceiving device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20150503 |
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| EXPY | Termination of patent right or utility model |