CN211061792U - Four-wavelength light path structure based on optical filter - Google Patents
Four-wavelength light path structure based on optical filter Download PDFInfo
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- CN211061792U CN211061792U CN201922450446.5U CN201922450446U CN211061792U CN 211061792 U CN211061792 U CN 211061792U CN 201922450446 U CN201922450446 U CN 201922450446U CN 211061792 U CN211061792 U CN 211061792U
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Abstract
The utility model discloses a four wavelength light path structure based on light filter. The utility model discloses an overall dimension compact structure. The total reflection mirror, the first optical filter and the second optical filter are fixed together in advance, and the angle between the total reflection mirror, the first optical filter and the second optical filter can be guaranteed to be accurate. And after the optical components are fixed together, the optical components are assembled with the third optical filter in an integral mode, so that the assembly precision and the assembly efficiency of the final optical components are greatly improved. The compact structure of the light path greatly shortens the light path, and when the light path is assembled with a laser and a detector, a parallel light mode and a cone angle light mode can be used. Especially when the cone angle light mode is used, the high and low temperature stability of the whole light path is greatly improved, meanwhile, the existing mature industrial chain can be fully used, and the availability of matched materials is very high. Adopt the utility model discloses a light path structure can improve the output of light filter, and reduce cost is more accurate at beam split and the light combination in-process moreover.
Description
Technical Field
The utility model belongs to the technical field of signal transmission, concretely relates to four wavelength light path structures based on light filter.
Background
With the change of the information age, the requirement of upgrading and speeding up the Gpon network is brought by the broadband demand of hundreds of megabytes to gigabytes. The 10G PON technology becomes the optimal choice with its excellent bandwidth providing capability. The Combo PON technical scheme for fusion at the optical module level is the currently optimal technical implementation scheme.
The principle of Combo PON technical scheme is to simultaneously implement independent receiving and transmitting of 2.5G PON and 10G PON optical signals in one optical module, and to combine and demultiplex four different bearer wavelengths through a built-in WDM device, to provide 1 optical fiber interface externally, and to be compatible with existing 2.5G PON networks and 10G PON networks at the same time.
As shown in fig. 1, the core optical component optical engine of the Combo pon optical module is a 4-wavelength optical module, which respectively includes: a is a reflector with total reflection and reflection wavelength of 1260-1280 nm; b is a small-angle WDM light splitting sheet, the reflection wave band is 1260-1280 nm, and the transmission wave band is 1300-1580 nm; c is a 45-degree WDM light splitting sheet, the reflection wave band is 1300-1320 nm, and the transmission wave band is 1480-1580 nm; d is a 45-degree WDM light splitting sheet, the reflection wave band is 1480-1500 nm, and the transmission wave band is 1575-1580 nm; in addition, the system also comprises a 1577nm laser E, a 1490nm laser F, a 1270nm detector G and a 1310nm detector H, wherein the 1577nm laser and the 1270nm detector are used for realizing the transmission of 10G signals, namely, laser emitted by the 1577nm laser can be used as a carrier of information signals and can be transmitted through the 10G signals, the 1270nm detector can receive light emitted by optical fibers and can be used as a carrier of the information signals, the information signals can be transmitted through the 10G signals, and the 1490nm laser and the 1310nm detector are used for realizing the transmission of 2.5G signals.
As can be seen from fig. 1, the 1577nm laser emits laser with a wavelength of 1577nm, the 1490nm laser emits laser with a wavelength of 1490nm, which is emitted from the optical fiber port after passing through D, C, B, the laser is an information carrier, and therefore, information signal transmission can be performed, the optical fiber port can be connected to an optical fiber, the optical fiber can emit two lights carrying information signals, the two lights have wavelengths of 1270nm and 1310nm, respectively, the light with the wavelength of 1270nm is received by the 1270nm detector after being reflected by B and a, and the light with the wavelength of 1310nm is received by the 1310nm detector after being transmitted by B and reflected by C.
