CN201867513U - PD-WDM (photodetector-wavelength division multiplex) integrated optical device - Google Patents
PD-WDM (photodetector-wavelength division multiplex) integrated optical device Download PDFInfo
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- CN201867513U CN201867513U CN2010202792873U CN201020279287U CN201867513U CN 201867513 U CN201867513 U CN 201867513U CN 2010202792873 U CN2010202792873 U CN 2010202792873U CN 201020279287 U CN201020279287 U CN 201020279287U CN 201867513 U CN201867513 U CN 201867513U
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Abstract
The utility model discloses a PD-WDM (photodetector-wavelength division multiplex) integrated optical device which comprises a collimator, a WDM optical filter, a self-focusing coupling lens and a photodetector (PD) sequentially connected together. The collimator is used for wavelength division multiplex and collimation of an input combined optical signal with different wavelengths; the WDM optical filter is used for selecting the optical signal with required wavelength; the self-focusing coupling lens is used for secondary coupling of the input optical signal and lessening facula converged in the PD; and the PD is used for converting the optical signal which goes through the secondary coupling by the self-focusing coupling lens into an electric signal. In the utility model, the secondary coupling is realized by using the self-focusing lens, the responsivity and bandwidth of the device are greatly improved; therefore, the applicability of the device is improved. In addition, second-order and third-order indexes of the device are improved by adopting facula far-focus technology; and the index of return loss for the device can be controlled by monitoring the return loss of the device in real time.
Description
Technical field
The utility model relates to the optical communication technique field, is specifically related to a kind of PD-WDM integrated optical device.
Background technology
Optical wavelength-division multiplex (Wavelength Division Multiplexing, be called for short WDM) technology be with the light modulating signal of the different optical wavelength in each road by transmitting in optical wavelength multiplexing to an optical fiber, thereby improve a kind of economical and practical means of optical fiber communication capacity.The development of light WDM technology has been experienced from broadband optical wavelength-division multiplex, narrow band light wavelength-division multiplex, to intensive optical wavelength-division multiplex (DWDM), the evolution of multiplexing (Optical OADM) of intersecting.
In the optical wavelength-division multiplex, all be a kind of main device developing direction based on the device of optical film filter.Based on the general coupling element that adopts single-mode fiber I/O, lenticule as light in the light wavelength division multiplexing device of optical film filter.That DWDM generally has is several, tens even a hundreds of optical wavelength (channel).Photodiode (PD, Photo Diode) is called photodetector again, belong to the active device in the optical communication field, and the WDM device belongs to passive device.The PD-WDM device has been realized the integrated of optical device, can be widely used in fields such as optical fiber communication, CATV (cable television), fiber optic network monitoring and optical device module.At present, two waveband PD-WDM device technology is comparative maturity and begin to use abroad, and triband PD-WDM device also is in conceptual phase.At present, mainly be to adopt direct-coupled mode to realize the integrated of device for this device both at home and abroad.
In research and practice process to prior art, the inventor finds that there is following problem in prior art:
Existing technology is to adopt directly coupling, and this direct-coupled mode has apparent in view defective, and its coupling hot spot is bigger, and the light-sensitive surface of the PD of employing is also big, so the optical responsivity of device is just low, narrow bandwidth, thus restricted the application of this class device.
The utility model content
The technical matters that the utility model embodiment will solve provides a kind of PD-WDM integrated optical device, can improve the optical responsivity of device and increase bandwidth, thereby improve the application of device.
For solving the problems of the technologies described above, embodiment provided by the utility model is achieved through the following technical solutions:
The utility model provides a kind of PD-WDM integrated optical device:
Comprise the collimating apparatus, wave division multiplexing WDM optical filter, self-focusing coupled lens, the photoelectric detector PD that connect successively;
Described collimating apparatus is used for the light signal that the different wave length of importing makes up is played the multiplexing and collimation of wavelength-division;
Described WDM optical filter is used to choose the light signal of required wavelength;
Described self-focusing coupled lens is used for the light signal of input is carried out the secondary coupling, and the hot spot that converges to PD is diminished;
Photoelectric detector PD, the light signal that is used for carrying out through described self-focusing coupled lens after secondary is coupled is converted to electric signal.
Further, described collimating apparatus is a double-fiber collimator.
Further, the wavelength of the light signal of the different wave length combination of importing in the described collimating apparatus is 1310/1490/1550nm, the wavelength of the light signal that is reflected away by the other end of collimating apparatus is 1310/1490nm, and the wavelength of handling the light signal of back input photoelectric detector PD through described WDM optical filter and described self-focusing coupled lens is 1550nm.
Further, described self-focusing coupled lens adopts burnt coupling technique far away to improve the bandwidth of integrating optical wavelength division multiplex device when being coupled.
Further, described WDM optical filter is a deielectric-coating narrow-band interference filter plate.
