A multi-probe hybrid package TO optical assembly and optical module

Abstract

This invention relates to the field of optical communication technology, and in particular to a TO optical component and module with a multi-detector hybrid package. The TO optical component includes: a base and a teardrop-shaped cap; the base has a first mounting surface and at least one second mounting surface; a first detector chip is disposed on the first mounting surface, and a second detector chip is disposed on the second mounting surface; at least one filter is disposed between the first detector chip and the teardrop-shaped cap, the filter being used to decompose the received optical signal into transmitted light and reflected light, with the transmitted light continuing to propagate towards the first detector chip; a reflector is disposed above each second detector chip, the reflector being used to further reflect the reflected light from its corresponding filter back to the second detector chip; a vertical height difference exists between the first and second mounting surfaces, ensuring that the optical path of the optical signal is the same. By combining the teardrop-shaped cap and the base with mounting surfaces of different vertical heights, the overall volume of the coaxial optical receiving component is reduced.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and in particular to a TO optical component and optical module with a multi-detector hybrid package. Background Technology

[0002] Conventional combined passive optical network optical line terminals (PON OLTs) or passive optical network optical network units (PON ONUs) coaxial optical receiver sub-assemblies (BOSAs) typically employ at least two independently packaged TO optical components for their uplink multi-wavelength solutions. This involves encapsulating the detector chips used to receive at least two uplink wavelength optical signals within their respective independent TO packages, followed by step-by-step coupling and curing. This approach results in a relatively large overall size and high material and manufacturing costs for the coaxial optical receiver.

[0003] Currently, there are hybrid packaging solutions available for two detector chips. These solutions use a multi-lens combination to ensure that the optical signals incident on both detector chips are converged and that the optical path length of the converged portion is consistent. However, the optical path of the multi-lens combination is complex and involves a large number of components, which still cannot solve the problem of the overall large size of the coaxial optical receiver. Furthermore, this solution is not suitable for coaxial optical receivers that need to receive two or more uplink wavelength optical signals. In addition, this solution has limitations on the types of uplink wavelength optical signals and is not compatible with cases where the uplink wavelength optical signal is converged.

[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing hybrid packaging scheme has a large number of parts, resulting in a large overall size of the coaxial optical receiving component, and there are limitations on the number and types of uplink wavelength optical signals.

[0006] The present invention adopts the following technical solution: In a first aspect, the present invention provides a TO optical component with multi-detector hybrid packaging, comprising: a base 1 and a teardrop-shaped cap 2, wherein: The base 1 is provided with a first mounting surface 10 that is furthest from the water droplet cap 2 and at least one second mounting surface 11. A first detection chip 100 is provided on the first mounting surface 10 and a second detection chip 110 is provided on the second mounting surface 11. At least one filter 3 is disposed between the first detection chip 100 and the water droplet cap 2. The filter 3 is used to decompose the received light signal into transmitted light and reflected light. The transmitted light continues to propagate in the direction of the first detection chip 100. A reflector 4 is disposed above each of the second detection chips 110. The reflector 4 is used to reflect the reflected light reflected by the filter 3 corresponding to it back to the second detection chip 110. There is a vertical height difference between the first mounting surface 10 and the second mounting surface 11, which makes the optical path of the optical signal the same.

[0007] Furthermore, when there are two or more second mounting surfaces 11, the second mounting surfaces 11 are distributed on one side of the first mounting surface 10, or the second mounting surfaces 11 are distributed on both sides of the first mounting surface 10.

[0008] Furthermore, the number of the filter chips 3 is the same as the number of the second detection chips 110.

[0009] Furthermore, the detection center of the second detection chip 110 is spaced at a preset horizontal distance from the detection center of the first detection chip 100, and the vertical height difference between the second mounting surface 11 and the first mounting surface 10 is the same as the preset horizontal distance.

[0010] Furthermore, the reflector 4 and the corresponding filter 3 are located at the same horizontal height.

[0011] Furthermore, the detection center of the second detection chip 110 is spaced apart from the detection center of the first detection chip 100 by a preset horizontal distance, and the vertical height difference between the second mounting surface 11 and the first mounting surface 10 is less than the preset horizontal distance. The filter 3 has an irregular shape, and the transmitted light is reflected at least twice within the filter 3 before being emitted to the next device, in order to compensate for the optical path difference caused by the difference between the vertical height difference and the preset horizontal distance.

