CN201260172Y - Light path coupling structure and optical module having the coupling structure - Google Patents
Light path coupling structure and optical module having the coupling structure Download PDFInfo
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- CN201260172Y CN201260172Y CNU2008201719835U CN200820171983U CN201260172Y CN 201260172 Y CN201260172 Y CN 201260172Y CN U2008201719835 U CNU2008201719835 U CN U2008201719835U CN 200820171983 U CN200820171983 U CN 200820171983U CN 201260172 Y CN201260172 Y CN 201260172Y
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- lightwave signal
- optical assembly
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Abstract
The utility model discloses an optical path coupling structure and an optical module with the coupling structure, which comprises an optical assembly integrating emission and reception and an optical emission assembly, wherein the optical assembly integrating emission and reception comprises a first port and a second port, and the optical emission assembly is connected with the second port; a laser device, a photoelectrical detector and at least two optical filter sheets are arranged in the optical assembly integrating emission and reception; a first light-wave signal emitted by the laser device is transmitted by the first optical filter sheet and is transmitted to the second optical filter sheet, and the first light-wave signal is reflected by the second optical filter sheet and is then transmitted to the photoelectrical detector; a third light-wave signal emitted by the optical emission assembly is transmitted to the first optical filter sheet through the second port, and is reflected by the first optical filter sheet and is then output from the first port. The optical filter sheets arranged in the optical emission assembly are used for coupling emission optical signals and reception optical signals, thereby reducing the volume of the module and optical power loss.
Description
Technical field
The utility model relates to a kind of light path coupled structure, specifically, relates to a kind of light path coupled structure that is used for ethernet passive optical network with the 10Gbps optical module, belongs to the optical communication technique field.
Background technology
At present, ethernet passive optical network optical line terminal commonly used all is 1.25Gbps with the upstream rate and the downstream rate of the integrated module of optical transceiver.For reducing the optical fiber usage quantity, the most employing of module will be launched light wave and be received the transceiver optical assembly that light wave is coupled, and link to each other with described optical assembly by an optical fiber, realize the single fiber bi-directional transfer function, as shown in Figure 1.Along with the continuous development of optical communication technique and user to the improving constantly of bandwidth demand, engendered the asymmetric 10,000,000,000 EPON optical modules that can transmit 1.25Gbps and 10Gbps speed lightwave signal simultaneously.And existing transceiver optical assembly is difficult to accomplish bigger isolation with present technological level, is difficult to realize the asymmetric coupling between 1.25Gbps and the 10Gbps speed, can not satisfy the user demand of asymmetric 10,000,000,000 EPON.
For realizing the multidirectional transmission of single fiber of high speed optical fiber transceiver module, someone proposes in optical module inside the membrane wave division multiplexer to be set, high-speed light emitting module is connected with the port of membrane wave division multiplexer respectively with low speed transceiver optical assembly, three road light signals are coupled, optical fiber of public port connection by the membrane wave division multiplexer carries out the transmission of light signal then, as shown in Figure 2.Though this coupled structure has realized the coupling of high speed 10Gbps light signal and low speed 1.25Gbps light signal, but, this coupled structure exists following shortcoming: at first, because the membrane wave division multiplexer occupies certain space, thereby make that the volume of optical module is bigger, the development trend of incompatibility optical communication system miniaturization; Secondly, exist the secondary coupling of light signal between light emission component and transceiver optical assembly and the membrane wave division multiplexer, thereby increased the loss of luminous power; Once more, adopt the coupled structure of membrane wave division multiplexer need a large amount of tail fiber discs around, thereby brought extra optical power loss, and this class loss can not budget.
Summary of the invention
The problems referred to above that the utility model exists for the light path coupled structure that solves prior art high speed optical module, a kind of light path coupled structure is provided, multichannel is launched light signal and receiving optical signals is coupled by the filter that is arranged on transceiver optical assembly inside, thereby reduced the module volume, reduced the loss of luminous power.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of light path coupled structure comprises transceiver optical assembly and light emission component, and described transceiver optical assembly includes first port and second port, and described light emission component is connected with described second port; Be provided with laser, photodetector and at least two filters in described transceiver optical assembly inside, wherein, first lightwave signal of described laser emission reaches first filter after the second filter transmission, export from described first port after the described first filter transmission; After the described first filter transmission, reach described second filter from second lightwave signal of described first port input, after described second filter reflection, reach described photodetector again; The 3rd lightwave signal of described light emission component emission reaches described first filter through described second port, exports from described first port after described first filter reflection.
According to the utility model, for further stoping described first lightwave signal and described the 3rd lightwave signal to seal in the described photodetector, improve the light transmittance of described second lightwave signal, described transceiver optical assembly inside also is provided with the 3rd filter, described second lightwave signal reaches described the 3rd filter after described second filter reflection, reach described photodetector again after described the 3rd filter transmission.
