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Optical filtering device based on silicon-based double-Sagnac-loop-mirror loop structure

A technology of Sagnac ring mirror and optical filter device, which is applied in the direction of optical components, light guides, optics, etc., and can solve the problems of not being able to achieve high extinction ratio

Inactive Publication Date: 2016-05-11
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the transfer function of the device has no zero point and cannot achieve a high extinction ratio

Method used

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  • Optical filtering device based on silicon-based double-Sagnac-loop-mirror loop structure
  • Optical filtering device based on silicon-based double-Sagnac-loop-mirror loop structure
  • Optical filtering device based on silicon-based double-Sagnac-loop-mirror loop structure

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Embodiment 1

[0034] Such as figure 1 As shown, the present embodiment includes: two Sagnac loop mirrors SLM and a directional coupler, wherein: the SLM and the coupler are connected in series to form a double Sagnac loop mirror loop structure, and the waveguide lengths after connection are respectively 1 1 , l 1 and l 3 , one side of the directional coupler is provided with an input port I, a transmission port T and a reflection port R. The coupling coefficients of the three couplers are t 1 , t 2 and t 3 .

[0035] Described SLM refers to connecting the ports on the same side of the directional coupler, and its waveguide length is l 2 , and the two ports on the other side are used as the input and output ports of the optical device, which guides the light into the input port and reflects it back to the input port. A directional coupler is an optical device that consists of two adjacent parallel waveguides and realizes optical power distribution through evanescent field coupling.

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Abstract

An optical filtering device based on a silicon-based double-Sagnac-loop-mirror loop structure comprises two Sagnac loop mirrors and a directional coupler, wherein waveguides on one side of the two Sagnac loop mirrors are connected, waveguides on the other side are respectively connected with two waveguides on one side of the directional coupler, and an input port, a transmission port and a reflection port are arranged at the other side of the directional coupler. According to the invention, the coupling coefficient of each coupler and the length of each waveguide are adjusted, and the transmission function and the reflection function of the double-Sagnac-loop-mirror loop structure can be changed, so that an interleaver adjustable in wavelength and a comb filter adjustable both in wavelength and bandwidth are realized; in addition, the size is small, the adjusting efficiency is high, and the extinction ratio is high.

Description

technical field [0001] The invention relates to a technology in the field of optical fiber communication, in particular to an optical filter device based on a silicon-based double-Sagnac loop-mirror loop structure. Background technique [0002] Silicon-based photonic devices have the characteristics of strong mode field confinement and are compatible with complementary metal-oxide-semiconductor CMOS processes, making them ideal for integrated optical circuits. Silicon-based photonic devices mainly include filters, modulators, optical switches, routers, and detectors. In reconfigurable networks, tunable filters are an important class of devices, including wavelength tunable interleavers and tunable comb filters. [0003] After searching the existing technology, Junfeng Song et al. published the paper "Proposed silicon wire interleaverstructure" in OpticsExpress, Volume 16, Issue 11 in 2008, and proposed a ring interleaver based on the add-drop multiplexing ring resonator ADR...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293
CPCG02B6/29317G02B6/2932G02B6/29347
Inventor 姜新红苏翼凯
Owner SHANGHAI JIAO TONG UNIV
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