[0012] Furthermore, the filter 3 also includes a first reflective surface 36 and a second reflective surface 37, both coated with reflective films. The transmitted light is reflected sequentially by the first reflective surface 36 and the second reflective surface 37 before being incident on the next device.

[0013] Furthermore, the vertical height difference between at least one of the second mounting surfaces 11 and the first mounting surface 10 increases according to a preset gradient to ensure that the optical path of each wavelength of optical signal is the same.

[0014] In a second aspect, the present invention provides an optical module, including a tube body 7, an adapter 8, and a TO optical component with the above-mentioned multi-detector hybrid encapsulation; The TO package is installed on the tube wall of the tube body 7, and the adapter 8 is fixed together with the tube body 7. The adapter 8 is used to connect the optical fiber.

[0015] The advantages of this invention are as follows: Existing hybrid packaging solutions require individual focusing lenses for each detector chip, forming a multi-lens combination. This invention integrates the function of the multi-lens combination into the teardrop-shaped cap, replacing the collimation and focusing functions of the multi-lens combination. This allows external light signals to be converted into focused light upon entering the TO component, reducing the number of parts. Simultaneously, by setting a base with mounting surfaces of different vertical heights, the optical path of the focused light incident on the first detector chip and at least one second detector chip is made consistent. There are no restrictions on the type of uplink wavelength light signal incident on the teardrop-shaped cap; this solution applies regardless of whether the external light signal is parallel or focused. Because the teardrop-shaped cap integrates the function of the multi-lens combination, the number of parts is reduced, the overall size of the coaxial light receiving component is decreased, and manufacturing costs are lowered. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of a TO optical component; Figure 2 This is a schematic diagram of the structure of a base and a teardrop-shaped cap provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a base and a teardrop-shaped cap provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a base and a teardrop-shaped cap provided in an embodiment of the present invention; Figure 5 This is a schematic diagram showing the relative positions of a first detection chip and a second detection chip provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the optical path of a TO optical component with two second detector chips provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the optical path of a TO optical component with four second detector chips provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the optical path of a TO optical component with two second detector chips provided in an embodiment of the present invention; Figure 9This is a schematic diagram of the optical path of a TO optical component with two second detector chips provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the optical path of a TO optical component with four second detector chips provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of a base provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of a filter and a reflective sheet provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of the optical path of a filter and a reflector provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of the structure of a filter provided in an embodiment of the present invention; Figure 15 This is an exploded view of the structure of a TO optical component provided in an embodiment of the present invention; Figure 16 This is a structural schematic diagram of a base, a teardrop-shaped cap, and a support provided in an embodiment of the present invention; Figure 17 This is a schematic diagram of the structure of an optical module provided in an embodiment of the present invention.

[0018] The attached figures are labeled as follows: Base 1, First mounting surface 10, First detection chip 100, Second mounting surface 11, Second detection chip 110, Water droplet cap 2, Filter 3, First filter 30, Second filter 31, Third filter 32, Fourth filter 33, Beam splitter 34, Transmission surface 35, First reflection surface 36, Second reflection surface 37, Reflector 4, First reflection surface 40, Second reflection surface 41, Third reflection surface 42, Fourth reflection surface 43, Reflector 44, TO cap 5, Bracket 50, Isolation waveplate 6, Tube body 7, Inner cavity 70, Adapter 8, First chip 90, Second chip 91, Filter waveplate 92, Reflection waveplate 93, First lens 94, Second lens 95, Third lens 96. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0021] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the corresponding features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0022] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other, such as "optical coupling," "wireless connection," etc. The embodiments disclosed herein are not necessarily limited to the scope of this invention.

[0023] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1: See Figure 1There exists a hybrid packaging scheme that integrates two detector chips, namely the first chip 90 and the second chip 91, into a single TO optical component. Both the first chip 90 and the second chip 91 are photodetectors, and their detection surfaces are at the same height. Figure 1 As can be seen, the optical path length of light signals of different wavelengths is not the same, therefore, Figure 1 The provided solution is only applicable when the incident light is parallel. The first lens 94 collimates the incident parallel light and directs it onto the filter 92, which decomposes the parallel light into transmitted and reflected light. The signal light incident on the first chip 90 and the second chip 91 needs to be converging light. The TO optical component also includes a second lens 95 and a third lens 96. The transmitted light passes through the second lens 95 to form a first converging light, which is incident on the first chip 90. The reflected light is incident on the reflective plate 93 and reflected by the reflective plate 93 to the third lens 96. The reflected light passes through the third lens 96 to form a second converging light, which is incident on the second chip 91. To ensure that the optical path lengths of the first and second converging lights are consistent, the second lens 95 and the third lens 96 are located at the same horizontal level.

