A high-performance multi-channel wavelength division multiplexing / demultiplexing optical module

Abstract

The utility model relates to a kind of high-performance multi-channel wavelength division multiplexing demultiplexing optical module, including substrate, long-short wave filter, long wave filter group, short wave filter group, substrate and corner prism.The utility model structure design is reasonable, uses corner prism and long-short wave filter, compared with transmission cascade scheme to shorten nearly half of optical path, it is favorable to improve coupling efficiency;Reduce the number of reflection in channel, reduce the additional loss caused by processing engineering superposition, while effectively shorten the size of the module size of multi-channel multiplexing and demultiplexing.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, specifically to a high-performance multi-channel wavelength division multiplexing and demultiplexing optical module. Background Technology

[0002] With the rapid increase in human demand for communication bandwidth, existing communication systems face two major challenges: capacity and energy consumption. To provide greater bandwidth with a smaller footprint and lower energy consumption, research and development on parallel optical modules are increasing. However, in existing technologies, the packaging size of such wavelength division multiplexing / demultiplexing devices is too large, and as the number of channels increases, the optical path difference becomes significant, amplifying the additional losses caused by accumulated manufacturing errors. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-performance, multi-channel wavelength division multiplexing and demultiplexing optical module.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A high-performance multi-channel wavelength division multiplexing and demultiplexing optical module includes a substrate, long-wavelength and short-wavelength filters, a long-wavelength filter group, a short-wavelength filter group, a substrate, and a corner prism.

[0006] The substrate has a first side surface on its left side and a second side surface on its right side. The first side surface is provided with a Com end, which is coated with an antireflection film. The first side surface is divided into a total reflection surface except for the Com end. The second side surface is an antireflection surface. The first side surface and the second side surface are parallel and tilted to the right at an angle A. Horizontally incident light is refracted at an angle B after entering the substrate at an incident angle A.

[0007] The long-wavelength and short-wavelength filters, the long-wavelength filter group, the substrate, and the short-wavelength filter group are arranged sequentially from bottom to top on the right end of the second side surface of the substrate;

[0008] The long and short wave filters reflect long wave signal light and transmit short wave signal light.

[0009] The substrate is anti-reflective to all wavelengths;

[0010] The corner prism is located on the right side of the long-wavelength and short-wavelength filters, the long-wavelength filter group, and the substrate. The corner prism has an isosceles trapezoidal cross-section. The two parallel surfaces of the corner prism are coated with anti-reflection films to enhance the light transmission of all wavelengths. The two inclined surfaces of the corner prism are coated with high-reflection films to reflect short-wavelength signal light. The angle C between the inclined surface and the parallel surface of the corner prism is used to shift the short-wavelength signal light transmitted through the long-wavelength and short-wavelength filters upward and incident at an incident angle A onto the right side of the substrate. After refraction by the substrate, the light is transmitted horizontally upward within the substrate at a refraction angle B.

[0011] Furthermore, the long-wavelength filter group is composed of n-1 filters arranged sequentially, wherein the first filter transmits the long-wavelength signal light λ1 and reflects other wavelengths; the second filter transmits the long-wavelength signal light λ2 and reflects other wavelengths, and so on, the (n-1)th filter transmits the long-wavelength signal light λn-1 and reflects other wavelengths.

[0012] The short-wavelength filter group consists of n-1 filters arranged sequentially. The nth filter transmits the short-wavelength signal light λn+1 and reflects other wavelengths; the (n+1)th filter transmits the short-wavelength signal light λn+2 and reflects other wavelengths, and so on, with the (2n-2)th filter transmitting the short-wavelength signal light λ2n-1 and reflecting other wavelengths; where n≥3 and is an integer.

[0013] Compared with the prior art, the present invention has the following advantages: The present invention has a reasonable structural design and uses corner prisms and long and short wave filters, which shortens the optical path by nearly half compared with the transmission cascade scheme, which is conducive to improving coupling efficiency; it reduces the number of channel reflections, reduces the additional losses caused by the superposition of processing engineering, and effectively shortens the module size of multi-channel multiplexing and demultiplexing. Attached Figure Description

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0015] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the optical path in the first embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the angle of the corner prism in the first embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the optical path in the second embodiment of this utility model. Detailed Implementation Example

[0020] like Figure 1-3 As shown, this utility model discloses a high-performance multi-channel wavelength division multiplexing and demultiplexing optical module, including a substrate 1001, long and short wave filters 1002, a long wave filter group, a short wave filter group, a substrate 1006, and a corner prism 1010.

