A receiver optical device
By employing a single-channel photoelectric conversion device and staggering the arrangement of lenses, prisms, detectors, and limiting amplifiers in the optical devices at the receiving end, the problems of large optical crosstalk and electromagnetic crosstalk in traditional optical devices at the receiving end are solved, thereby improving coupling tolerance and performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UNI-LIGHT HEFEI ELECTRONICS TECH CO LTD
- Filing Date
- 2025-10-28
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional optical receiver devices suffer from significant optical and electromagnetic crosstalk between adjacent channels. Furthermore, the decreasing size of the detector's photosensitive surface makes it difficult to improve coupling tolerance, hindering the achievement of high yield and good performance.
Single-channel photoelectric conversion devices are used, with the single-channel photoelectric conversion devices between adjacent optical channels offset by more than 0.25mm. Furthermore, the lenses, prisms, detectors, and limiting amplifiers of each optical channel are set independently to avoid sharing components.
It significantly reduces optical and electromagnetic crosstalk, improves coupling tolerance, and makes it easy to achieve high yield and good performance.
Smart Images
Figure CN224581740U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of communication technology, specifically to a receiving optical device. Background Technology
[0002] Traditional receiver optical devices such as Figure 1 As shown, it includes: a substrate, a first support, a second support, and a Z-blcok component. The second support is fixed on the substrate, which can be a printed circuit board, a ceramic substrate, a metal substrate, or a glass substrate. The Z-blcok component is fixed on the second support. The first support is located on the light-incident side of the Z-blcok component and is fixed to the substrate. A collimator coupled to the Z-blcok component is fixed on the first support. An array lens coupled to all its optical channels is arranged on the light-outceasing side of the Z-blcok component. The array lens is fixed on the second support. An array lens coupled to all its optical channels is arranged on the light-outceasing side of the array lens. An array prism is fixed on a second support and coupled to multiple detectors (PDs). The multiple detectors can be integrated into an array or are independent. If they are independent, the multiple detectors are arranged side by side on the same line. The multiple detectors are electrically connected to multiple limiting amplifiers, which can also be integrated into an array or are independent. If they are independent, the multiple limiting amplifiers are arranged side by side on the same line. The detectors are preferably electrically connected to the limiting amplifiers using gold wires. In this scheme, the length of the array prism is generally 2mm and the width is 0.5mm. The detector size is generally 0.25mm × 0.25mm.
[0003] The working principle is as follows: The collimator converts the light from the optical fiber into parallel light. This parallel light is coupled into the Z-blcok component, which then decomposes it into multiple paths, each entering a separate optical channel within the Z-blcok component. The multiple output beams from the Z-blcok component are converged by the same array lens and then incident on an array prism. The array prism then deflects the horizontal light downwards by 90° before coupling it into multiple detectors. The detectors convert the optical signal into an electrical signal, which is then transmitted to a limiting amplifier. The limiting amplifier amplifies and shapes the electrical signal. The components include the array lens, array prism, one detector, and a limiting amplifier. The amplitude amplifier constitutes the photoelectric conversion device, but the photoelectric conversion device uses a single array lens and array prism for all channels. In this scheme, array lenses and array prisms are used, and multiple detectors are either integrated or independent arrays. Furthermore, multiple detectors and the amplitude amplifier are arranged side by side on the same line. Therefore, the optical crosstalk and electromagnetic crosstalk between adjacent channels are relatively large, which has obvious defects in some special applications of receiver optical devices that require low crosstalk. In addition, the photosensitive surface of high-speed detectors is getting smaller and smaller. The use of array lenses and array prisms means that each channel cannot be adjusted individually, the coupling tolerance is very small, and it is difficult to achieve high yield and good performance. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a receiving optical device to overcome the shortcomings of the prior art.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A receiving optical device includes a Z-blcok component and multiple single-channel photoelectric conversion devices. On the light-emitting side of the Z-blcok component, a single-channel photoelectric conversion device is coupled at each corresponding optical channel. The single-channel photoelectric conversion devices between two adjacent optical channels are offset by more than 0.25 mm. All single-channel photoelectric conversion devices in even-numbered optical channels are aligned, and all single-channel photoelectric conversion devices in odd-numbered optical channels are aligned.
[0006] The beneficial effects of this invention are as follows: by arranging the single-channel photoelectric conversion devices with a stagger of more than 0.25mm, the optical crosstalk and electromagnetic crosstalk between adjacent optical channels are significantly reduced. All single-channel photoelectric conversion devices in even-numbered optical channels are aligned, and all single-channel photoelectric conversion devices in odd-numbered optical channels are aligned. The overall coverage area of all single-channel photoelectric conversion devices only increases by one staggered dimension. Each device in a single-channel photoelectric conversion device can be independently adjusted in position, thereby avoiding the impact on coupling tolerance due to the increasingly smaller photosensitive surface of the detector in the single-channel photoelectric conversion device, and making it easier to achieve high yield and good performance.