[0025] This solution reduces the overall size of the coaxial optical receiver to some extent, but two problems still exist: First, due to the large size of the second lens 95 and the third lens 96, the overall size of the improved coaxial optical receiver is still large, and the optical path is relatively complex; Second, this structure cannot be compatible with the case where the incident light is a converging light. The reason is that when the uplink wavelength light signal incident on the first lens 94 is a converging light, the optical path of the converging light incident on the second chip 91 is greater than the optical path of the converging light incident on the first chip 90. The light signals incident on the two detector chips will not meet the requirement of consistent optical path. Moreover, this solution is only applicable to two uplink wavelength light signals and is difficult to meet the coupling requirements of multiple uplink wavelength light signals.

[0026] To address the aforementioned problems, Embodiment 1 of the present invention provides a TO optical component with a multi-detector hybrid package. Figure 2 , Figure 3 and Figure 4The overall structure of the TO optical assembly with different numbers of detector chips is shown. They collectively include a base 1 and a teardrop-shaped cap 2. The base 1 has a first mounting surface 10 furthest from the teardrop-shaped cap 2 and at least one second mounting surface 11. A first detector chip 100 is mounted on the first mounting surface 10, and a second detector chip 110 is mounted on the second mounting surface 11. The teardrop-shaped cap 2 can converge divergent light signals into focused light. Thus, by setting the teardrop-shaped cap 2 so that the light signals incident on the first detector chip 100 and the second detector chip 110 are focused light, the functions of the first lens 94, the second lens 95, and the third lens 96 in the aforementioned scheme are integrated onto the teardrop-shaped cap 2. Compared to the aforementioned scheme, this reduces the number of parts and thus reduces the overall size of the coaxial optical receiving assembly.

[0027] To achieve the separation of light signals of different wavelengths, at least one filter 3 is disposed between the first detection chip 100 and the water droplet cap 2. The filter 3 is used to decompose the received light signal into transmitted light and reflected light, and the transmitted light continues to propagate in the direction of the first detection chip 100. A reflector 4 is disposed above each of the second detection chips 110. The reflector 4 is used to reflect the reflected light from the corresponding filter 3 back to the second detection chip 110. In practical applications, different filter 3s are matched with reflectors 4s of different wavelengths, so that each group of optical paths forms an independent beam splitting channel. Different second detection chips 110 respectively receive light beams of specific wavelengths, thereby enabling each detection chip to accurately pick up the light signal of the corresponding wavelength. That is, the filter 3 corresponding to the reflector 4 can reflect light signals of the same wavelength, and the combinations of wavelengths transmitted and reflected by different filter 3s are different. In this way, each detection chip can receive the light signal of the corresponding wavelength.

[0028] In one optional embodiment, at least one of the filters 3 is located on the line connecting the water droplet cap 2 and the first detection chip 100, so that the light signal transmitted through at least one of the filters 3 can be incident on the first detection chip 100, and the second detection chip 110 is located on the reflected light path of the corresponding reflector 4, so that the light signal can be incident on the second detection chip 110 via the reflector 4.

[0029] In this embodiment, when an external optical signal enters the TO optical component, it first passes through the teardrop cap 2, which converts the incident optical signal into focused light. To ensure coupling efficiency, the optical path length of each wavelength of optical signal from the teardrop cap 2 to the corresponding detection chip must be consistent. Therefore, the vertical height difference between at least one of the second mounting surfaces 11 and the first mounting surface 10 increases according to a preset gradient to ensure that the optical path length of each wavelength of optical signal is the same.

[0030] By setting the first mounting surface 10 and the second mounting surface 11 with a vertical height difference, the two beams of converging light incident on the first detector chip 100 and the second detector chip 110 meet the requirement of consistent optical path. In this way, regardless of whether the light signal incident on the water droplet cap 2 is parallel light or converging light, the requirement that the light signal incident on the first detector chip 100 and the second detector chip 110 is converging light and has consistent optical path can be met.

