50GPON wavelength division multiplexing passive optical device

Abstract

The utility model relates to a 50GPON wavelength division multiplexing passive optical device, which comprises a first mounting surface, a second mounting surface, a third mounting surface, a fourth mounting surface, a fifth mounting surface and a fifth mounting surface, a first reflecting diaphragm, a second reflecting diaphragm and a first optical channel are arranged on the first mounting surface, and a first optical filter, a second optical filter and a second optical channel are arranged on the second mounting surface. A third optical filter, a fourth optical filter and a fifth optical filter are arranged on the third mounting surface, a first passage is reserved between the third optical filter and the fourth optical filter, a second passage is reserved between the fourth optical filter and the fifth optical filter, a third reflecting diaphragm is arranged on the fourth mounting surface, and a third optical channel, a fourth optical channel and a fifth optical channel are formed in the fifth mounting surface; the utility model has the advantages that the purpose of separating the short wavelength intervals is achieved by analyzing the wavelength intervals and adjusting the machining angle of the bracket and the placing sequence of the optical filters, and the device can adapt to various different application scenes, so that the insertion loss is reduced as much as possible under the condition that the isolation degree is met, and the applicability to subsequent matched tube shells is stronger.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of optical communication especially relates to a 50GPON wavelength division multiplexing passive optical device. BACKGROUND

[0002] With the development of access network, the network speed is constantly improved, and the development of passive optical network (PON) is also constantly upgraded. At present, 10G PON enters the large-scale deployment stage, and 50G PON standard is the only standard of the next generation PON after 10GPON, which can provide more than 5 times of access bandwidth and better service support capability (large bandwidth, low latency, high reliability) compared with 10G PON, and support the smooth evolution from GPON, 10G PON to 50G PON to be compatible with the existing ODN network as much as possible.

[0003] The current existing three-network compatible optical module (GPON OLT+XG(S)PON OLT+50G PON OLT) includes the following wavelengths, the transmission wavelength: 1577nm, 1490nm, 1342nm; the receiving wavelength: 1310nm, 1286nm, 1270nm. In order to better realize the filtering and reflection of optical signals, the current scheme adopts the scheme as shown in patent 202211614517.0 and as shown in patent 202211603330.0, which optimizes the arrangement mode of wavelength division multiplexer, adopts the wavelength division utilization scheme of two Z-BLOCK, and also adopts the coaxial TO scheme on the overall layout of cost and product design, so that the product performance is more reliable, the coaxial small size package can be applicable to QSFP and SFP module, and the optimized optical path design can meet better coupling efficiency index. But this kind of structure is not simple and efficient, the cost is very high, and the practicality is not strong. Figure 1 Figure 1 The current existing three-network compatible optical module (GPON OLT+XG(S)PON OLT+50G PON OLT) includes the following wavelengths, the transmission wavelength: 1577nm, 1490nm, 1342nm; the receiving wavelength: 1310nm, 1286nm, 1270nm. In order to better realize the filtering and reflection of optical signals, the current scheme adopts the scheme as shown in patent 202211614517.0 and as shown in patent 202211603330.0, which optimizes the arrangement mode of wavelength division multiplexer, adopts the wavelength division utilization scheme of two Z-BLOCK, and also adopts the coaxial TO scheme on the overall layout of cost and product design, so that the product performance is more reliable, the coaxial small size package can be applicable to QSFP and SFP module, and the optimized optical path design can meet better coupling efficiency index. But this kind of structure is not simple and efficient, the cost is very high, and the practicality is not strong.

[0004] Based on this, the case is proposed. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of 50GPON wavelength division multiplexing passive optical device, to further reduce the volume of wavelength division multiplexer, improve optical system efficiency and manufacturing efficiency.

