CN204065484U - The BOSA structure of a kind of built-in PWDM - Google Patents
The BOSA structure of a kind of built-in PWDM Download PDFInfo
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- CN204065484U CN204065484U CN201420571134.4U CN201420571134U CN204065484U CN 204065484 U CN204065484 U CN 204065484U CN 201420571134 U CN201420571134 U CN 201420571134U CN 204065484 U CN204065484 U CN 204065484U
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Abstract
The utility model relates to optical-fibre communications field, discloses the BOSA structure of a kind of built-in PWDM for unification of three nets, comprises light-receiving and transmitter unit, PWDM unit and coupling unit; Described PWDM unit comprises the double optical fiber head and self-focus lens that arrange according to light path, and described self-focus lens outgoing end face plating WDM film, this WDM film is high anti-to the following flashlight of λ wavelength, anti-reflection to the above flashlight of λ wavelength.PWDM is exported light shaping by a condenser lens and is coupled in BOSA by this utility model, the receiving end of the common globe lens of band and transmitting terminal can be combined with PWDM, directly PWDM is built in BOSA, be packaged in a body, achieve the miniaturization of product, eliminate middle connecting fiber simultaneously, substantially increase product reliability, and compact conformation, cost are low.
Description
Technical field
The utility model relates to optical-fibre communications field, particularly relates to the BOSA structure of a kind of built-in PWDM for unification of three nets.
Background technology
Along with the application of fiber optic network is more and more universal, especially be the digital transmission network of representative with telecommunications network and take cable television network as the fusion application of analog signal transmission network of representative, the propelling of country's unification of three nets project, the transceiving device demand of launching for four wavelength reception gets more and more.Wherein 1310nm, 1490nm are the standard wavelengths of digital transport network, and 1550nm, 1610nm are the standard wavelengths of analog transmission net.Four wavelength light emissions receiving units are in the market all realize with the combination of PWDM tail optical fiber and BOSA.
The PWDM light transceiver module of most basic structure generally by the two BOSA of the output optical fibre welding one of a PWDM, as shown in Figure 1.Wherein, PWDM 100 structure as shown in Figure 2, comprises double optical fiber head 110, first self-focus lens 120, WDM filter plate 130, second self-focus lens 140 and the single fiber head 150 that arrange according to light path.Four wavelength channels enter PWDM 100 optical module by the input-output optical fiber 111 of double optical fiber head 110, directional light is become to export through the first self-focus lens 120 collimating and correcting, the directional light exported is after WDM filter plate 130, the light of 1310nm, 1490nm wavelength is reflected back, through the light of 1550nm, 1610nm wavelength.The 1310/1490nm light of reflection converges to another optical fiber of double optical fiber head 110 through the first self-focus lens 120, and output optical fibre exports 112; The 1550/1610nm light appeared converges to single fiber head 150 through the second self-focus lens 140, and the optical fiber through single fiber head 150 exports; The optical fiber of this single fiber head 150 and light-receiving and transmitter unit 300(BOSA) input optical fibre welding, the 1550/1610nm light exported through this single fiber head 150 optical fiber enters the receiving end 301 of light-receiving and transmitter unit 300 through welding optic fibre 200.The transmitting terminal 302 of BOSA launches the light of 1610nm, the single fiber head 150 of PWDM 100 is entered via welding optic fibre 200, after through second self-focus lens 140 collimate export, and transmitted through WDM filter plate 130, enter the first self-focus lens 120, converge in double optical fiber head 110 through the first self-focus lens 120, exported by the input-output optical fiber 111 of double optical fiber head 110.
In traditional architectures, PWDM and BOSA two assembly is all form complete assemblies by welding optic fibre again after assembling separately.Or first assemble PWDM, then complete follow-up BOSA assembling with the optical fiber of its single fiber head.PWDM and BOSA is linked together by welding optic fibre.Bulky, and welding optic fibre easily bends fracture, causes whole product failure.