[0021] The substrate 1001 has a first side surface on its left and a second side surface on its right. The lower end of the first side surface is provided with a Com end, which is coated with an antireflective film. The first side surface is divided into a total reflection surface except for the Com end. The second side surface is an antireflective surface. The first side surface and the second side surface are parallel and tilted to the right at an angle A. Horizontally incident light is refracted at an angle B after entering the substrate 1001 at an angle A. In this embodiment, angle A = 8°. Horizontally incident light is refracted at an angle B after entering the substrate 1001 at an angle A. In this embodiment, B = 5.33°.

[0022] The long-wavelength and short-wavelength filter 1002, the long-wavelength filter group, the substrate 1006, and the short-wavelength filter group are arranged sequentially from bottom to top on the right end of the second side surface of the substrate 1001.

[0023] The long and short wave filters 1002 are set at the Com end. The long and short wave filters 1002 reflect long wave signal light (λ1, λ2...λn) and transmit short wave signal light (λn+1, λn+2...λ2n).

[0024] The long-wavelength filter group consists of n-1 filters arranged sequentially. The first filter 1003 transmits the long-wavelength signal light λ1 and reflects other wavelengths; the second filter 1004 transmits the long-wavelength signal light λ2 and reflects other wavelengths, and so on, the (n-1)th filter transmits the long-wavelength signal light λn-1 and reflects other wavelengths.

[0025] The short-wavelength filter group consists of n-1 filters arranged sequentially. The nth filter transmits the short-wavelength signal light λn+1 and reflects other wavelengths; the (n+1)th filter transmits the short-wavelength signal light λn+2 and reflects other wavelengths, and so on, with the (2n-2)th filter transmitting the short-wavelength signal light λ2n-1 and reflecting other wavelengths; where n≥3 and is an integer.

[0026] In this embodiment, n=4, that is, long-wavelength signal light λ1, λ2, λ3, λ4, and short-wavelength signal light λ5, λ6, λ7, λ8.

[0027] The long-wavelength filter group consists of three filters: the first filter 1003 transmits λ1 long-wavelength signal light and reflects other wavelengths; the second filter 1004 transmits λ2 long-wavelength signal light and reflects other wavelengths; and the third filter 1005 transmits λ3 long-wavelength signal light and reflects other wavelengths.

[0028] The shortwave filter group consists of three filters: the fourth filter 1007 transmits λ5 shortwave signal light and reflects other wavelengths; the fifth filter 1008 transmits λ6 shortwave signal light and reflects other wavelengths; and the sixth filter 1009 transmits λ7 shortwave signal light and reflects other wavelengths.

[0029] The 1006 substrate is anti-reflective for all wavelengths.

[0030] An angle prism 1010 is disposed on the right side of the long and short wave filters 1002, the long wave filter group, and the substrate 1006. The cross-section of the angle prism 1010 is an isosceles trapezoidal structure. The two parallel surfaces of the angle prism 1010 are coated with anti-reflection films to enhance the light transmission of all wavelengths. The two inclined surfaces of the angle prism 1010 are coated with high-reflection films to reflect short wave signal light. The angle C between the inclined surface and the parallel surface of the angle prism 1010, in this embodiment C=42.27°, is used to shift the short wave signal light transmitted through the long and short wave filters 1002 upward and incident it onto the right side of the substrate 1001 at an incident angle A (8°). After refraction by the substrate 1001, the light is transmitted within the substrate 1001 at a horizontally upward refraction angle B (5.33°).

