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Optical circuit board, optical device, and alignment method

A circuit substrate and circuit technology, applied in the directions of light guides, optics, optical components, etc., can solve the problems of inability to align, observe, and enlarge the size of the optical circuit substrate, so that the manufacturing cost will not increase, and the alignment accuracy and loss will not be increased. The effect of increased sensitivity

Active Publication Date: 2019-06-14
NTT ELECTORNICS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem in Patent Document 1 is that the alignment optical waveguide must be arranged along the main circuit from one end of the optical circuit substrate to the other end, so the size of the optical circuit substrate becomes larger, or the main circuit part where the optical components are arranged becomes smaller
Therefore, there is a problem that when the optical circuit substrate is mounted on the package structure and connected to the optical fiber array, the alignment optical fiber coupled from the alignment optical fiber of the optical fiber array to the alignment optical waveguide of the optical circuit substrate The light is blocked by the wall inside the package structure, and cannot be observed through the photodiode (PD) arranged outside, so that it cannot be aligned (refer to figure 1 )
However, there is a problem that in the process of mounting the optical circuit board on the package structure, the optical fiber array connected to the optical circuit board becomes an obstacle, resulting in poor mounting operation efficiency.

Method used

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  • Optical circuit board, optical device, and alignment method
  • Optical circuit board, optical device, and alignment method
  • Optical circuit board, optical device, and alignment method

Examples

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Embodiment approach 1

[0041] Figure 4 It is a figure for demonstrating the optical circuit board 101 of this embodiment. The optical circuit board 101 functionally includes two regions (the functional circuit part 11 and the waveguide part 12).

[0042] A functional circuit such as an AWG or an optical component 13 is connected to the functional circuit unit 11 through a waveguide 14 , and the waveguide 14 is connected to the signal port 22 via the input / output optical waveguide 16 of the waveguide unit 12 . An input / output optical waveguide 16 and a loopback circuit 15 are formed in the waveguide section 12 . One end of the input / output optical waveguide 16 is connected to the waveguide 14 , and the other end is connected to the signal port 22 .

[0043] The loopback circuit 15 includes a ring waveguide and a relay waveguide, and the relay waveguide is connected to the centering port 21 . The signal port 22 and the alignment port 21 are formed on the end surface of the optical circuit board 10...

Embodiment approach 2

[0051] Figure 6 It is a figure for demonstrating the optical device 301 of this embodiment. The optical device 301 connects the fiber array 201 to Figure 4 The optical circuit substrate 101 described in . In the optical fiber array 201, the signal optical fibers 32 arranged at the intervals of the signal ports 22 of the optical circuit substrate 101 and the alignment optical fibers 31 arranged at the positions of the alignment ports 21 of the optical circuit substrate 101 pass through the V-groove substrate and the press. The cover substrate is fixed, the ends of the signal optical fibers 32 are in contact with the signal ports 22 , and the ends of the alignment optical fibers 31 are in contact with the alignment ports 21 .

[0052] When the optical device 301 is manufactured, the optical circuit substrate 101 and the optical fiber array 201 must be aligned. The alignment method at this time includes: a temporary connection process of connecting the optical circuit substr...

Embodiment approach 3

[0056] Figure 7 It is a figure for demonstrating the optical device 302 of this embodiment. In the optical device 302 , the optical fiber array 202 is connected and fixed to the optical circuit substrate 102 . Optical circuit substrate 102 with Figure 4 The difference between the optical circuit substrate 101 of the optical circuit substrate 102 is that the optical waveguide 16 and the loopback circuit 15 of the optical circuit substrate 102 are arranged with an inclination angle (θ) relative to the vertical direction of the surface on which the signal port 22 and the alignment port 21 are arranged. . Corresponding to the oblique arrangement of the optical waveguide 16 and the loopback circuit 15, the alignment optical fiber 31 and the signal optical fiber 32 of the optical fiber array 202 are also obliquely connected. The alignment method at the time of connection is the same as that described in Embodiment 2.

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PUM

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Abstract

The purpose of the present invention is to provide a low-cost optical circuit board with which it is possible to align with a fiber array while mounted on a package and reduce size without affecting the main circuit section, and to also provide an optical device and an alignment method. This optical circuit board has a loop-back circuit mounted thereon, which returns aligning light in the vicinityof a fiber array connection end to the fiber array. Since an aligning loop-back circuit can be thus formed in an optical waveguide pattern, production costs do not increase in comparison to conventional optical circuit boards. Aligning light that links from an optical fiber to an aligning port of the optical circuit board is returned to the optical fiber via the loop-back circuit. Therefore, alignment is possible using said returned light. In other words, alignment is possible while mounted on a package without having to install a light-reflecting film or mirror.

Description

technical field [0001] The present invention relates to an optical circuit board on which an optical waveguide is formed, an optical device connecting the optical waveguide to an optical fiber, and an alignment method for connecting the optical circuit board and the optical fiber used in optical control devices such as optical communication. Background technique [0002] In an optical device in which an optical circuit board formed with an optical waveguide is connected to an optical fiber, in addition to the main circuit part that realizes the control function necessary for optical control, there is also an optical waveguide for alignment ( For example, refer to Patent Document 1). The optical waveguide for centering with a simple structure can be freely designed without depending on the functional configuration of the main circuit, and by connecting the optical fiber array with the optical fiber at the position corresponding to the input and output ports of each optical wa...

Claims

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Application Information

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IPC IPC(8): G02B6/122G02B6/30
CPCG02B6/125G02B6/30G02B6/4222G02B6/4225G02B6/122G02B6/132
Inventor 中西智浩南元树今野悟铃木雄一佐藤照明长岛茂雄美野真司石井元速相马俊一亀井新浅川修一郎
Owner NTT ELECTORNICS CORP