CN213338123U - Single-fiber bidirectional optical module - Google Patents
Single-fiber bidirectional optical module Download PDFInfo
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- CN213338123U CN213338123U CN202022819373.5U CN202022819373U CN213338123U CN 213338123 U CN213338123 U CN 213338123U CN 202022819373 U CN202022819373 U CN 202022819373U CN 213338123 U CN213338123 U CN 213338123U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 38
- 239000000835 fiber Substances 0.000 title claims abstract description 23
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 21
- 230000010287 polarization Effects 0.000 claims abstract description 36
- 239000013307 optical fiber Substances 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007175 bidirectional communication Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a single-fiber bidirectional optical module, which comprises an optical fiber input/output end, a light splitting component, a laser driver, a light beam adjusting module, a detector and a microcontroller; the laser driver and the detector are respectively electrically connected with the microcontroller; the laser is electrically connected with the laser driver; the light beam adjusting module is positioned between the light splitting assembly and the laser; the light splitting component comprises a Faraday rotator and an analyzing and polarizing filter; the downlink wavelength optical signal entering the input end and the output end of the optical fiber is focused on the detector after being reflected by the polarization analyzing filter; after an uplink wavelength optical signal emitted by the laser passes through the light beam adjusting module and the Faraday rotator, the polarization state direction of the uplink wavelength optical signal is consistent with the polarization detection direction of the polarization detection filter and is coupled into the optical fiber input and output end through the polarization detection filter. By adopting the single-fiber bidirectional optical module, the light beam quality is improved through the light beam adjusting module.
Description
Technical Field
The utility model relates to an optical module technical field, in particular to two-way optical module of single fiber.
Background
The single-fiber bidirectional mode means that optical signals in two directions can be transmitted and received simultaneously in one optical fiber. Conventional fiber optic transmission is single fiber, unidirectional, such that two fibers are required to achieve bidirectional communication. Compared with the prior art, the single-fiber bidirectional technology only uses one optical fiber to complete the work which can be completed by two optical fibers, and the transmission quantity of the existing optical fiber is doubled, thereby greatly saving the optical fiber resource. The single-fiber bidirectional optical module adopts the Wavelength Division Multiplexing (WDM) technology inside, so that the transmitting and receiving of optical signals can be realized by only using one optical fiber, and the number of the optical fibers is saved.
At present, the type of the bidirectional optical module on the market still cannot meet the market demand, so that diversified bidirectional optical modules need to be researched.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the background technology, the utility model provides a single-fiber bidirectional optical module, which comprises an optical fiber input and output end, a light splitting component, a laser driver, a light beam adjusting module, a detector and a microcontroller;
the laser driver and the detector are respectively electrically connected with the microcontroller;
the laser is electrically connected with the laser driver;
the light beam adjusting module is positioned between the light splitting assembly and the laser;
the light splitting component comprises a Faraday rotator and an analyzing and polarizing filter;
the downlink wavelength optical signal entering the input end and the output end of the optical fiber is focused on the detector after being reflected by the polarization analyzing filter;
after an uplink wavelength optical signal emitted by the laser passes through the light beam adjusting module and the Faraday rotator, the polarization state direction of the uplink wavelength optical signal is consistent with the polarization detection direction of the polarization detection filter and is coupled into the optical fiber input and output end through the polarization detection filter.
When the above embodiment is implemented, further, the light beam adjusting module includes a focusing lens and a collimating lens, which are sequentially disposed; each end face of the focusing lens is plated with a transmission film so as to focus light beams; and each end face of the collimating lens is plated with a transmission film so as to collimate the focused light beam.
In practicing the above embodiments, further, it employs SPF + encapsulation.
When the embodiment is implemented, further, the surface of the polarization analyzing filter is alternately coated with a film layer with a first refractive index and a film layer with a second refractive index; the first refractive index is greater than the second refractive index.
In the implementation of the above embodiment, further, the analyzer filter is tilted by 45 °.
In the single-fiber bidirectional optical module provided by the utility model, the size of the light beam emitted by the laser 30 is adjusted by the light beam adjusting module 50, so that the quality of the light beam is improved; in addition, adopt Faraday rotator and polarization detection filter, the light that allows the laser instrument transmission is penetrated into optic fibre input-output end and is transmitted, and to the random reverberation of polarization state that comes back from optic fibre input-output end's fiber end face and the inside reflection of optic fibre, only allow the light that is unanimous with polarization detection filter's polarization detection direction to penetrate Faraday rotator through polarization detection filter, the energy of reverberation is weakened by a wide margin, and penetrate Faraday rotator's light rotatory back, its polarization direction is perpendicular with the polarization direction of the polarized light of laser instrument transmission, can not influence the normal work of laser instrument, the dual function of beam splitting with the isolation has been realized promptly, the light path of single-fiber bidirectional optical subassembly has been simplified, material cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a single-fiber bidirectional optical module provided by the present invention.