[0007] Based on the above technical solution, the present invention can be further improved as follows.
[0008] Furthermore, the single-channel photoelectric conversion device includes: a lens, a prism, a detector, and a limiting amplifier arranged sequentially along the light output direction of the Z-blcok component. The lens, prism, and detector are coupled sequentially, with the detector located below the prism and electrically connected to the limiting amplifier. The lens, prism, detector, and limiting amplifier between two adjacent optical channels are all offset by more than 0.25 mm.
[0009] The further beneficial effects of adopting the above are as follows: since the lenses and prisms of all channels do not share each other but exist independently, the position of the lenses and prisms in each optical channel can be adjusted individually compared to array lenses and array prisms. This avoids the coupling tolerance being affected by the increasingly smaller photosensitive surface of the detector, and makes it easier to achieve high yield and good performance.
[0010] Furthermore, the detector uses gold wire to electrically connect to the limiting amplifier.
[0011] Furthermore, the Z-blcok component is fixed to the first support, and the inlet side of the Z-blcok component is coupled to a collimator, which is also fixed to the first support.
[0012] Furthermore, the Z-blcok component uses a passive patch adhesive to fix the Z-blcok onto the first bracket, and the collimator is glued to the first bracket.
[0013] Furthermore, the first support is an L-shaped support.
[0014] Furthermore, the first bracket is fixed on the substrate, and a second bracket is fixed on the substrate. The lens and prism in the single-channel photoelectric conversion device are fixed on the second bracket, and the detector and limiting amplifier patch in the single-channel photoelectric conversion device are fixed on the substrate.
[0015] Furthermore, the substrate can be a printed circuit board, a ceramic substrate, a metal substrate, or a glass substrate. Attached Figure Description
[0016] Figure 1 This is a structural diagram of a receiver optical device in the prior art; Figure 2 This is a structural diagram of the receiving optical device in this utility model.
[0017] The attached diagram lists the components represented by each number as follows: 1. Z-blcok assembly; 2. Single-channel photoelectric conversion device; 210. Lens; 220. Prism; 230. Detector; 240. Limiting amplifier; 3. First support; 4. Collimator; 5. Substrate; 6. Second support. Detailed Implementation
[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0019] Example 1 like Figure 2 As shown, a receiving optical device includes: a Z-blcok component 1 and multiple single-channel photoelectric conversion devices 2. On the light-emitting side of the Z-blcok component 1, a single-channel photoelectric conversion device 2 is coupled at each corresponding optical channel. The single-channel photoelectric conversion device 2 can first converge the light emitted from a single optical channel of the Z-blcok component 1, then turn the horizontal light downward by 90°, then convert the optical signal into an electrical signal, and finally amplify and shape the electrical signal. The single-channel photoelectric conversion devices 2 between two adjacent optical channels are staggered by more than 0.25 mm, and all single-channel photoelectric conversion devices 2 in even-numbered optical channels are aligned, and all single-channel photoelectric conversion devices 2 in odd-numbered optical channels are aligned. By arranging the single-channel photoelectric conversion devices 2 with a stagger of more than 0.25mm, the optical crosstalk and electromagnetic crosstalk between adjacent optical channels are significantly reduced. All single-channel photoelectric conversion devices 2 in even-numbered optical channels are aligned, and all single-channel photoelectric conversion devices 2 in odd-numbered optical channels are aligned. The overall coverage area of all single-channel photoelectric conversion devices 2 only increases by one staggered dimension. Since there are no shared devices between each single-channel photoelectric conversion device 2 and the single-channel photoelectric conversion devices 2 in adjacent channels, all devices in each single-channel photoelectric conversion device 2 can be adjusted independently. This avoids the coupling tolerance being affected by the increasingly smaller photosensitive surface of the detector 230 in the single-channel photoelectric conversion device 2, making it easier to achieve high yield and good performance.