Further, the described collimating apparatus that connects successively, wave division multiplexing WDM optical filter, self-focusing coupled lens, photoelectric detector PD adopt laser welding technology to realize encapsulation.
Technique scheme as can be seen, owing to increased WDM optical filter and GRIN Lens in the device of the present utility model, utilize GRIN Lens to realize the secondary coupling, therefore adopt direct coupling technique different, thereby can improve the responsiveness and the bandwidth of device greatly with prior art.
In addition, by adopting hot spot burnt technology far away to improve second order, the three rank indexs of device; Adopt the return loss index that the return loss of real-time monitoring device can control device.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a manufacture craft process flow diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of PD-WDM integrated optical device, can improve the optical responsivity of device and increase bandwidth, thereby improve the application of device.
In the prior art, because device adopts direct coupling system, so responsiveness is lower, and bandwidth can not improve, and the second order of device, three rank indexs are also relatively poor, have restricted the application of this class device greatly.Device major technique of the present utility model is to utilize GRIN Lens to realize the secondary coupling, thus responsiveness and bandwidth to improve device greatly; Adopt hot spot burnt technology far away, thereby can improve second order, the three rank indexs of device; Adopt the return loss of real-time monitoring device, thus return loss index that can control device.Therefore, by the technical scheme that the utility model provides, the performance index of this device have been improved greatly.
Introduce the technical solution of the utility model in detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model.
As shown in Figure 1, triband PD-WDM device of the present utility model comprises: WDM device (comprising double-fiber collimator, wavelength-division multiplex (WDM) optical filter), self-focusing coupled lens, photoelectric detector PD.
Double-fiber collimator is mainly used in light signal is played the multiplexing and collimation of wavelength-division; Need to prove, just illustrate with double-fiber collimator here, also can be other optical fiber collimators, or is substituted by other components and parts with collimated light beam effect.
Wavelength-division multiplex (WDM) optical filter that is to say a kind of wavelength selective filters, is mainly used in the light signal of choosing required wavelength, can select size 1.4mmx1.4mmx1.4mm deielectric-coating narrow-band interference filter plate or other filter plates etc.;
The self-focusing coupled lens is mainly used in light signal is carried out the secondary coupling; Utilize Modern Optics Technology to determine the GRIN Lens parameter, make the optical responsivity maximum of PD;
Photoelectric detector PD is mainly used in light signal is converted to electric signal.
Existing device generally is direct double-fiber collimator and the integrated encapsulation of PD, compare with existing device, the utility model is to have increased WDM optical filter and self-focusing coupled lens between double-fiber collimator and PD, with double-fiber collimator, wavelength-division multiplex (WDM) optical filter), self-focusing coupled lens, photoelectric detector PD be packaged together successively.
Technology of the present utility model is to utilize WDM to realize the wavelength-division multiplex of three kinds of wavelength, allow the ripple of 1550nm wavelength directly arrive PD by device, and the wave reflection of these two kinds of wavelength of 1310/1490nm is returned.
Concrete, principle of work of the present utility model is: (for example the combination of these light waves can be 1310/1490/1550nm to enter the ripple that closes of different wave length combination by an end of double-fiber collimator, can certainly be other wavelength), its medium wavelength be the light of X1 (in the combined wave length a kind of) through WDM filter plate and self-focusing coupled lens after, ejaculation enters into PD and produces photocurrent, and the light of its commplementary wave length reflects away from an other end of double-fiber collimator.
As shown in the figure, an end of input double-fiber collimator be the triband wavelength 1310/1490/1550nm that selectes, be the 1550nm wavelength and forward transfers out from PD, the wavelength that an other end of double-fiber collimator reflects away is 1310/1490nm.
And, adopt the self-focusing coupled lens to realize the hot spot that converges to PD being diminished the secondary coupling for the ripple of 1550nm, so just improved the optical responsivity of device.
When coupling, adopt burnt coupling technique far away simultaneously, can improve the bandwidth of device, improve second order, the three rank indexs of device.
Adopt on-line monitoring technology in addition, come On-line Control, can effectively improve the return loss and the channel isolation of device by the return loss and the channel isolation value of observation device.
Fig. 2 is a manufacture craft process flow diagram of the present utility model.
As shown in Figure 2, comprising:
201, make the WDM device;
At first, make the WDM device, the WDM device comprises double-fiber collimator and WDM optical filter.
This part mainly is to utilize the WDM technology of existing maturation, and selected triband (1310/1490/1550nm) is carried out the WDM element manufacturing.
202, preset PD;
Secondly, be preset PD.This step comprises that selecting GRIN Lens carries out the secondary coupling.This step can utilize existing Modern Optics Technology to determine the GRIN Lens parameter, guarantees that both are in optimum Working.