Reference numerals: 10. an optical fiber input and output end; 20. a light splitting component; 21. a Faraday rotator; 22. a polarization detection filter; 30. a laser; 40. a laser driver; 50. a beam conditioning module; 51. a focusing lens; 52. a collimating lens; 60. a detector; 70. a microcontroller.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a single-fiber bidirectional optical module provided by the present invention, as shown in fig. 1, the present invention provides a single-fiber bidirectional optical module, which includes an optical fiber input/output end 10, a light splitting component 20, a laser 30, a laser driver 40, a light beam adjusting module 50, a detector 60, and a microcontroller 70;
the laser driver 40 and the detector 60 are electrically connected to the microcontroller 70 respectively;
the laser 30 is electrically connected with the laser driver 40;
the beam conditioning module 50 is located between the light splitting assembly 20 and the laser 30;
the light splitting component 20 comprises a Faraday rotator 21 and an analyzing and polarizing filter 22;
the downstream wavelength optical signal entering the optical fiber input/output end 10 is reflected by the analyzer 22 and then focused on the detector 60;
after the uplink wavelength optical signal emitted by the laser 30 passes through the light beam adjusting module 50 and is rotated by the faraday rotator 21, the polarization direction of the uplink wavelength optical signal is consistent with the polarization detection direction of the polarization detection filter 22, and the uplink wavelength optical signal is coupled into the optical fiber input and output end 10 through the polarization detection filter 22.
In implementing the above embodiment, further, the beam adjusting module 50 includes a focusing lens 51 and a collimating lens 52 arranged in sequence; each end face of the focusing lens 51 is plated with a transmission film to focus light beams; each end face of the collimating lens 52 is coated with a transmission film to collimate the focused light beam.
In specific implementation, the laser driver 40 and the detector 60 are respectively connected to pins of a microcontroller 70 (MCU); the microcontroller 70 controls the laser driver 40 to drive the laser 30 to work, and sends an optical signal to the optical fiber input/output end 10; the downstream wavelength optical signal entering the optical fiber input/output end 10 is reflected by the analyzer 22 and then focused on the detector 60, and the detector 60 converts the optical signal into an electrical signal and transmits the electrical signal to the microcontroller 70;
the size of the light beam emitted by the laser 30 is adjusted by the light beam adjusting module 50, so that the quality of the light beam is improved;
the light splitting component 20 adopts the Faraday rotator 21 and the polarization detection filter 22, light emitted by the laser 30 is allowed to enter the optical fiber input and output end 10 for transmission, and only light with the polarization detection direction consistent with that of the polarization detection filter 22 is allowed to enter the Faraday rotator 21 through the polarization detection filter 22 for reflected light with random polarization state reflected from the optical fiber end surface of the optical fiber input and output end 10 and the inside of an optical fiber, the energy of the reflected light is greatly weakened, and after the light entering the Faraday rotator 21 is rotated, the polarization state direction of the light is perpendicular to that of the polarized light emitted by the laser 30, so that the normal work of the laser 30 cannot be influenced, namely, the dual functions of light splitting and isolation are realized, the light path of a single-fiber bidirectional light component is simplified, and the material cost is reduced.
In practicing the above embodiments, further, it employs SPF + encapsulation.
In implementing the above embodiment, further, the surface of the analyzing and polarizing filter 22 is alternately coated with films with a first refractive index and films with a second refractive index; the first refractive index is greater than the second refractive index.
In implementing the above embodiment, further, the analyzer filter 22 is tilted at 45 °.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. A single-fiber bidirectional optical module is characterized in that: the device comprises an optical fiber input/output end, a light splitting component, a laser driver, a light beam adjusting module, a detector and a microcontroller;
the laser driver and the detector are respectively electrically connected with the microcontroller;
the laser is electrically connected with the laser driver;
the light beam adjusting module is positioned between the light splitting assembly and the laser;
the light splitting component comprises a Faraday rotator and an analyzing and polarizing filter;
the downlink wavelength optical signal entering the input end and the output end of the optical fiber is focused on the detector after being reflected by the polarization analyzing filter;
after an uplink wavelength optical signal emitted by the laser passes through the light beam adjusting module and the Faraday rotator, the polarization state direction of the uplink wavelength optical signal is consistent with the polarization detection direction of the polarization detection filter and is coupled into the optical fiber input and output end through the polarization detection filter.
2. The bidirectional optical transceiver of claim 1, wherein: the light beam adjusting module comprises a focusing lens and a collimating lens which are arranged in sequence; each end face of the focusing lens is plated with a transmission film so as to focus light beams; and each end face of the collimating lens is plated with a transmission film so as to collimate the focused light beam.
3. The bidirectional optical transceiver of claim 1, wherein: it is encapsulated with SPF +.
4. The bidirectional optical transceiver of claim 1, wherein: the surface of the polarization detection filter is alternately plated with film layers with a first refractive index and film layers with a second refractive index; the first refractive index is greater than the second refractive index.
5. The bidirectional optical transceiver of claim 1, wherein: the polarization detection filter is obliquely arranged at an angle of 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022819373.5U CN213338123U (en) | 2020-11-30 | 2020-11-30 | Single-fiber bidirectional optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022819373.5U CN213338123U (en) | 2020-11-30 | 2020-11-30 | Single-fiber bidirectional optical module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213338123U true CN213338123U (en) | 2021-06-01 |
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ID=76079112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022819373.5U Expired - Fee Related CN213338123U (en) | 2020-11-30 | 2020-11-30 | Single-fiber bidirectional optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213338123U (en) |
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2020
- 2020-11-30 CN CN202022819373.5U patent/CN213338123U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210601 |