[0031] It should be noted that the reason for setting the first mounting surface 10 and the second mounting surface 11 on the base 1 is essentially to replace the horizontal distance between the first detection chip 100 and the second detection chip 110 with the vertical height difference between the first mounting surface 10 and the second mounting surface 11, thereby achieving the purpose of consistent optical path between transmitted light and reflected light.

[0032] In one optional embodiment, the overall height of the TO optical assembly satisfies the required vertical height difference between the first mounting surface 10 and the second mounting surface 11. The shape of the filter 3 and the relative positions of the filter 3 and the reflective sheet 4 can be as follows: Figure 2 , Figure 3 and Figure 4 As shown.

[0033] In another optional embodiment, the overall height of the TO optical component does not meet the vertical height difference required between the first mounting surface 10 and the second mounting surface 11. By adaptively adjusting the shape of the filter 3 and the relative position of the filter 3 and the reflector 4, the transmitted light and the reflected light can also meet the requirement of consistent optical path, as described in Embodiment 2.

[0034] Next Figure 2 , Figure 3 and Figure 4 The common layout principles of the components in the TO optical assembly are explained in detail.

[0035] In one optional embodiment, the number of filters 3 is the same as the number of second detector chips 110. In practice, each second detector chip 110 is equipped with one filter 3 and one reflector 4. The filter 3 is used to separate the optical signal of the wavelength corresponding to the second detector chip 110 from the incident optical signal, and the reflector 4 is used to change the propagation direction of the optical signal of the corresponding wavelength so that the optical signal of the corresponding wavelength can enter the second detector chip 110.

[0036] To meet the requirement of consistent optical path, the detection center of the second detection chip 110 is spaced at a preset horizontal distance from the detection center of the first detection chip 100, and the vertical height difference between the second mounting surface 11 and the first mounting surface 10 is the same as the preset horizontal distance.

[0037] That is, the vertical height difference between the second mounting surface 11 and the first mounting surface 10 is equal to the horizontal distance between the detection center of the second detection chip 110 mounted on the second mounting surface 11 and the detection center of the first detection chip 100. The following uses... Figure 5 To illustrate why satisfying the aforementioned relationship ensures optical path consistency, let's assume the vertical height difference between a second mounting surface 11 and the first mounting surface 10 is h1. Since the first detection chip 100 and the second detection chip 110 have the same external dimensions, the vertical height difference between them is also h1. Similarly, let's assume the vertical height difference between the second mounting surface 11 and the corresponding reflector 4 is h2, the preset horizontal distance is h3, and the vertical height difference between the corresponding filter 3 and the first detection chip 100 is h4. To ensure that the optical paths of the light signals detected by the first detection chip 100 and the second detection chip 110 are consistent, h2 + h3 = h4 must be satisfied, and h4 = h1 + h2, therefore h1 = h3.

[0038] Furthermore, in order to make the optical path of the reflected light as short as possible, the reflector 4 and the corresponding filter 3 are located at the same horizontal height.

[0039] Next Figure 2 , Figure 3 and Figure 4 The optical paths of the TO optical component in the three implementation methods shown are explained in detail.

[0040] Implementation Method 1: See Figure 5The base 1 is provided with a second mounting surface 11, which is distributed on one side of the first mounting surface 10. The filter 3 is provided between the water droplet cap 2 and the first detection chip 100. The filter 3 decomposes the converging light incident from the water droplet cap 2 into transmitted light and reflected light. The transmitted light propagates downward to the first detection chip 100, and the reflected light propagates to the corresponding reflector 4 and is reflected by the reflector 4 to the second detection chip 110.

[0041] Since there is only one second detection chip 110, only one filter 3 is provided between the water droplet cap 2 and the first detection chip 100. A reflector 4 is provided along the reflected light path of the filter 3. In an optional embodiment, the first detection chip 100 is a 1270 optical receiver chip, the second detection chip 110 is a 1310 optical receiver chip, and correspondingly, the filter 3 is a T1270 / R1310 filter, and the reflector 4 is an R1310 reflector. This allows the filter 3 to transmit a 1270nm wavelength light signal to the first detection chip 100 and simultaneously reflect a 1310nm wavelength light signal to the reflector 4. The reflector 4 can reflect a 1310nm wavelength light signal to the second detection chip 110.