[0006] In order to realize the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] ​A 50GPON wavelength division multiplexing passive optical device, comprising a carrier, the carrier comprising first to fifth mounting surfaces, a hollow space is provided in the carrier for an optical path to pass through; the first mounting surface is provided with a reflecting film piece one, a reflecting film piece two and an optical channel one, the second mounting surface is provided with a filter piece one, a filter piece two and an optical channel two, the third mounting surface is provided with a filter piece three, a filter piece four and a filter piece five, and a passageway one is reserved between the filter piece three and the filter piece four, and a passageway two is reserved between the filter piece four and the filter piece five, the fourth mounting surface is provided with a reflecting film piece three, and the fifth mounting surface is provided with an optical channel three, an optical channel four and an optical channel five.

[0008] The light entering from the optical channel one is transmitted through the filter piece three and reaches the filter piece one, the filter piece one transmits one of the lights and outputs, and reflects the remaining lights, the remaining lights pass through the passageway one and reach the reflecting film piece two, are reflected by the reflecting film piece two and reach the filter piece four, are transmitted through the filter piece four and reach the filter piece two, the filter piece two transmits one of the lights and outputs, and reflects the remaining lights, the remaining lights pass through the passageway two and reach the reflecting film piece one, are reflected by the reflecting film piece one and reach the filter piece five, are transmitted through the filter piece five and reach the optical channel two and output.

[0009] The light entering from the optical channel three is reflected by the reflecting film three and reaches the filter piece three, the filter piece three reflects the light to the optical channel one and outputs;

[0010] The light entering from the optical channel four is reflected by the reflecting film three and reaches the filter piece four, is reflected by the filter piece four and reaches the reflecting film piece two, passes through the passageway one and reaches the filter piece one after being reflected by the reflecting film piece two, the filter piece one reflects the light to the filter piece three, and the light is transmitted through the filter piece three and reaches the optical channel one and outputs.

[0011] The light entering from the optical channel five is reflected by the reflecting film three and reaches the filter piece five, is reflected by the filter piece five and reaches the reflecting film piece one, passes through the passageway two and reaches the filter piece two after being reflected by the reflecting film piece one, is reflected by the filter piece two and reaches the filter piece four, is transmitted through the filter piece four and reaches the reflecting film piece two, passes through the passageway one and reaches the filter piece one after being reflected by the reflecting film piece two, the filter piece one reflects the light to the filter piece three, and the light is transmitted through the filter piece three and reaches the optical channel one and outputs.

[0012] Further, the optical channel two is provided with a filter piece six for transmitting one of the lights reaching the optical channel two and outputting.

[0013] Further, the carrier comprises a female carrier and an embedded carrier, the first mounting surface and the second mounting surface are provided on the female carrier, and the female carrier is provided with a mounting groove for embedding the embedded carrier, and the third mounting surface, the fourth mounting surface and the fifth mounting surface are provided on the embedded carrier.

[0014] Further, define the angle between the plane where the filter one is located and the vertical plane as θ1, and define the angle between the plane where the filter one is located and the plane where the filter two is located as θ2, and θ1-θ2=8°.

[0015] Further, the reflective film three includes three independent reflective films, and the three reflective films correspond to the filter three, the filter four and the filter five respectively.

[0016] Further, the light channel one is used for incident light of wavelengths of 1310mm, 1286nm and 1270nm, and emits light of wavelengths of 1577nm, 1490nm and 1342nm.

[0017] The light channel three is used for incident light of wavelength of 1577nm.

[0018] The light channel four is used for incident light of wavelength of 1490nm.

[0019] The light channel three is used for incident light of wavelength of 1342nm.

[0020] The filter one transmits light of wavelength of 1310nm and reflects light of other wavelengths.

[0021] The filter two transmits light of wavelength of 1270nm and reflects light of other wavelengths.

[0022] The filter three reflects light of wavelength of 1577nm and transmits light of other wavelengths.

[0023] The filter four reflects light of wavelength of 1490nm and transmits light of other wavelengths.

[0024] The filter five reflects light of wavelength of 1342nm and transmits light of other wavelengths.

[0025] The filter six transmits light of wavelength of 1286nm and reflects light of other wavelengths.

[0026] Further, the carrier adopts a metal support.

