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Novel cascade type microsphere cavity filter

A filter and cascaded technology, which is applied in the field of new cascaded microsphere cavity filters, can solve the problems of increased difficulty in optical detection, strong dependence, narrow bandwidth, etc., and achieves low cost of production materials and is conducive to integration , making simple effects

Pending Publication Date: 2022-05-31
SHAANXI RAILWAY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the series micro-ring resonator filter has different light transmission directions depending on whether the number of rings is odd or even.
In parallel microring resonant filters, when the number N of microrings increases from small to large, the main resonant peak changes from convex to flat, the bandwidth narrows, the side lobes increase, and the sub-resonant peak increases, making the non-resonant light stronger. Causes interference signal enhancement, making optical detection more difficult
Moreover, the processing of the disk cavity is a new process explored in recent years. Through chemical etching, the smoothness is not enough and the quality factor Q is low.

Method used

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  • Novel cascade type microsphere cavity filter
  • Novel cascade type microsphere cavity filter
  • Novel cascade type microsphere cavity filter

Examples

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Embodiment Construction

[0020] A novel cascaded microsphere cavity filter of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0021] figure 1 It is a block diagram of the series cascaded microsphere resonator filter system, figure 2 It is a coupled package structure diagram of a series cascaded microsphere resonator. In the figure, the filter includes: broadband laser 1, EDFA erbium-doped fiber amplifier 3, erbium-doped microspheres 8, tapered fiber 5, optical coupler 6; broadband laser 1 is connected to the input end 2 of EDFA erbium-doped fiber amplifier 3 , the output end 4 of the EDFA erbium-doped fiber amplifier 3 is connected to a main road optical fiber 7 . The end of the main road optical fiber 7 is connected in series with three groups of tapered optical fibers 5, and each group of tapered optical fibers 5 is connected with an optical coupler 6, and the taper region on each group of tapered optical fibers 5 is ...

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Abstract

The invention provides a novel cascaded microsphere cavity filter. The filter comprises a broadband laser, an EDFA (erbium-doped fiber amplifier), erbium-doped microspheres, a tapered fiber and an optical coupler, the broadband laser is connected with the input end of the EDFA erbium-doped optical fiber amplifier, the output end of the EDFA erbium-doped optical fiber amplifier is connected with at least one optical fiber, the tail end of each optical fiber is connected with a tapering optical fiber, an erbium-doped microsphere is fixed on the tapering optical fiber, and laser in the erbium-doped microsphere is coupled with the tapering optical fiber and then is selected, superposed and output through the optical coupler. According to the novel cascaded microsphere cavity filter provided by the invention, light with different wavelengths is subjected to mode selection in the resonant cavity, so that effective filtering can be realized. The filter is small in size, so that the filter is more beneficial to integration, and meanwhile, the coupling packaging structure is compact, low in manufacturing material cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of laser filters, in particular to a novel cascaded microsphere cavity filter. Background technique [0002] With the development of communication technology, optical communication network needs to continuously improve working performance and reduce operating cost. The core technology lies in the miniaturization, integration, scale and high precision of optical waveguide devices. Future all-optical networks urgently need new optical waveguide devices that can achieve multiple functions and high efficiency. Among them, the series micro-ring resonator filter has different light transmission directions depending on whether the number of rings is odd or even. In parallel microring resonant filters, when the number of microrings N increases from small to large, the main resonant peak changes from convex to flat, the bandwidth narrows, the side lobes increase, and the sub-resonant peak rises, making the non-reson...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293
CPCG02B6/29341G02B6/2938
Inventor 安盼龙赵瑞娟王语园惠亮亮解晨姜留涛李晓艳
Owner SHAANXI RAILWAY INST
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