[0031] The horizontally input light (including signal light of wavelengths λ1, λ2, λ3, λ4, λ5, λ6, λ7, and λ8) from the Com terminal is refracted at the lower end of the first side surface of the substrate 1001, and then incident on the long and short wave filters 1002. The long wave signal light (λ1, λ2, λ3, and λ4) is reflected and then incident on the high-reflection film on the first side surface of the substrate 1001, where it is reflected again. The reflected light hits the first filter 1003 of the long wave filter group. After passing through the first filter 1003, the long wave signal light of λ1 is transmitted and then exits through the parallel surface of the corner prism 1010. The remaining long wave signal light (λ2, λ3, and λ4) is reflected after passing through the first filter 1003 and then incident on the high-reflection film on the first side surface of the substrate 1001 for reflection. The reflected light hits the second filter 1004, and the long-wavelength signal light λ2 is transmitted through the second filter 1004, and then exits through the parallel surface of the corner prism 1010; the remaining signal light (λ3, λ4) is reflected after passing through the second filter 1004, and then incident on the high-reflection film on the first side surface of the substrate 1001 for reflection. The reflected light hits the third filter 1005, and the long-wavelength signal light λ3 is transmitted through the third filter 1005, and then exits through the parallel surface of the corner prism 1010; the remaining signal light (λ4) is reflected after passing through the third filter 1005, and then incident on the high-reflection film on the first side surface of the substrate 1001 for reflection. The reflected light hits the substrate 1006 for transmission, and then exits through the parallel surface of the corner prism 1010.

[0032] Short-wavelength signal light (λ5, λ6, λ7, λ8) is transmitted and output after passing through long-wavelength and short-wavelength filters 1002. The transmitted light is incident on corner prism 1010, reflected by the lower inclined surface of corner prism 1010, and then input to its upper surface. After further reflection, it is output and passes through substrate 1006 before being incident on substrate 1001. By controlling the angle between the upper and lower inclined surfaces of corner prism 1010, the light incident on substrate 1001 is made parallel to the long-wavelength signal light (λ1, λ2, λ3, λ4) reflected by long-wavelength and short-wavelength filters 1002. Then, it is incident on the high-reflection film on the first side surface of substrate 1001 and reflected. The reflected light hits the fourth filter 1007 of the short-wavelength filter group. After passing through the fourth filter 1007, the short-wavelength signal light λ5 is transmitted; the remaining short-wavelength signal light (λ6, λ7, λ8) is transmitted through the filter 1002. 7. The light (λ7, λ8) is reflected by the 4th filter 1007 and then incident on the high-reflection film on the first side surface of the substrate 1001. The reflected light hits the 5th filter 1008, and the short-wavelength signal light (λ6) is transmitted after passing through the 5th filter 1008. The remaining short-wavelength signal light (λ7, λ8) is reflected by the 5th filter 1008 and then incident on the high-reflection film on the first side surface of the substrate 1001. The reflected light hits the 6th filter 1009, and the short-wavelength signal light (λ7) is transmitted after passing through the 6th filter 1009. The remaining short-wavelength signal light (λ8) is reflected by the 6th filter 1009 and then incident on the high-reflection film on the first side surface of the substrate 1001. The reflected light is transmitted to the second side surface of the substrate 1001. This achieves the demultiplexing of the Com short-input multi-channel signal light.

[0033] Similarly, the multi-channel signal light input from the second side surface of the reversible structure can be combined and output from the Com terminal after passing through this module. Example

[0034] like Figure 4 and Figure 5 As shown, Embodiment 2 is a modification of Embodiment 1. The two are based on the same principle, and the only difference is that the substrates include the first substrate 2006 and the second substrate 2010, and the positions of the long-wavelength and short-wavelength filters 2002, the long-wavelength filter group, the short-wavelength filter group, the first substrate 2006, the second substrate 2010 and the corner prism 2011 are changed.

[0035] The specific structure of Embodiment 2 includes: a substrate 2001, a long-wavelength and short-wavelength filter 2002, a first filter 2003, a second filter 2004, a third filter 2005, a first substrate 2006, a fourth filter 2007, a fifth filter 2008, a sixth filter 2009, a second substrate 2010, and a corner prism 2011.

[0036] The first substrate 2006, the short-wavelength filter group, the second substrate 2010, the long-wavelength and short-wavelength filter 2002, and the long-wavelength filter group are arranged sequentially from bottom to top on the right end of the second side surface of the substrate 2001. The corner prism 2011 is located on the right side of the first substrate 2006, the short-wavelength filter group, the second substrate 2010, and the long-wavelength and short-wavelength filter 2002.