[0027] The utility model discloses the advantages are:

[0028] 1. by analyzing each wavelength interval, the angle of carrier support machine processing and the filter placement order are adjusted, the purpose of short wavelength interval wave division is reached, can adapt to various different application scenes, makes it as far as possible reduce the insertion loss under the condition of meeting the isolation degree, and the applicability of the subsequent matching pipe shell is stronger, utilizes the design idea of the scheme, in the eight wavelength, ten wavelength etc.

[0029] 2. the wave division and the wave combination are integrated on a part on the structure, and the overall optical path occupied area is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A three-dimensional configuration diagram of the WDM passive optical device in the embodiment;

[0031] Figure 2 A three-dimensional configuration diagram of the WDM passive optical device in the embodiment from another perspective;

[0032] Figure 3 An internal perspective diagram of the WDM passive optical device in the embodiment;

[0033] Figure 4 A route diagram of λ1-λ3 in the WDM passive optical device in the embodiment;

[0034] Figure 5 A diagram of the WDM passive optical device in the embodiment when optical channel three, optical channel four, and optical channel five are incident with λ4, λ5, and λ6;

[0035] Figure 6 A route diagram of λ1-λ6 in the WDM passive optical device in the embodiment;

[0036] Figure 7 A route diagram of λ4-λ6 in the WDM passive optical device in the embodiment;

[0037] Figure 8 A position diagram of θ1 and θ2 in the embodiment;

[0038] Figure 9 A position diagram of θ4, θ5, θ6, θ7, θ8, and θ9 in the embodiment;

[0039] REFERENCE NUMERALS

[0040] 1, first mounting surface; 2, second mounting surface; 3, third mounting surface; 4, fourth mounting surface; 5, fifth mounting surface; 6, reflective film one; 7, reflective film two; 8, reflective film three; 9, passageway one; 10, passageway two; 11, filter one; 12, filter two; 13, filter three; 14, filter four; 15, filter five; 16, filter six; 17, female carrier; 18, embedded carrier; 19, optical channel one. DETAILED DESCRIPTION

[0041] The utility model will be described in further detail below in combination with the embodiments, and it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like in the text indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0042] The embodiment provides a 50GPON wavelength division multiplexing passive optical device, as shown in the drawing, comprising a carrier, wherein the carrier comprises a female carrier 17 and an embedded carrier 18, the female carrier 17 is provided with a first mounting surface 1 and a second mounting surface 2, and the female carrier 17 is provided with a mounting groove for embedding the embedded carrier 18, and the embedded carrier 18 is provided with a third mounting surface 3, a fourth mounting surface 4 and a fifth mounting surface 5. Figures 1 to 9 The embedded carrier 18 can double the application wavelength, and meanwhile, the angles of the carrier can be adjusted, so that the volume is reduced while the functions of wave division and wave combination are realized. In addition, a hollow space is arranged in the carrier for the light path to pass through.

[0043] The first mounting surface 1 and the second mounting surface 2 are arranged front to back, and the embedded carrier 18 is located between the first mounting surface 1 and the second mounting surface 2, and the third mounting surface 3 is located below the fourth mounting surface 4 and the fifth mounting surface 5. The first mounting surface 1 is provided with a reflecting film 1 6, a reflecting film 2 7 and a light channel 1 9. The second mounting surface 2 is provided with a filter 1 1, a filter 2 12 and a light channel 2. The third mounting surface 3 is provided with a filter 3 13, a filter 4 14 and a filter 5 15, and a passageway 1 9 is reserved between the filter 3 13 and the filter 4 14, and a passageway 2 10 is reserved between the filter 4 14 and the filter 5 15. The fourth mounting surface 4 is provided with a reflecting film 3 8, and the fifth mounting surface 5 is provided with a light channel 3, a light channel 4 and a light channel 5.