[0042] Implementation Method Two: See Figure 6 The base 1 is provided with two second mounting surfaces 11, which are respectively distributed on both sides of the first mounting surface 10. A first filter 30 and a second filter 31 are arranged sequentially along the optical path between the water droplet cap 2 and the first detection chip 100. The first filter 30 decomposes the converging light incident from the water droplet cap 2 into a first transmitted light and a first reflected light. The first transmitted light propagates downward to the second filter 31, and the first reflected light propagates to the corresponding first reflector 40 and is reflected by the first reflector 40 to the second detection chip 110 located below the first reflector 40. The second filter 31 decomposes the first transmitted light into a second transmitted light and a second reflected light. The second transmitted light propagates downward to the first detection chip 100, and the second reflected light propagates to the corresponding second reflector 41 and is reflected by the second reflector 41 to the second detection chip 110 located below the second reflector 41.

[0043] Since there are two second detection chips 110, a first filter 30 and a second filter 31 are arranged sequentially from top to bottom between the water droplet cap 2 and the first detection chip 100. A first reflective sheet 40 is arranged along the reflected light path of the first filter 30, and a second reflective sheet 41 is arranged along the reflected light path of the second filter 31. In an optional embodiment, the first detection chip 100 is a 1270 optical receiver chip, the second detection chip 110 on the first reflective sheet 40 is a 1286 optical receiver chip, and the second detection chip 110 located to the right of the first detection chip 100 is a 1310 optical receiver chip. Correspondingly, the first filter 30 is a T1270 / R1286 filter, and the second filter 31 is a T1270 / R1310 filter. The first reflective sheet 40 is an R1286 reflective sheet, and the second reflective sheet 41 is an R1310 reflective sheet. This allows the first filter 30 to transmit the first transmitted light with a wavelength of 1270nm to the second filter 31, while simultaneously reflecting the first reflected light with a wavelength of 1286nm to the first reflective sheet 40. The first reflective sheet 40 then reflects the first reflected light with a wavelength of 1286nm to the second detection chip 110 located below the first reflective sheet 40. The second filter 31 transmits the second transmitted light with a wavelength of 1270nm to the first detection chip 100, while simultaneously reflecting the second reflected light with a wavelength of 1310nm to the second reflective sheet 41. The second reflective sheet 41 then reflects the second reflected light with a wavelength of 1310nm to the second detection chip 110 located below the second reflective sheet 41.

[0044] Implementation method three: See Figure 7The base 1 has four second mounting surfaces 11, which are respectively distributed on both sides of the first mounting surface 10. A first filter 30, a second filter 31, a third filter 32, and a fourth filter 33 are sequentially arranged along the optical path between the water droplet cap 2 and the first detection chip 100. The first filter 30 decomposes the converging light incident from the water droplet cap 2 into first transmitted light and first reflected light. The first transmitted light propagates downwards to the second filter 31, and the first reflected light propagates to the corresponding first reflector 40 and is reflected by the first reflector 40 to the second detection chip 110 located below the first reflector 40. The second filter 31 decomposes the first transmitted light into second transmitted light and second reflected light. The second transmitted light propagates downwards to the third filter 32. The second reflected light propagates to the corresponding second reflector 41 and is reflected by the second reflector 41 to the second detector chip 110 located below the second reflector 41; the third filter 32 decomposes the second transmitted light into a third transmitted light and a third reflected light, the third transmitted light propagates downward to the fourth filter 33, the third reflected light propagates to the corresponding third reflector 42 and is reflected by the third reflector 42 to the second detector chip 110 located below the third reflector 42; the fourth filter 33 decomposes the third transmitted light into a fourth transmitted light and a fourth reflected light, the fourth transmitted light propagates downward to the first detector chip 100, and the fourth reflected light propagates to the fourth reflector 43 and is reflected by the fourth reflector 43 to the second detector chip 110 located below the fourth reflector 43.

[0045] The models and specific optical path processes of the corresponding detector chip, filter, and reflector in the third implementation method can be referred to in the first and second implementation methods, and will not be repeated here.

[0046] The distribution of the second mounting surface 11 can be flexibly set according to the number of the second detection chips 110 (corresponding to implementation mode 1, implementation mode 2, and implementation mode 3). When the number of the second mounting surface 11 is one, in an optional embodiment, the second mounting surface 11 can be distributed on any side of the first mounting surface 10 (e.g., Figure 5 (As shown). When there are two or more second mounting surfaces 11, as shown... Figure 6 and Figure 7 As shown, the second mounting surface 11 is distributed on both sides of the first mounting surface 10; or, as... Figure 8 As shown, the second mounting surface 11 is distributed on one side of the first mounting surface 10.