Summary of the invention
For overcoming the problems referred to above, the utility model proposes the BOSA structure of a kind of built-in PWDM, can be used as field miniaturization four wavelength reception emitting module as medium in CHINA RFTCOM Co Ltd unification of three nets, improve product reliability, and compact conformation, cost being low.
For achieving the above object, the technical scheme that the utility model proposes is: the BOSA structure of a kind of built-in PWDM, comprises light-receiving and transmitter unit, PWDM unit and coupling unit; Described PWDM unit comprises the double optical fiber head and self-focus lens that arrange according to light path, described self-focus lens outgoing end face plating WDM film, and this WDM film is high anti-to the following flashlight of λ wavelength, anti-reflection to the above flashlight of λ wavelength; Flashlight inputs through the input-output optical fiber of double optical fiber head, to be collimated by self-focus lens and after the WDM membrane filtration ripple of its outgoing end face, flashlight transmission more than λ wavelength is also coupled to the receiving end of light-receiving and transmitter unit by coupling unit, the flashlight below λ wavelength is exported by the output optical fibre through double optical fiber head after the reflection of WDM film; After the light signal that the transmitting terminal of light-receiving and transmitter unit sends enters self-focus lens transmitted through WDM film after coupling unit, the input-output optical fiber through double optical fiber head exports.
Further, described coupling unit is a condenser lens.
Further, described condenser lens is a plano-concave lens, and the directional light that self-focus lens exports is shaped as diverging light.
Further, the angle of divergence of described diverging light is 15 ° ± 1 °.
Further, described condenser lens is adhered to self-focus lens and is coated with on the outgoing end face of WDM film.
Further, described light-receiving and transmitter unit comprise receiving end, transmitting terminal, 45 ° of filter plates and 0 ° of filter plate; Transmitted through 0 ° of filter plate after PWDM element coupling to be reflected to the flashlight of light-receiving and transmitter unit by 45 ° of filter plates, enter the receiving end of light-receiving and transmitter unit; The flashlight that transmitting terminal is launched directly is coupled to PWDM unit transmitted through after 45 ° of filter plates by coupling unit.
Further, described receiving end is a photodetector; Described transmitting terminal is a laser diode.
Further, the end face that described self-focus lens is relative with double optical fiber head is the oblique 8 ° of inclined-planes be parallel to each other with double optical fiber head end face.
Further, the preferred 1500nm of described λ wavelength.
The beneficial effects of the utility model: PWDM is exported light shaping by a condenser lens and is coupled in BOSA by the utility model, directly PWDM is built in BOSA, is packaged in a body, achieves the miniaturization of product, substantially increase product reliability, and compact conformation, cost are low.
Accompanying drawing explanation
Fig. 1 is the BOSA structural representation of conventional belt PWDM;
Fig. 2 is PWDM structural principle schematic diagram in traditional structure;
Fig. 3 is the BOSA constructive embodiment schematic diagram of the new built-in PWDM of this practicality.
Reference numeral: 100, PWDM; 110, double optical fiber head; 111, input-output optical fiber; 112, output optical fibre; 120, the first self-focus lens; 130, WDM filter plate; 140, the second self-focus lens; 150, single fiber head; 160, self-focus lens; 170, WDM film; 200, welding optic fibre; 300, light-receiving and transmitter unit; 301, receiving end; 302, transmitting terminal; 303,45 ° of filter plates; 304,0 ° of filter plate; 400, condenser lens.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
The utility model is used for CHINA RFTCOM Co Ltd unification of three nets miniaturization four wavelength reception emitting module, by a condenser lens, PWDM being exported light shaping is coupled in BOSA, the receiving end of the common globe lens of band and transmitting terminal can be combined with PWDM, directly PWDM is built in BOSA, be packaged in a body, achieve the miniaturization of product, eliminate middle connecting fiber simultaneously, substantially increase product reliability, and compact conformation, cost are low.Concrete, the BOSA structure of this built-in PWDM, comprises light-receiving and transmitter unit, PWDM unit and coupling unit.Wherein, PWDM unit comprises the double optical fiber head and self-focus lens that arrange according to light path, and this self-focus lens outgoing end face plating WDM film, this WDM film is high anti-to the following flashlight of λ wavelength, anti-reflection to the above flashlight of λ wavelength.Flashlight inputs through the input-output optical fiber of double optical fiber head, to be collimated by self-focus lens and after the WDM membrane filtration ripple of its outgoing end face, flashlight transmission more than λ wavelength is also coupled to the receiving end of light-receiving and transmitter unit by coupling unit, the flashlight below λ wavelength is exported by the output optical fibre through double optical fiber head after the reflection of WDM film; After the light signal that the transmitting terminal of light-receiving and transmitter unit sends enters self-focus lens transmitted through WDM film after coupling unit, the input-output optical fiber through double optical fiber head exports.
