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Wavelength division receiving device

A receiving device and wavelength division technology, applied in the coupling of optical waveguides, etc., can solve the problems of inability to directly match the array chip, long working distance of the optical path, high precision requirements, etc., to increase the degree of integration, reduce chip cost, packaging Small size effect

Pending Publication Date: 2022-07-12
WUHAN HUAGONG GENUINE OPTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the Z-block spatial optical path splitting method is affected by diaphragm cutting and assembly, and cannot be directly matched to 0.25mmpitch array chips. It can only be matched to 750um pitch chips. 0.25mm pitch chips save 3 times the material and reduce the cost by 2 / 3
CN109613663 A describes a coupling optical path that adopts a combination of a pitch-reducing turning prism and a Clens. This optical path has a very long working distance. From the optical fiber output point to the PD photosensitive surface, the actual space length is 20-25mm. The precision of the turning prism is high, and it is difficult to realize this kind of optical path in the BOX device with limited space

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: see figure 1 and figure 2 , the first prism 5 and the second prism 6 are both right-angled trapezoids, and the angle between the hypotenuse and the long base of the first prism 5 and the second prism 6 is controlled at 55-65 ° between. Preferably, the angle a is optimal when it is 60 degrees. In this embodiment, the 750 μm pitch can be reduced to 250 μm pitch. Z-block3 pitch (height) is 750um. At this time, the curvature radius of the cylindrical lens 4 may be 8 mm. The cylindrical lens 4 can be bonded and coupled with the first prism 5, or can be separated; after the light beam is divided into 4 beams by the Z-block 3, it first passes through the cylindrical lens 4, then passes through the first prism 5 and the second prism 6, and reaches the vertical turning prism. 7, and then go to PD lens array8 to focus on PD array9. Preferably, the material of the two prisms is N-SF11, and the shapes of the two prisms are the same, and at most they are only diffe...

Embodiment 2

[0034] Example 2: see image 3 and Figure 4, the first prism 5 is a right-angled trapezoid, the second prism 6 is a right-angled triangle, and the angle between the hypotenuse and the long base of the first prism 5 is controlled between 68° and 74°. One of the right-angled sides of the second prism 6 is attached to the oblique side of the first prism 5 . Preferably, the angle c is optimal when it is 78.2°, and the key point of the second prism 6 is that it is a right-angled trapezoid. In this embodiment, the 750μm pitch can be reduced to 250μmpitch. Z-block3 pitch (height) is 750um. At this time, the curvature radius of the cylindrical lens 4 may be 8 mm. The cylindrical lens 4 can be bonded and coupled with the first prism 5, or can be separated; after the light beam is divided into 4 beams by the Z-block 3, it first passes through the cylindrical lens 4, then passes through the first prism 5 and the second prism 6, and reaches the vertical turning prism 7 , and then to...

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Abstract

The invention relates to the technical field of optical fiber communication high-speed optical modules, and provides a wavelength division receiving device which comprises a collimation pin, a Z-block, a cylindrical lens, a prism assembly and a vertical turning prism which are sequentially arranged in the direction of an optical path. According to the wavelength division receiving device, the light emitting height is reduced for multiple times through the prism assembly, the wavelength division receiving device can be directly matched with a receiving optical device of a coupling optical path used by a PD array with 0.25 mm pitch, the actual device size can be reduced to a great extent, the spatial length is 10-15 mm, the integration level of a system can be increased, and the chip cost is reduced; the device is small in packaging size, easy to operate, large in coupling tolerance, low in coupling difficulty and easy to produce in batches.

Description

technical field [0001] The invention relates to the technical field of high-speed optical modules for optical fiber communication, in particular to a wavelength division receiving device, which is based on a receiving optical path assembly or BOX device packaged in COB or BOX, and can be used for CWDM, LANWDM, etc. in optical devices or optical modules. Background technique [0002] In optical communication high-speed devices, the chip cost accounts for a high proportion of the total device cost. In order to reduce costs and increase integration, array PDs and TIAs with high integration are usually used in receiving devices or optical circuits, and the pitch is generally 0.25mm or 0.75mm. , the higher the integration, the cheaper the chip. [0003] For CWDM and LAN WDM receiving devices, wavelength division is required. At present, the Z-block space optical path is commonly used in the industry—prism + filter diaphragm combination demultiplexing. MZ, etc., among which Z-bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/42
CPCG02B6/4204G02B6/4215G02B6/4206G02B6/4214
Inventor 钟幸刘栋迟景茂罗传能李梓文
Owner WUHAN HUAGONG GENUINE OPTICS TECH