Therefore, the above-mentioned structure can be used for combining light (i.e. combining the 1490nm laser and 1577nm laser) and splitting light (i.e. separating the 1270nm light and the 1310nm light), the combining light can combine the two lights carrying two information signals and transmit the two lights through the optical fiber, and the splitting light can separate the lights carrying the two information signals and respectively receive the two lights through the two detectors; however, this structure has a drawback that the optical path is long. The three B/C/D filters are arranged in sequence in the horizontal direction, and the working distances of the three B/C/D filters and the distances among the optical fibers are very long. The whole optical path structure is long, and the temperature stability of the C/D channels is poor; the optical path is long, and an additional lens is required to be added in the optical path to change the optical path into collimated light so as to carry out optical coupling with signals of the last two paths of channels. The added lenses are customized optical elements, which are expensive and have poor availability. Most importantly, when the number of optical path elements is increased, the coupling efficiency of the last path of laser is low, the temperature stability is also deviated, and the use is finally influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems existing in the prior art, the present invention provides a four-wavelength optical path structure based on optical filters.
According to the utility model discloses an aspect provides a four wavelength light path structure based on light filter, including holophote, first light filter, second light filter and third light filter, the one end of holophote links to each other with the one end of first light filter, and the other end of first light filter links to each other with the one end of second light filter, and the third light filter is established in one side of second light filter, and holophote and first light filter mutually perpendicular, contained angle between second light filter and the first light filter are 45, and the second light filter is 55 ~ 80 with the contained angle of horizontal direction.
In some embodiments, the optical fiber further comprises a first laser, a second laser, a first detector, a second detector and an optical fiber port, wherein the first laser horizontally emits first laser, the first laser horizontally emits first laser after penetrating through one side of a third optical filter, the second laser emits second laser after reflecting through the other side of the third optical filter, the second laser horizontally emits second laser, the first laser and the second laser horizontally emit to one side of the second optical filter after being combined, the second laser horizontally emits to the optical fiber port after penetrating through the other side of the second optical filter, the optical fiber port is connected with an optical fiber, the optical fiber horizontally emits first light and second light, the first light and the second light emit to the second optical filter, the first light ray is reflected by the first optical filter and then emitted to the first detector, and the second light ray is transmitted by the first optical filter and then emitted to the second detector.
In some embodiments, the total internal reflection mirror reflects 1300-1320 nm, the first optical filter is a small angle WDM optical filter, transmits 1300-1320 nm, reflects 1260-1280 nm.
In some embodiments, the second filter is a small angle WDM filter, the transmission wavelength is 1480-1580 nm, and the reflection wavelength is 1260-1320 nm; the third optical filter is a 45-degree WDM optical filter, the transmission wavelength is 1575-1580 nm, and the reflection wavelength is 1480-1500 nm.
In some embodiments, the first laser has a wavelength of 1577nm and the second laser has a wavelength of 1490 nm.
In some embodiments, the first light has a wavelength of 1270nm and the second light has a wavelength of 1310 nm.
In some embodiments, the first laser and the first light transmit a 10G signal and the second laser and the second light transmit a 2.5G signal.
The utility model discloses an overall dimension compact structure. The total reflection mirror, the first optical filter and the second optical filter are fixed together in advance, and the angle between the total reflection mirror, the first optical filter and the second optical filter can be guaranteed to be accurate. And after the optical components are fixed together, the optical components are assembled with the third optical filter in an integral mode, so that the assembly precision and the assembly efficiency of the final optical components are greatly improved. The compact structure of the light path greatly shortens the light path, and when the light path is assembled with a laser and a detector, a parallel light mode and a cone angle light mode can be used. Especially when the cone angle light mode is used, the stability of the whole light path is greatly improved, the existing mature industrial chain can be fully used, and the availability of matched materials is very high. Adopt the utility model discloses a light path structure can improve the output of light filter, and reduce cost is more accurate at beam split and the light combination in-process moreover.
Drawings
FIG. 1 is a schematic diagram of a four-wavelength optical path structure in the prior art;
fig. 2 is a schematic diagram of a four-wavelength optical path structure based on an optical filter according to an embodiment of the present invention.