[0044] The existing three-network compatible optical module (GPON OLT+XG(S)PON OLT+50G PON OLT) comprises the following wavelengths, the transmitting wavelengths are 1577nm, 1490nm and 1342nm, and the receiving wavelengths are 1310nm, 1286nm and 1270nm. In the embodiment, λ1-λ3 are the receiving wavelengths, and are 1310mm (λ1), 1270nm (λ2) and 1286nm (λ3) respectively; and λ4-λ6 are the transmitting wavelengths, and are 1577nm (λ4), 1490nm (λ5) and 1342nm (λ6) respectively.

[0045] In this embodiment, the light channel one 19 is used for incident light of 1310mm, 1286nm, 1270nm wavelength, and the light of 1577nm, 1490nm, 1342nm wavelength is emitted; the light channel three is used for incident light of 1577nm wavelength; the light channel four is used for incident light of 1490nm wavelength; the light channel five is used for incident light of 1342nm wavelength; and the light channel two is used for emitting light of 1286nm wavelength.

[0046] The filter one 11 transmits light of 1310nm wavelength and reflects light of other wavelengths.

[0047] The filter two 12 transmits light of 1270nm wavelength and reflects light of other wavelengths.

[0048] The filter three 13 reflects light of 1577nm wavelength and transmits light of other wavelengths.

[0049] The filter four 14 reflects light of 1490nm wavelength and transmits light of other wavelengths.

[0050] The filter five 15 reflects light of 1342nm wavelength and transmits light of other wavelengths.

[0051] The reflecting film one 6, the reflecting film two 7 and the reflecting film three 8 can reflect all light.

[0052] As shown in Figure 4 and Figure 7 the working principle of the light path of this embodiment is as follows.

[0053] The working principle of λ1 light path is that the light of the light channel one 19 is incident, reaches the filter three 13, is transmitted by the filter three 13, reaches the filter one 11, is transmitted by the filter one 11, and is emitted.

[0054] The working principle of λ2 light path is that the light of the light channel one 19 is incident, reaches the filter three 13, is transmitted by the filter three 13, reaches the filter one 11, is reflected by the filter one 11, passes through the passage one 9, reaches the reflecting film two 7, is reflected by the reflecting film two 7, reaches the filter four 14, is transmitted by the filter four 14, reaches the filter two 12, is transmitted by the filter two 12, and is emitted.

[0055] The working principle of λ3 light path is that the light of the light channel one 19 is incident, reaches the filter three 13, is transmitted by the filter three 13, reaches the filter one 11, is reflected by the filter one 11, passes through the passage one 9, reaches the reflecting film two 7, is reflected by the reflecting film two 7, reaches the filter four 14, is transmitted by the filter four 14, reaches the filter two 12, is reflected by the filter two 12, passes through the passage two 10, reaches the reflecting film one 6, is reflected by the reflecting film one 6, reaches the filter five 15, is transmitted by the filter five 15, reaches the light channel two, and is emitted.

[0056] In theory, the light reaching the second light channel is only λ3, but inevitably, other stray light will also reach the second light channel, interfering with λ3. As preferred, the present embodiment installs filter six 16 at the second light channel, which transmits light of 1286 nm wavelength and reflects light of other wavelengths, so that stray light reaching the second light channel cannot exit, and only light of 1286 nm (λ3) wavelength can exit.

[0057] λ4 working light path principle: light enters the third light channel, is reflected by reflecting film three 8, reaches filter three 13, is reflected by filter three 13, reaches the first light channel 19, and exits.

[0058] λ5 working light path principle: light enters the fourth light channel, is reflected by reflecting film three 8, reaches filter four 14, is reflected by filter four 14, reaches reflecting film two 7, is reflected by reflecting film two 7, passes through passage one 9, reaches filter one 11, is reflected by filter one 11, reaches filter three 13, is transmitted by filter three 13, reaches the first light channel 19, and exits.

[0059] λ6 working light path principle: light enters the fifth light channel, is reflected by reflecting film three 8, reaches filter five 15, is reflected by filter five 15, reaches reflecting film one 6, is reflected by reflecting film one 6, passes through passage two 10, reaches filter two 12, is reflected by filter two 12 to filter four 14, is transmitted by filter four 14, reaches reflecting film two 7, is reflected by reflecting film two 7, passes through passage one 9, reaches filter one 11, is reflected by filter one 11 to filter three 13, is transmitted by filter three 13, reaches the first light channel 19, and exits.