[0047] More specifically, when there are two second mounting surfaces 11, the two second mounting surfaces 11 can be distributed on opposite sides of the first mounting surface 10 (e.g., Figure 6 (As shown); the two second mounting surfaces 11 can also be distributed on the same side of the first mounting surface 10. For example, the two second mounting surfaces 11 can be evenly distributed on the left or right side of the first mounting surface 10 (e.g. Figure 8 As shown); the two second mounting surfaces 11 can also be distributed on the adjacent sides of the first mounting surface 10 (e.g. Figure 9 (as shown), and Figure 8 compared to, Figure 6 and Figure 9 The layout is more compact in height (Z direction). In actual use scenarios, the layout of the base 1 is determined by those skilled in the art based on the actual situation.

[0048] Furthermore, when the number of second mounting surfaces 11 is four, the four second mounting surfaces 11 can be distributed at different heights on both sides of the first mounting surface 10 (e.g., Figure 7 As shown), they can also be distributed at the same height around the first mounting surface 10 (e.g. Figure 10 (as shown) Figure 10 and Figure 7 In comparison, different second mounting surfaces 11 can be located at the same horizontal height, reducing the space occupied by the base 1 in the X and Z directions, resulting in a more compact layout. Simultaneously, the optical path principle of the second mounting surfaces 11 distributed around the first mounting surface 10 is essentially the same as that of those distributed on both sides of the first mounting surface 10, which is beneficial in applications. Figure 10 In the layout shown, the second filter 31 needs to be adaptively adjusted to face the second reflector 41, and the fourth filter 33 needs to be adaptively adjusted to face the fourth reflector 43, so that each reflector 4 can receive the reflected light from the corresponding filter 3.

[0049] Example 2: Due to limitations in the manufacturing process, the actual height of the TO optical component may not reach the height shown in Embodiment 1. In order to meet the requirement of consistent optical path, taking the number of the second detector chip 110 as one as an example, Embodiment 2 of the present invention proposes an implementation method of the filter 3, as described below.

[0050] It is not difficult to understand that, due to the overall height limitation of the TO optical component, the vertical height difference between the first mounting surface 10 and the second mounting surface 11 is also limited. The detection center of the second detection chip 110 is spaced at a preset horizontal distance from the detection center of the first detection chip 100. The vertical height difference between the second mounting surface 11 and the first mounting surface 10 is less than the preset horizontal distance, resulting in the optical path of the reflected light being greater than that of the transmitted light. The above problem can be solved in two ways: first, by reducing the optical path of the reflected light; however, due to the height limitation of the second mounting surface 11, it is difficult to reduce the optical path of the reflected light; second, by increasing the optical path of the transmitted light. Therefore, as... Figure 11 As shown, the filter 3 used in this embodiment has an irregular shape. The transmitted light is reflected at least twice within the filter 3 before being emitted to the next device, in order to compensate for the optical path difference caused by the difference between the vertical height difference and the preset horizontal distance.

[0051] See Figure 12 In one optional embodiment, the side of the filter 3 closest to the corresponding reflector 4 is a beam-splitting surface 34. This beam-splitting surface 34 decomposes the converging light incident from the water droplet cap 2 into transmitted light and reflected light. The transmitted light undergoes at least two reflections within the filter 3 before exiting to the next device, while the reflected light directly incident on the reflector 4. This increases the optical path of the transmitted light, thereby ensuring that the optical path of the light signals incident on the second detector chip 110 is consistent with that of the first detector chip 100.

[0052] The side of the reflective sheet 4 closest to the corresponding filter sheet 3 is a reflective surface 44. The beam-splitting surface 34 is parallel to the reflective surface 44, allowing the reflective surface 44 to adjust the optical path of the reflected light so that it is vertically downward and incident on the second detection chip 110. It should be noted that in Embodiment 1, the beam-splitting surface 34 of the filter sheet 3 and the reflective surface 44 of the reflective sheet 4 are also parallel, allowing the reflected light to be reflected downward and incident on the second detection chip 110. Therefore, the optical path of the reflected light in this embodiment is essentially the same as that in Embodiment 1.

[0053] It should also be noted that in Embodiment 2, the filter 3 and the reflector 4 may not be at the same horizontal height, and the vertical height difference between the first detector chip 100 and the second detector chip 110 is not equal to the horizontal distance between the detection center of the first detector chip 100 and the detection center of the second detector chip 110. However, both Embodiment 1 and Embodiment 2 can meet the requirement that the optical path of the transmitted light and the reflected light are consistent, and the layout principle of the structure of Embodiment 1 and Embodiment 2 is consistent.