[0037] The horizontally input light (containing signal light of wavelengths λ1, λ2, λ3, λ4, λ5, λ6, λ7, and λ8) from the Com terminal is refracted at the middle of the first side surface of the substrate 2001, and then incident on the long-wavelength and short-wavelength filters 2002. The long-wavelength signal light (λ1, λ2, λ3, and λ4) is reflected and then sequentially passes through the filters of the long-wavelength filter group, with λ1, λ2, λ3, and λ4 separated from their respective filters. The short-wavelength signal light (λ5, λ6, λ7, and λ8) is transmitted, and after being reflected by the inclined surface at the upper end of the corner prism, it is transmitted... The light enters through the lower inclined surface of the substrate, is reflected, and then output. The output light passes through the substrate and is incident on the substrate 2001. Similar to Embodiment 1, by controlling the angle between the upper and lower inclined surfaces of the corner prism 2011, the light incident on the substrate 2001 is parallel to the long-wave signal light (λ1, λ2, λ3, λ4) reflected after passing through the long and short-wave filters 2002. Then, the light incident on the high-reflection film on the first side surface of the substrate 2001 is reflected. The reflected light hits the short-wave filter group and then passes through each filter of the short-wave filter group in sequence. λ5, λ6, λ7, and λ8 are separated from their respective filters.

[0038] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A high-performance multi-channel wavelength division multiplexing / demultiplexing optical module, characterized in that: Includes a substrate, long-wavelength and short-wavelength filters, a long-wavelength filter group, a short-wavelength filter group, a substrate, and a corner prism; The substrate has a first side surface on its left side and a second side surface on its right side. The first side surface is provided with a Com end, which is coated with an antireflection film. The first side surface is divided into a total reflection surface except for the Com end. The second side surface is an antireflection surface. The first side surface and the second side surface are parallel and tilted to the right at an angle A. Horizontally incident light is refracted at an angle B after entering the substrate at an incident angle A. The long and short wave filters are set at the Com end, and the long and short wave filters reflect long wave signal light and transmit short wave signal light. The substrate is anti-reflective to all wavelengths; The corner prism has an isosceles trapezoidal cross-section. The two parallel surfaces of the corner prism are coated with antireflective films to enhance the light transmission of all wavelengths. The two inclined surfaces of the corner prism are coated with high-reflective films to reflect short-wavelength signal light. The angle C between the inclined surface and the parallel surface of the corner prism is used to shift the short-wavelength signal light transmitted through the long-wavelength and short-wavelength filters upward or downward and incident it onto the right side of the substrate at an incident angle A. After refraction by the substrate, the light is transmitted within the substrate at a horizontal upward or downward refraction angle B.

2. The high-performance multi-channel wavelength division multiplexing / demultiplexing optical module according to claim 1, characterized in that: The long-wavelength and short-wavelength filters, the long-wavelength filter group, the substrate, and the short-wavelength filter group are arranged sequentially from bottom to top on the right end of the second side surface of the substrate; the corner prism is arranged on the right side of the long-wavelength and short-wavelength filters, the long-wavelength filter group, and the substrate.

3. The high-performance multi-channel wavelength division multiplexing / demultiplexing optical module according to claim 1, characterized in that: The substrate includes a first substrate and a second substrate. The first substrate, the short-wavelength filter group, the second substrate, the long-wavelength and short-wavelength filters, and the long-wavelength filter group are arranged sequentially from bottom to top on the right end of the second side surface of the substrate. The corner prism is arranged on the right side of the first substrate, the short-wavelength filter group, the second substrate, and the long-wavelength and short-wavelength filters.

4. A high-performance multi-channel wavelength division multiplexing / demultiplexing optical module according to claim 1, characterized in that: The long-wavelength filter group consists of n-1 filters arranged sequentially. The first filter transmits the long-wavelength signal light λ1 and reflects other wavelengths; the second filter transmits the long-wavelength signal light λ2 and reflects other wavelengths, and so on, the (n-1)th filter transmits the long-wavelength signal light λn-1 and reflects other wavelengths. The short-wavelength filter group consists of n-1 filters arranged sequentially. The nth filter transmits the short-wavelength signal light λn+1 and reflects other wavelengths; the (n+1)th filter transmits the short-wavelength signal light λn+2 and reflects other wavelengths, and so on, with the (2n-2)th filter transmitting the short-wavelength signal light λ2n-1 and reflecting other wavelengths; where n≥3 and is an integer.

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