[0060] The present embodiment is directed to two wavelengths of 50G PON 1286±2 nm and 1270±10 nm, and the wavelength interval is 4 nm. If the incident angle (the angle between the light path and the normal line of the filter) at filter two 12 does not meet the requirements, the wavelength interval of 4 nm cannot be filtered out, i.e., filter two will also transmit light of 1286±2 nm wavelength. As shown in FIG. 8, it is calculated that when the incident angle at filter two 12 is 8°, the wavelength interval of 4 nm can be filtered out, while the optical path is shortened and the insertion loss is reduced. Figure 4 As shown in FIG. 9, the angle between the plane where filter one 11 is located and the vertical plane is defined as θ1, and the angle between the plane where filter one 11 is located and the plane where filter two 12 is located is defined as θ2, and θ1-θ2=8°. By adjusting θ1 and θ2, the incident angle at filter two 12 can be ensured to be 8°. Figure 8 As shown in FIG. 10, the angle between the plane where filter one 11 is located and the vertical plane is defined as θ1, and the angle between the plane where filter one 11 is located and the plane where filter two 12 is located is defined as θ2, and θ1-θ2=8°. By adjusting θ1 and θ2, the incident angle at filter two 12 can be ensured to be 8°.

[0061] Figure 9 ​As shown in the figure, the reflective film three 8, the filter three 13, the filter four 14 and the filter five 15 are all placed at 45°, so as to ensure the light path with a wavelength interval of more than 40nm to be separated (the wavelength intervals of 1577nm, 1490nm and 1342nm are all more than 40nm). However, when the wavelength interval is less than 40nm, the placement angles of the reflective film three 8, the filter three 13, the filter four 14 and the filter five 15, i.e. the angle cooperation between the reflective film three 8 and the filter three 13, the angle cooperation between the reflective film three 8 and the filter four 14 and the angle cooperation between the reflective film three 8 and the filter five 15, need to be adjusted to ensure the effectiveness of the light separation. To ensure the convenience of the angle adjustment, the reflective film three 8 in the embodiment comprises three independent reflective films 8a, 8b and 8c. The placement angle of the reflective film 8a is defined as θ7, the placement angle of the reflective film 8b is defined as θ8, the placement angle of the reflective film 8c is defined as θ9, the placement angle of the filter three 13 is defined as θ4, the placement angle of the filter four 14 is defined as θ5 and the placement angle of the filter five 15 is defined as θ6. The angle cooperation between θ4 and θ7, the angle cooperation between θ5 and θ8 and the angle cooperation between θ6 and θ9 are adjusted to meet the wavelength interval of less than 40nm.

[0062] In addition, the carrier in the embodiment is in the form of a metal support, which replaces the existing glass block design structure, reduces the cost and improves the production efficiency.

[0063] The above embodiments are only used for explaining the concept of the utility model, and are not limited to the protection of the utility model. Any non-essential modification of the utility model based on the concept should fall within the protection scope of the utility model.