In the figure: 1-a total reflection mirror; 2-a first optical filter; 3-a second optical filter; 4-a third optical filter; 5-a first laser; 6-a second laser; 7-a first detector; 8-second detector.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Fig. 2 schematically shows a four-wavelength optical path structure based on optical filters according to an embodiment of the present invention.
As shown in fig. 2, a four-wavelength optical path structure based on optical filters includes a total reflection mirror 1, a first optical filter 2, a second optical filter 3, and a third optical filter 4. In addition, the four-wavelength optical path structure based on the optical filter further comprises a first laser 5, a second laser 6, a first detector 7, a second detector 8 and an optical fiber port. Of course, first laser 5, second laser 6, first detector 7, second detector 8 and fiber port also can do as the utility model discloses a four wavelength light path structure peripheral structure based on light filter.
As shown in fig. 2, the right lower end of the total reflection mirror 1 is connected to the left end of the first optical filter 2, the right upper end of the first optical filter 2 is connected to the upper end of the second optical filter 3, the third optical filter 4 is located on the right side of the second optical filter 3, the total reflection mirror 1 and the first optical filter 2 are perpendicular to each other (i.e., the reflection surface of the total reflection mirror 1 is perpendicular to the upper and lower planes of the first optical filter 2), the included angle between the second optical filter 3 and the first optical filter 2 is 45 °, the included angle between the upper and lower planes of the second optical filter 3 and the upper and lower planes of the first optical filter 2 is 45 °, the included angle between the second optical filter 3 and the horizontal direction is 55 ° to 80 °, and the upper plane and the lower plane of.
As shown in fig. 2, in this embodiment, the first laser 5 horizontally emits a first laser to the left and horizontally emits the first laser after penetrating through the third optical filter 4 to the left, the second laser 6 vertically emits a second laser and horizontally emits the second laser after reflecting on the left side of the third optical filter 4 to the left, and a point of incidence of the second laser coincides with a point of transmission of the first laser, so that the first laser and the second laser can be combined and then horizontally emits the second laser to the right side of the second optical filter 3 and horizontally emits the second laser from the left side of the second optical filter 3 to an optical fiber port, the optical fiber port is connected with an optical fiber, and both the first laser and the second laser can carry signal information, thereby completing transmission of the combined signal information; the optical fiber can horizontally emit a first light ray and a second light ray to the right, the first light ray and the second light ray both emit to the second optical filter 3, emit to the first optical filter 2 after being reflected by the second optical filter 3, emit to the first detector 7 after being reflected by the first optical filter 2, and emit to the second detector 8 after being transmitted by the first optical filter 2.
In the embodiment, the total reflection mirror 1 reflects a wavelength of 1300-1320 nm, the first optical filter 2 is a small angle WDM optical filter, and has a transmission wavelength of 1300-1320 nm and a reflection wavelength of 1260-1280 nm.
In the embodiment, the second optical filter 3 is a small-angle WDM optical filter, the transmission wavelength is 1480-1580 nm, and the reflection wavelength is 1260-1320 nm; the third optical filter 4 is a 45-degree WDM optical filter, the transmission wavelength is 1575-1580 nm, and the reflection wavelength is 1480-1500 nm.
In this embodiment, the wavelength of the first laser is 1577nm, and the wavelength of the second laser is 1490 nm.
In the present embodiment, the first light has a wavelength of 1270nm, and the second light has a wavelength of 1310 nm.
By limiting the wavelengths of the first laser light, the second laser light, the first light and the second light, and limiting the wavelengths that can be reflected and transmitted by the total reflection mirror 1, the first optical filter 2, the second optical filter 3 and the third optical filter 4, the first laser light, the second laser light, the first light and the second light can be reflected and transmitted in the above manner.
In this embodiment, the first laser and the first light may transmit a 10G signal, that is, the first laser and the first light may carry an information signal and transmit in a 10G signal manner, and the second laser and the second light may transmit a 2.5G signal, that is, the second laser and the second light may carry an information signal and transmit in a 2.5G signal manner.