[0054] In one optional embodiment, to increase the optical path of the transmitted light, the filter 3 is in the shape of a pentagonal prism, see reference. Figure 13 The filter 3 further includes a first reflective surface 36 and a second reflective surface 37, both coated with reflective films. The transmitted light is reflected sequentially by the first reflective surface 36 and the second reflective surface 37 before entering the next device. Specifically, the incident point of the transmitted light on the filter 3 should fall within the horizontal projection of the first reflective surface 36, so that the transmitted light can be reflected sequentially by the first reflective surface 36 and the second reflective surface 37, and pass through the transmission surface 35 to enter the first detector chip 100. The optical path of the transmitted light is increased through two reflections to meet the requirement that the optical paths of the transmitted light and the reflected light are consistent. Figure 13 The dashed line shows the optical path of the transmitted light, and the solid line shows the optical path of the reflected light. In practical applications, the filter 3 can also be other forms including a reflective surface 44, a transmittance surface 35, a first reflective surface 36, and a second reflective surface 37, such as... Figure 14 The shape shown is a quadrangular prism.

[0055] It should be noted that, apart from the shape of the filter 3 and the relative positions of the filter 3 and the reflector 4, the optical path settings of Embodiment 1 and Embodiment 2 are essentially the same. When the TO optical component needs to receive optical signals of at least three uplink wavelengths, it can be set up by referring to the second and third implementation methods of the TO optical component in Embodiment 1.

[0056] To implement the aforementioned optical path, refer to... Figure 15 The TO optical assembly further includes a bracket 50 for fixing the filter 3 and the reflector 4. Specifically, the bracket 50 is housed within the TO cap 5 of the TO optical assembly, and the TO cap 5 also houses the base 1, the filter 3, and the reflector 4. The teardrop-shaped cap 2 is fixed to the TO cap 5 of the TO optical assembly.

[0057] Further, see Figure 16 The bracket 50 is fixed above the base 1. The bracket 50 has mounting slots corresponding to the positions of the filter 3 and the reflector 4 for fixing the filter 3 and the reflector 4. An isolation plate 6 is also provided between the reflector 4 and the second detection chip 110, and the isolation plate 6 is also fixed to the bracket 50 to isolate signal light of non-target wavelengths. In practical applications, the filter 3, the reflector 4, and the isolation plate 6 can all be glued and fixed to the bracket 50.

[0058] It should be noted that the filter 3 and the reflector 4 in Embodiment 1 are actually bonded and fixed to the bracket 50. In order to clearly show the optical path between the filter 3 and the reflector 4, the bracket 50 is not shown in Embodiment 1. The bracket 50 can be set with reference to Embodiment 2. However, the structural form of the bracket 50 needs to be adjusted according to the adaptability of the filter 3 and the reflector 4.

[0059] Example 3: See Figure 17 Embodiment 3 of the present invention provides an optical module, including a tube body 7, an adapter 8, and a TO optical component with a multi-detector hybrid package as described in Embodiment 1 or Embodiment 2. The TO package is installed on the tube wall of the tube body 7, and the adapter 8 is fixed together with the tube body 7. The adapter 8 is used to connect an optical fiber.

[0060] The light-emitting end of the adapter 8 and the light-inlet end of the TO optical component are both fixed on the tube body 7 and communicate with the inner cavity 70 of the tube body 7, so that the divergent light signal output by the optical fiber of the adapter 8 can be transmitted to the teardrop cap 2 and focused into a converging light by the teardrop cap 2.

[0061] The tube body 7 is also coupled with a first transmitter 71 and a second transmitter 72, which are integrated with the TO optical component and the adapter to form a two-transmit, two-receive coaxial optical receiver assembly. Specifically, the optical signals of different wavelengths output by the first transmitter 71 and the second transmitter 72 are combined within the inner cavity 70 and coupled into the optical fiber of the adapter 8 for output; the two uplink wavelength optical signals output from the optical fiber of the adapter 8 propagate within the inner cavity 70 and are incident on the teardrop-shaped cap 2. Compared with existing two-transmit, two-receive coaxial optical receiver assemblies, the two-transmit, two-receive coaxial optical receiver assembly provided in this embodiment reduces the volume of one TO optical component.