Claims

1. A 50 G PON WDM passive optical device comprising a carrier, characterized in that, The carrier comprises first to fifth installation surfaces, and a hollow space is arranged in the carrier for a light path to pass through; the first installation surface is provided with a reflecting film sheet one, a reflecting film sheet two and a light channel one, the second installation surface is provided with a filter sheet one, a filter sheet two and a light channel two, the third installation surface is provided with a filter sheet three, a filter sheet four and a filter sheet five, a passage one is reserved between the filter sheet three and the filter sheet four, a passage two is reserved between the filter sheet four and the filter sheet five, the fourth installation surface is provided with a reflecting film sheet three, and the fifth installation surface is provided with a light channel three, a light channel four and a light channel five; The light entering from the light channel one is transmitted by the filter sheet three and reaches the filter sheet one, the filter sheet one transmits one light path and outputs, and reflects the remaining light path, the remaining light path passes through the passage one and reaches the reflecting film sheet two, is reflected by the reflecting film sheet two and reaches the filter sheet four, is transmitted by the filter sheet four and reaches the filter sheet two, the filter sheet two transmits one light path and outputs, and reflects the remaining light path, the remaining light path passes through the passage two and reaches the reflecting film sheet one, is reflected by the reflecting film sheet one and reaches the filter sheet five, is transmitted by the filter sheet five and reaches the light channel two and is outputted; The light entering from the light channel three is reflected by the reflecting film three and reaches the filter sheet three, and the filter sheet three reflects the light to the light channel one and is outputted; The light entering from the light channel four is reflected by the reflecting film three and reaches the filter sheet four, is reflected by the filter sheet four and reaches the reflecting film sheet two, passes through the passage one and reaches the filter sheet one after being reflected by the reflecting film sheet two, and the filter sheet one reflects the light to the filter sheet three, and the light is transmitted by the filter sheet three and reaches the light channel one and is outputted; The light entering from the light channel five is reflected by the reflecting film three and reaches the filter sheet five, is reflected by the filter sheet five and reaches the reflecting film sheet one, passes through the passage two and reaches the filter sheet two after being reflected by the reflecting film sheet one, is reflected by the filter sheet two and reaches the filter sheet four, is transmitted by the filter sheet four and reaches the reflecting film sheet two, passes through the passage one and reaches the filter sheet one after being reflected by the reflecting film sheet two, and the filter sheet one reflects the light to the filter sheet three, and the light is transmitted by the filter sheet three and reaches the light channel one and is outputted.

2. A 50 G PON WDM passive optical device as claimed in claim 1, characterized in that, The filter sheet six is arranged at the light channel two and is used for transmitting one light path reaching the light channel two and outputting.

3. A 50 G PON WDM passive optical device as claimed in claim 1, characterized in that, The carrier comprises a female carrier and an embedded carrier, the first installation surface and the second installation surface are arranged on the female carrier, and the embedded carrier is embedded in the installation groove arranged on the female carrier, and the third installation surface, the fourth installation surface and the fifth installation surface are arranged on the embedded carrier.

4. A 50 G PON WDM passive optical device as claimed in claim 1, characterized in that, An angle between a plane where the filter sheet one is located and a vertical plane is defined as θ1, and an angle between the plane where the filter sheet one is located and a plane where the filter sheet two is located is defined as θ2, and θ1-θ2=8°.

5. A 50 G PON WDM passive optical device as claimed in claim 1, wherein, The reflecting film sheet three comprises three independent reflecting film sheets, and the three reflecting film sheets correspond to the filter sheet three, the filter sheet four and the filter sheet five respectively.

6. A 50 G PON WDM passive optical device as claimed in claim 2, characterized in that, The light channel one is used for inputting light with wavelengths of 1310 mm, 1286 nm and 1270 nm and outputting light with wavelengths of 1577 nm, 1490 nm and 1342 nm; The light channel three is used for inputting light with a wavelength of 1577 nm; The light channel four is used for inputting light with a wavelength of 1490 nm; The light channel three is used for inputting light with a wavelength of 1342 nm; The filter transmits light of a wavelength of 1310 nm and reflects light of the rest of wavelengths; The filter transmits light of a wavelength of 1270 nm and reflects light of the rest of wavelengths; The filter transmits light of a wavelength of 1577 nm and reflects light of the rest of wavelengths; The filter transmits light of a wavelength of 1490 nm and reflects light of the rest of wavelengths; The filter transmits light of a wavelength of 1342 nm and reflects light of the rest of wavelengths; The filter transmits light of a wavelength of 1286 nm and reflects light of the rest of wavelengths.

7. A 50 G PON WDM passive optical device as claimed in claim 1, wherein, the first and second 50 G PON WDM passive optical devices are arranged in a single housing, and the first and second 50 G PON WDM passive optical devices are arranged in a single housing. The carrier adopts a metal support.

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