Embodiment as shown in Figure 3, for four wavelength signals in broadcasting and TV unification of three nets, input optical signal comprises the three wavelength signals light of 1310/1490/1550nm, and transmitting terminal 302 launches the wavelength light of 1610nm.Wherein, the WDM film 170 of self-focus lens 160 outgoing end face plating, the wavelength light of λ=below 1500nm is reflected, to the wavelength light transmission of λ=more than 1500nm, what coupling unit adopted is a condenser lens 400, preferred employing one plano-concave lens, the directional light that self-focus lens 160 exports can be shaped as the diverging light of emission angle in 15 ° ± 1 °, be preferred if the angle of divergence is about 15 °.The light-receiving adopted in this embodiment and transmitter unit 300 comprise receiving end 301, transmitting terminal 302,45 ° of filter plates 303 and 0 ° of filter plate 304; Wherein, the 303 pairs of 1550nm wavelength light reflections of 45 ° of filter plates, to the transmission of 1610nm wavelength light, 0 ° of filter plate 304 is then placed between 45 ° of filter plates 303 and receiving end 301, it is the narrow band filter slice of a 1550nm, only allow the wavelength light through 1550nm ± 15nm, all the other wavelength light are all intercepted.
Flashlight containing 1310/1490/1550nm tri-wavelength inputs through the input-output optical fiber 111 of double optical fiber head 110, to be collimated by self-focus lens 160 and through WDM film 170 filtering of its outgoing end face, the flashlight of reflection 1310nm and 1490nm, the flashlight of transmission 1550nm.After the flashlight of 1310nm and 1490nm is reflected by this WDM film 170, assembled by self-focus lens 160 and be coupled to double optical fiber head 110, by another optical fiber of double optical fiber head 110, output optical fibre 112 outputs to other digital network systems.The flashlight of 1550nm is then transmitted through this WDM film 170, and be shaped as the angle of divergence at the utilizing emitted light of about 15 ° by the plano-concave lens as condenser lens 400, incide light-receiving and transmitter unit 300, after 45 ° of filter plates 303 of light-receiving and transmitter unit 300 reflect, again transmitted through 0 ° of filter plate 304, receiving end 301 receives and converts electric signal to and is employed system identification.The 1610nm flashlight that transmitting terminal 302 is launched, directly transmitted through 45 ° of filter plates 303, collimated light beam is shaped as again by condenser lens 400, self-focus lens 160 is entered through WDM film 170, focus on through self-focus lens 160 and be coupled to double optical fiber head 110, exported by the input-output optical fiber 111 of double optical fiber head 110.
In above-described embodiment, by end face relative with double optical fiber head for self-focus lens, the oblique 8 ° of inclined-planes be parallel to each other with double optical fiber head end face can be set to, reduce return loss.Condenser lens directly can be adhered to self-focus lens and be coated with on the outgoing end face of WDM film.What the receiving end in light-receiving and transmitter unit adopted is a photodetector, and what transmitting terminal adopted is a laser diode.