[0020] Example 2 like Figure 2 As shown, this embodiment is a further improvement on embodiment 1, as detailed below: The single-channel photoelectric conversion device 2 includes a lens 210, a prism 220, a detector (PD) 230, and a limiting amplifier 240. The lens 210, prism 220, detector 230, and limiting amplifier 240 are sequentially distributed along the light emission direction of the Z-blcok component 1. The lens 210 is coupled to the Z-blcok component 1, the prism 220 is coupled to the lens 210, and the detector 230 is coupled to the prism 220. The detector 230 is located below the prism 220. 30 is electrically connected to the limiting amplifier 240. In this scheme, the width of lens 210 (defined as the width along the light propagation direction) is consistent with the prior art, i.e., 0.5mm. The size of detector 230 is consistent with the prior art, i.e., 0.25mm × 0.25mm. The light emitted from one of the optical channels of Z-blcok component 1 is converged by lens 210 and then incident on prism 220. Then, prism 220 deflects the horizontal light downward by 90° and couples it into detector 230. The detector 230 converts the optical signal into an electrical signal, and then transmits the electrical signal to the limiting amplifier 240, which amplifies and shapes the electrical signal. The lenses 210 between two adjacent optical channels are offset by more than 0.25mm, the prisms 220 between two adjacent optical channels are offset by more than 0.25mm, and the detectors 230 between two adjacent optical channels are offset by more than 0.25mm to reduce optical crosstalk and electromagnetic crosstalk between adjacent channels. The limiting amplifiers 240 between two adjacent optical channels are offset by more than 0.25mm to reduce optical crosstalk and electromagnetic crosstalk between adjacent channels. Alternatively, it can be understood that the offset distance of the lenses 210 between two adjacent optical channels is A, where A is more than 0.25mm; the offset distance of the prisms 220 between two adjacent optical channels is B; the offset distance of the detectors 230 between two adjacent optical channels is C; and the offset distance of the limiting amplifiers 240 between two adjacent optical channels is D, and A=B=C=D.
[0021] Since the lenses 210 and prisms 220 of all channels do not share the same lens but exist independently, the position of the lenses 210 and prisms 220 in each optical channel can be adjusted individually compared to array lenses and array prisms. This avoids affecting the coupling tolerance due to the increasingly smaller photosensitive surface of the detector 230, making it easier to achieve high yield and good performance.
[0022] Furthermore, the detector 230 is electrically connected to the limiting amplifier 240 using a gold wire 250.
[0023] Example 3 like Figure 2 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below: The Z-blcok in the Z-blcok assembly 1 is fixed on the first support 3. The entrance side of the Z-blcok assembly 1 is coupled to a collimator 4, which is fixed on the first support 3. The collimator 4 makes the light from the optical fiber parallel and allows the parallel light to be coupled into the Z-blcok assembly 1.
[0024] Furthermore, the Z-blcok in the Z-blcok component 1 is fixed to the first bracket 3 using a passive patch adhesive, and the collimator 4 is fixed to the first bracket 3 using glue. The first bracket 3 is preferably an L-shaped bracket.
[0025] The first bracket 3 is fixed on the substrate 5, and a second bracket 6 is fixed on the substrate 5. The lens 210 and prism 220 in the single-channel photoelectric conversion device 2 are fixed on the second bracket 6, and the detector 230 and limiting amplifier 240 in the single-channel photoelectric conversion device 2 are patched and fixed on the substrate 5.
[0026] Substrate 5 is a printed circuit board, a ceramic substrate, a metal substrate, or a glass substrate.
[0027] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A receiving optical device, characterized by, include: The Z-blcok component (1) and multiple single-channel photoelectric conversion devices (2) are provided. On the light-emitting side of the Z-blcok component (1), a single-channel photoelectric conversion device (2) is coupled at each corresponding optical channel. The single-channel photoelectric conversion devices (2) between two adjacent optical channels are offset by more than 0.25 mm. All single-channel photoelectric conversion devices (2) in even-numbered optical channels are aligned, and all single-channel photoelectric conversion devices (2) in odd-numbered optical channels are aligned.
2. The receiving end optical device according to claim 1, wherein, The single-channel photoelectric conversion device (2) includes: a lens (210), a prism (220), a detector (230), and a limiting amplifier (240) arranged sequentially along the light output direction of the Z-blcok component (1). The lens (210), prism (220), and detector (230) are coupled sequentially. The detector (230) is located below the prism (220). The detector (230) is electrically connected to the limiting amplifier (240). The lens (210), prism (220), detector (230), and limiting amplifier (240) between two adjacent optical channels are all offset by more than 0.25 mm.
3. The receiving optical device according to claim 2, characterized in that, The detector (230) is electrically connected to the limiting amplifier (240) using a gold wire (250).
4. The receiving end optical device according to claim 2, wherein, The Z-blcok in the Z-blcok assembly (1) is fixed on the first support (3), and the inlet side of the Z-blcok assembly (1) is coupled to a collimator (4), which is fixed on the first support (3).
5. An optical receiver device according to claim 4, c h a r a c t e r i z e d in that The Z-blcok component (1) uses a passive patch adhesive to fix the Z-blcok to the first bracket (3), and the collimator (4) is glued to the first bracket (3).
6. The receiving end optical device according to claim 4, wherein, The first bracket (3) is an L-shaped bracket.
7. The receiving end optical device according to claim 4, wherein, The first bracket (3) is fixed on the substrate (5), and a second bracket (6) is fixed on the substrate (5). The lens (210) and prism (220) in the single-channel photoelectric conversion device (2) are fixed on the second bracket (6), and the detector (230) and limiting amplifier (240) in the single-channel photoelectric conversion device (2) are patched on the substrate (5).
8. An optical receiver device according to claim 7, characterized in that The substrate (5) is a printed circuit board, a ceramic substrate, a metal substrate, or a glass substrate.