According to the utility model, described light emission component is 10.3125Gbps TOSA, and the emission rate of described laser is 1.25Gbps, and the receiving velocity of described photodetector is 1.25Gbps.
According to the utility model, described second port connects described light emission component by tail optical fiber.
The invention also discloses a kind of optical module, described optical module comprises transceiver optical assembly and light emission component, it is characterized in that described transceiver optical assembly includes first port and second port, described light emission component is connected with described second port; Be provided with laser, photodetector and at least two filters in described transceiver optical assembly inside, wherein, first lightwave signal of described laser emission reaches first filter after the second filter transmission, export from described first port after the described first filter transmission; After the described first filter transmission, reach described second filter from second lightwave signal of described first port input, after described second filter reflection, reach described photodetector again; The 3rd lightwave signal of described light emission component emission reaches described first filter through described second port, exports from described first port after described first filter reflection.
According to the utility model, for further stoping described first lightwave signal and described the 3rd lightwave signal to seal in the described photodetector, improve the light transmittance of described second lightwave signal, described transceiver optical assembly inside also is provided with the 3rd filter, described second lightwave signal reaches described the 3rd filter after described second filter reflection, reach described photodetector again after described the 3rd filter transmission.
According to the utility model, described light emission component is 10.3125Gbps TOSA, and the emission rate of described laser is 1.25Gbps, and the receiving velocity of described photodetector is 1.25Gbps.
According to the utility model, described first port is connected with the public output mouth of tail optical fiber as optical module; Described second port connects described light emission component by tail optical fiber.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is integrated optical filter in the transceiver optical assembly of low speed, high-speed light emitting module is connected with a port of transceiver optical assembly, realize multipath reception light signal and the coupling of launching light signal by filter, can bring up to the isolation between the lightwave signal of different wave length more than the 30dB, avoid crosstalking between the different wave length signal.Because the filter volume is little, loss is low, isolation is higher, therefore, realize the light path coupling at the inner filter that adopts of optical module, reduced the volume of optical module, reduced the secondary excess loss of luminous power.And this light path coupled structure is simple, with low cost, can realize the coupling between 1.25Gbps burst and the 10Gbps continuous signal at an easy rate, has effectively improved the reliability of optical module, and is user-friendly.
Description of drawings
Fig. 1 is the principle schematic that optical module is realized a kind of mode of optical signal transmission in the prior art;
Fig. 2 is the principle schematic that optical module is realized the another kind of mode of optical signal transmission in the prior art;
Fig. 3 is the operation principle schematic diagram of the utility model light path coupled structure.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
In the used optical module of asymmetric 10Gbps EPON OLT, the lightwave signal of optical module emission has wavelength that two lightwave signals of 1577nm and 1490nm are arranged, wherein, wavelength is that the emission lightwave signal speed of 1577nm is 10.3125Gbps, continuous mode, wavelength is that the emission lightwave signal speed of 1490nm is 1.25Gbps, burst mode.The lightwave signal wavelength that optical module receives is 1310nm, and speed is 1.25Gbps, continuous mode.
See also the operation principle schematic diagram of the light path coupled structure shown in Fig. 3.Described light path coupled structure comprises transceiver optical assembly and the 10.3125Gbps light emission component of 1.25Gbps, and described transceiver optical assembly comprises the first port Com mouth and the second port Refl ect mouth.For realizing the asymmetric 10Gbps EPON OLT coupling with the receiving optical signals of the emission light signal of the emission light signal of 10.3125Gbps in the optical module and 1.25Gbps and 1.25Gbps, described coupled structure is connected with the Reflect mouth of the transceiver optical assembly of described 1.25Gbps the light emission component of 10.3125Gbps by tail optical fiber.And in 1.25Gbps transceiver optical assembly, except that being provided with the 1.25Gbps laser that is used for launching lightwave signal and receive outside the 1.25Gbps photodetector of lightwave signal, also be provided with three filters, i.e. first filter, second filter and the 3rd filter.
Wherein, 10.3125Gbps the speed of light emission component emission is 10.3125Gbps, wavelength is the 3rd lightwave signal of 1577nm is transported to transceiver optical assembly inside through the Reflect oral instructions first filter, after the reflection of first filter, from the Com mouth output of transceiver optical assembly.By controlling the thickness of first filter, can make the energy of the 3rd lightwave signal more than 98% by this filter reflection.
1.25Gbps the laser emission rate is 1.25Gbps, wavelength is first lightwave signal of 1490nm, this first lightwave signal reaches first filter after the second filter transmission, is exported by the Com mouth after the first filter transmission again.Select rational first filter and second filter, make these two filters all have anti-reflection function first lightwave signal.