The utility model discloses an overall dimension compact structure. The total reflection mirror 1, the first optical filter 2 and the second optical filter 3 are fixed together in advance, and the angle between the total reflection mirror 1 and the first optical filter can be guaranteed to be accurate. And after being fixed together, the optical component is assembled with the third optical filter 4 in an integral mode, so that the assembly precision and the assembly efficiency of the final optical component are greatly improved. The compact structure of the light path greatly shortens the light path, and when the light path is assembled with a laser and a detector, a parallel light mode and a cone angle light mode can be used. Especially when the cone angle light mode is used, the high and low temperature stability of the whole light path is greatly improved, meanwhile, the existing mature industrial chain can be fully used, and the availability of matched materials is very high. Adopt the utility model discloses a light path structure can reduce cost, and is more accurate at the beam split moreover with close the light in-process, can close two laser that carry different information signal, and two light that will carry two different information signal carry out the beam split, reach information signal transmission's purpose.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (7)
1. A four wavelength light path structure based on optical filter, its characterized in that: the optical filter comprises a total reflector (1), a first optical filter (2), a second optical filter (3) and a third optical filter (4), wherein one end of the total reflector (1) is connected with one end of the first optical filter (2), the other end of the first optical filter (2) is connected with one end of the second optical filter (3), the third optical filter (4) is arranged on one side of the second optical filter (3), the total reflector (1) and the first optical filter (2) are perpendicular to each other, an included angle between the second optical filter (3) and the first optical filter (2) is 45 degrees, and an included angle between the second optical filter (3) and the horizontal direction is 55-80 degrees.
2. The filter-based four-wavelength optical path structure of claim 1, wherein: the device comprises a first laser (5), a second laser (6), a first detector (7), a second detector (8) and an optical fiber port, wherein the first laser (5) horizontally emits first laser and horizontally emits the first laser after penetrating through a third optical filter (4), the second laser (6) emits second laser and horizontally emits the second laser after reflecting through the other side of the third optical filter (4), the first laser and the second laser are horizontally emitted to one side of the second optical filter (3) after being combined, the second laser horizontally emits the second laser to the optical fiber port after penetrating through the other side of the second optical filter (3), the optical fiber port is connected with an optical fiber, the optical fiber horizontally emits first light and second light, the first light and the second light emit to the second optical filter (3), the first light emits to the first optical filter (2) after reflecting through the second optical filter (3), and the first light emits to the first detector (7) after reflecting through the first optical filter (2), the second light rays are transmitted by the first optical filter (2) and then emitted to the second detector (8).
3. The filter-based four-wavelength optical path structure of claim 2, wherein: the total reflection mirror (1) reflects the wavelength of 1300-1320 nm, the first optical filter (2) is a small-angle WDM optical filter, the transmission wavelength of 1300-1320 nm and the reflection wavelength of 1260-1280 nm are achieved.
4. The filter-based four-wavelength optical path structure of claim 3, wherein: the second optical filter (3) is a small-angle WDM optical filter, the transmission wavelength is 1480-1580 nm, and the reflection wavelength is 1260-1320 nm; the third optical filter (4) is a 45-degree WDM optical filter, the transmission wavelength is 1575-1580 nm, and the reflection wavelength is 1480-1500 nm.
5. The filter-based four-wavelength optical path structure of claim 4, wherein: the wavelength of the first laser is 1577nm, and the wavelength of the second laser is 1490 nm.
6. The filter-based four-wavelength optical path structure of claim 5, wherein: the wavelength of the first light is 1270nm, and the wavelength of the second light is 1310 nm.
7. The filter-based four-wavelength optical path structure of claim 6, wherein: the first laser and the first light transmit 10G signals, and the second laser and the second light transmit 2.5G signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922450446.5U CN211061792U (en) | 2019-12-27 | 2019-12-27 | Four-wavelength light path structure based on optical filter |
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| CN201922450446.5U CN211061792U (en) | 2019-12-27 | 2019-12-27 | Four-wavelength light path structure based on optical filter |
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| CN211061792U true CN211061792U (en) | 2020-07-21 |
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