203, WDM device and PD are debugged;
This step is debugged WDM device and PD, makes the optical responsivity maximum of PD.At this moment, need to adopt existing hot spot burnt technology far away, monitor the return loss of device simultaneously, according to circumstances adjust, make the index optimization of device.
204, be encapsulated as the integrated form device.
At last, adopt the encapsulation of existing laser welding technology realization, thereby obtain the PD-WDM integrated optical device device.
PD-WDM integrated optical device of the present utility model has tangible advantage, and performance index improve greatly, are mainly reflected in:
PD reaches more than the 0.95mA/mW the 1550nm wavelength response degree of forward transmission, far above the 0.75mA/mW or the 0.85mA/mW of existing device; Return loss is not less than 45dB; Reflection channel wavelength 1310/1490nm is not less than 20dB to the isolation of transmission channels 1550nm wavelength; Bandwidth of a device can reach 4G, far above the 2.5G bandwidth of at present existing device.Specifically can see table:
| Performance index | The utility model device | Existing device |
| Optical responsivity | Greater than 0.95mA/mW | 0.75mA/m or 0.85mA/mW |
| Bandwidth | Greater than 4G | 2.5G |
| With the ripple loss | Be not less than 45dB | 40dB |
| Channel isolation | Be not less than 20dB | 18dB |
Can find that by foregoing the PD-WDM integrated optical device that the utility model provides is on existing device basis, adopt GRIN Lens to carry out the secondary coupling, improve the optical responsivity and the bandwidth of device greatly; Adopt hot spot burnt technology far away, improved second order, the three rank indexs of device greatly.Therefore, the PD-WDM integrated optical device that provides of the utility model has very strong actual application value.
More than a kind of PD-WDM integrated optical device that the utility model embodiment is provided be described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. PD-WDM integrated optical device is characterized in that:
Comprise the collimating apparatus, wave division multiplexing WDM optical filter, self-focusing coupled lens, the photoelectric detector PD that connect successively;
Described collimating apparatus is used for the light signal that the different wave length of importing makes up is played the multiplexing and collimation of wavelength-division;
Described WDM optical filter is used to choose the light signal of required wavelength;
Described self-focusing coupled lens is used for the light signal of input is carried out the secondary coupling, and the hot spot that converges to PD is diminished;
Photoelectric detector PD, the light signal that is used for carrying out through described self-focusing coupled lens after secondary is coupled is converted to electric signal.
2. PD-WDM integrated optical device according to claim 1 is characterized in that:
Described collimating apparatus is a double-fiber collimator.
3. PD-WDM integrated optical device according to claim 1 and 2 is characterized in that:
The wavelength of the light signal of the different wave length combination of importing in the described collimating apparatus is 1310/1490/1550nm, the wavelength of the light signal that is reflected away by the other end of collimating apparatus is 1310/1490nm, and the wavelength of handling the light signal of back input photoelectric detector PD through described WDM optical filter and described self-focusing coupled lens is 1550nm.
4. PD-WDM integrated optical device according to claim 1 and 2 is characterized in that:
Described WDM optical filter is a deielectric-coating narrow-band interference filter plate.
5. PD-WDM integrated optical device according to claim 1 and 2 is characterized in that:
The described collimating apparatus that connects successively, wave division multiplexing WDM optical filter, self-focusing coupled lens, photoelectric detector PD adopt laser welding technology to realize encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202792873U CN201867513U (en) | 2010-08-02 | 2010-08-02 | PD-WDM (photodetector-wavelength division multiplex) integrated optical device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202792873U CN201867513U (en) | 2010-08-02 | 2010-08-02 | PD-WDM (photodetector-wavelength division multiplex) integrated optical device |
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| CN201867513U true CN201867513U (en) | 2011-06-15 |
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| CN2010202792873U Expired - Fee Related CN201867513U (en) | 2010-08-02 | 2010-08-02 | PD-WDM (photodetector-wavelength division multiplex) integrated optical device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281151A (en) * | 2013-05-24 | 2013-09-04 | 青岛海信宽带多媒体技术有限公司 | Wavelength division multiplexing-based photoelectric device |
| CN113311543A (en) * | 2021-06-03 | 2021-08-27 | 四川天邑康和通信股份有限公司 | Novel coarse wavelength division multiplexer assembly |
-
2010
- 2010-08-02 CN CN2010202792873U patent/CN201867513U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281151A (en) * | 2013-05-24 | 2013-09-04 | 青岛海信宽带多媒体技术有限公司 | Wavelength division multiplexing-based photoelectric device |
| CN103281151B (en) * | 2013-05-24 | 2016-04-06 | 青岛海信宽带多媒体技术有限公司 | Based on the electrooptical device of wavelength division multiplexing |
| CN113311543A (en) * | 2021-06-03 | 2021-08-27 | 四川天邑康和通信股份有限公司 | Novel coarse wavelength division multiplexer assembly |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20120802 |