From the speed of Com mouth input is that 1.25Gbps, wavelength are that second lightwave signal of 1310nm reaches second filter after the first filter transmission, after second filter reflection, reach the 3rd filter, and then the photodetector that reaches 1.25Gbps after the 3rd filter transmission receives.
By the 3rd filter is set, first lightwave signal and the 3rd lightwave signal that may transfer to the 3rd filter can be filtered out, prevent that further this two-way lightwave signal from sealing in the 1.25Gbps photodetector, improve the isolation between the different wave length light wave signal.
The Com mouth of above-mentioned transceiver optical assembly can connect tail optical fiber directly as the public output mouth of optical module, carries out the transmission of light signal with optical communication system, realizes the multidirectional transfer function of single fiber.
Light path coupled structure described in the utility model is carried out the light path coupling by integrated optical filter in low speed transceiver optical assembly, not only can save the space of optical module, reduce the secondary loss of luminous power, and realized coupling between 1.25Gbps burst transmissions signal, the continuous received signal of 1.25Gbps and the 10.3125Gbps continuous signal at an easy rate, improved the reliability of optical module.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; 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 (8)
1, a kind of light path coupled structure comprises transceiver optical assembly and light emission component, it is characterized in that, described transceiver optical assembly includes first port and second port, and described light emission component is connected with described second port; Be provided with laser, photodetector and at least two filters in described transceiver optical assembly inside, wherein, first lightwave signal of described laser emission reaches first filter after the second filter transmission, export from described first port after the described first filter transmission; After the described first filter transmission, reach described second filter from second lightwave signal of described first port input, after described second filter reflection, reach described photodetector again; The 3rd lightwave signal of described light emission component emission reaches described first filter through described second port, exports from described first port after described first filter reflection.
2, light path coupled structure according to claim 1, it is characterized in that, described transceiver optical assembly inside also is provided with the 3rd filter, described second lightwave signal reaches described the 3rd filter after described second filter reflection, reach described photodetector again after described the 3rd filter transmission.
3, light path coupled structure according to claim 1 and 2 is characterized in that, described light emission component is 10.3125Gbps TOSA, and the emission rate of described laser is 1.25Gbps, and the receiving velocity of described photodetector is 1.25Gbps.
4, light path coupled structure according to claim 3 is characterized in that, described second port connects described light emission component by tail optical fiber.
5, a kind of optical module comprises transceiver optical assembly and light emission component, it is characterized in that, described transceiver optical assembly includes first port and second port, and described light emission component is connected with described second port; Be provided with laser, photodetector and at least two filters in described transceiver optical assembly inside, wherein, first lightwave signal of described laser emission reaches first filter after the second filter transmission, export from described first port after the described first filter transmission; After the described first filter transmission, reach described second filter from second lightwave signal of described first port input, after described second filter reflection, reach described photodetector again; The 3rd lightwave signal of described light emission component emission reaches described first filter through described second port, exports from described first port after described first filter reflection.
6, light path coupled structure according to claim 5, it is characterized in that, described transceiver optical assembly inside also is provided with the 3rd filter, described second lightwave signal reaches described the 3rd filter after described second filter reflection, reach described photodetector again after described the 3rd filter transmission.
7, according to claim 5 or 6 described light path coupled structures, it is characterized in that described light emission component is 10.3125Gbps TOSA, the emission rate of described laser is 1.25Gbps, and the receiving velocity of described photodetector is 1.25Gbps.
8, light path coupled structure according to claim 7 is characterized in that, described first port is connected with the public output mouth of tail optical fiber as optical module; Described second port connects described light emission component by tail optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201719835U CN201260172Y (en) | 2008-09-27 | 2008-09-27 | Light path coupling structure and optical module having the coupling structure |
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| CNU2008201719835U CN201260172Y (en) | 2008-09-27 | 2008-09-27 | Light path coupling structure and optical module having the coupling structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457666A (en) * | 2012-05-29 | 2013-12-18 | 鸿富锦精密工业（深圳）有限公司 | Bidirectional dual-frequency light transmission module and transmission component thereof |
| CN113759473A (en) * | 2020-06-05 | 2021-12-07 | 华为技术有限公司 | Transmitting-receiving optical assembly, electronic equipment and optical communication system |
-
2008
- 2008-09-27 CN CNU2008201719835U patent/CN201260172Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457666A (en) * | 2012-05-29 | 2013-12-18 | 鸿富锦精密工业（深圳）有限公司 | Bidirectional dual-frequency light transmission module and transmission component thereof |
| CN113759473A (en) * | 2020-06-05 | 2021-12-07 | 华为技术有限公司 | Transmitting-receiving optical assembly, electronic equipment and optical communication system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090617 |