[0062] Existing hybrid packaging solutions require individual converging lenses for each detector chip, forming a multi-lens combination. This invention integrates the functionality of the multi-lens combination onto the teardrop-shaped cap 2, replacing the collimation and converging functions of the multi-lens combination. This allows external light signals to be converted into focused light upon entering the TO component, reducing the number of components. Simultaneously, by setting a base 1 with mounting surfaces of different vertical heights, the optical path of the focused light incident on the first detector chip 100 and at least one second detector chip 110 is made consistent. There are no restrictions on the type of upward wavelength light signal incident on the teardrop-shaped cap 2; this solution applies regardless of whether the external light signal is parallel or focused. Because the teardrop-shaped cap 2 integrates the functionality of the multi-lens combination, the number of components is reduced, the overall size of the coaxial light receiving component is decreased, and manufacturing costs are lowered.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A TO optical component with multi-detector hybrid packaging, characterized in that, include: The base (1) and the teardrop-shaped cap (2) are as follows: The base (1) is provided with a first mounting surface (10) that is furthest from the water droplet cap (2) and at least one second mounting surface (11). A first detection chip (100) is provided on the first mounting surface (10), and a second detection chip (110) is provided on the second mounting surface (11). At least one filter (3) is provided between the first detection chip (100) and the water droplet cap (2). The filter (3) is used to decompose the received light signal into transmitted light and reflected light. The transmitted light continues to propagate in the direction of the first detection chip (100). A reflector (4) is provided above each of the second detection chips (110). The reflector (4) is used to reflect the reflected light reflected by the filter (3) corresponding to it to the second detection chip (110). There is a vertical height difference between the first mounting surface (10) and the second mounting surface (11), so that the optical path of the optical signal is the same.

2. The TO optical component with multi-detector hybrid packaging according to claim 1, characterized in that, When there are two or more second mounting surfaces (11), the second mounting surfaces (11) are distributed on one side of the first mounting surface (10), or the second mounting surfaces (11) are distributed on both sides of the first mounting surface (10).

3. The TO optical component with multi-detector hybrid packaging according to claim 1, characterized in that, The number of filters (3) is the same as the number of the second detector chip (110).

4. The TO optical component with multi-detector hybrid packaging according to claim 1, characterized in that, The detection center of the second detection chip (110) is separated from the detection center of the first detection chip (100) by a preset horizontal distance, and the vertical height difference between the second mounting surface (11) and the first mounting surface (10) is the same as the preset horizontal distance.

5. The TO optical component with multi-detector hybrid packaging according to claim 4, characterized in that, The reflector (4) and the corresponding filter (3) are at the same horizontal level.

6. The TO optical component with multi-detector hybrid packaging according to claim 1, characterized in that, The detection center of the second detection chip (110) is separated from the detection center of the first detection chip (100) by a preset horizontal distance, and the vertical height difference between the second mounting surface (11) and the first mounting surface (10) is less than the preset horizontal distance; The filter (3) has an irregular shape. The transmitted light is reflected at least twice within the filter (3) before being emitted to the next device, in order to compensate for the optical path difference caused by the difference between the vertical height difference and the preset horizontal distance.

7. The TO optical component with multi-detector hybrid packaging according to claim 6, characterized in that, The side of the filter (3) close to the corresponding reflector (4) is a beam splitting surface (34). The beam splitting surface (34) is used to decompose the converging light incident on the water droplet cap (2) into transmitted light and reflected light. The transmitted light is reflected at least twice in the filter (3) before being emitted to the next device. The reflected light is directly incident on the reflector (4).

8. The TO optical component with multi-detector hybrid packaging according to claim 7, characterized in that, The filter (3) also includes a first reflective surface (36) and a second reflective surface (37) both coated with reflective films. The transmitted light is reflected sequentially by the first reflective surface (36) and the second reflective surface (37) and then incident on the next device.

9. The TO optical component with multi-detector hybrid packaging according to any one of claims 1-8, characterized in that, The vertical height difference between at least one of the second mounting surfaces (11) and the first mounting surface (10) increases according to a preset gradient to ensure that the optical path of each wavelength of optical signal is the same.

10. An optical module, characterized in that, Includes tube body (7), adapter (8) and TO optical component with multi-detector hybrid packaging as described in any one of claims 1-9; The TO package is installed on the tube wall of the tube body (7), the adapter (8) is fixed together with the tube body (7), and the adapter (8) is used to connect the optical fiber.

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