In the above-described embodiments, the Transflective wavelength coverage of WDM diaphragm, 45 ° of filter plates and 0 ° of filter plate is adjusted accordingly, namely can be applicable in other occasions.
Although specifically show in conjunction with preferred embodiment and describe the utility model; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; in the form and details to the various changes that the utility model is made, be protection domain of the present utility model.
Claims (9)
1. the BOSA structure of a built-in PWDM, comprise light-receiving and transmitter unit, PWDM unit and coupling unit, it is characterized in that: described PWDM unit comprises the double optical fiber head and self-focus lens that arrange according to light path, described self-focus lens outgoing end face plating WDM film, this WDM film is high anti-to the following flashlight of λ wavelength, anti-reflection to the above flashlight of λ wavelength; Flashlight inputs through the input-output optical fiber of double optical fiber head, to be collimated by self-focus lens and after the WDM membrane filtration ripple of its outgoing end face, flashlight transmission more than λ wavelength is also coupled to the receiving end of light-receiving and transmitter unit by coupling unit, the flashlight below λ wavelength is exported by the output optical fibre through double optical fiber head after the reflection of WDM film; After the light signal that the transmitting terminal of light-receiving and transmitter unit sends enters self-focus lens transmitted through WDM film after coupling unit, the input-output optical fiber through double optical fiber head exports.
2. the BOSA structure of built-in PWDM as claimed in claim 1, is characterized in that: described coupling unit is a condenser lens.
3. the BOSA structure of built-in PWDM as claimed in claim 2, is characterized in that: described condenser lens is a plano-concave lens, and the directional light that self-focus lens exports is shaped as diverging light.
4. the BOSA structure of built-in PWDM as claimed in claim 3, is characterized in that: the angle of divergence of described diverging light is 15 ° ± 1 °.
5. the BOSA structure of built-in PWDM as described in any one of claim 2-4, is characterized in that: described condenser lens is adhered to self-focus lens and is coated with on the outgoing end face of WDM film.
6. the BOSA structure of built-in PWDM as claimed in claim 1, is characterized in that: described light-receiving and transmitter unit comprise receiving end, transmitting terminal, 45 ° of filter plates and 0 ° of filter plate; Transmitted through 0 ° of filter plate after PWDM element coupling to be reflected to the flashlight of light-receiving and transmitter unit by 45 ° of filter plates, enter the receiving end of light-receiving and transmitter unit; The flashlight that transmitting terminal is launched directly is coupled to PWDM unit transmitted through after 45 ° of filter plates by coupling unit.
7. the BOSA structure of built-in PWDM as claimed in claim 6, is characterized in that: described receiving end is a photodetector; Described transmitting terminal is a laser diode.
8. the BOSA structure of built-in PWDM as claimed in claim 1, it is characterized in that: the end face that described self-focus lens is relative with double optical fiber head, is the oblique 8 ° of inclined-planes be parallel to each other with double optical fiber head end face.
9. the BOSA structure of built-in PWDM as claimed in claim 1, is characterized in that: described λ wavelength is 1500nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571134.4U CN204065484U (en) | 2014-09-30 | 2014-09-30 | The BOSA structure of a kind of built-in PWDM |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420571134.4U CN204065484U (en) | 2014-09-30 | 2014-09-30 | The BOSA structure of a kind of built-in PWDM |
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| CN204065484U true CN204065484U (en) | 2014-12-31 |
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| CN201420571134.4U Expired - Fee Related CN204065484U (en) | 2014-09-30 | 2014-09-30 | The BOSA structure of a kind of built-in PWDM |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917523A (en) * | 2019-04-30 | 2019-06-21 | 武汉兴思为光电科技有限公司 | A kind of wavelength interval is less than the 50G simplex optical module of 20nm |
-
2014
- 2014-09-30 CN CN201420571134.4U patent/CN204065484U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917523A (en) * | 2019-04-30 | 2019-06-21 | 武汉兴思为光电科技有限公司 | A kind of wavelength interval is less than the 50G simplex optical module of 20nm |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20190930 |