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Broadband wavelength bandwidth tunable filter based on cascaded interleaver

A technology of interleaver and filter, which is applied in the field of broadband wavelength and bandwidth adjustable filters, can solve the problems of AWG process error sensitivity and filter bandwidth adjustment, and achieve the effect of small device size, simple control, and continuously adjustable bandwidth

Inactive Publication Date: 2019-06-18
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at defects such as the inability to adjust the filter bandwidth in the prior art and the sensitivity of AWG to process errors, etc., and proposes a broadband wavelength bandwidth adjustable filter based on cascaded interleavers, which has a single resonance peak in a broadband (such as 20nm) , square filter spectrum, the advantages of continuously adjustable wavelength within a wide band and continuously adjustable bandwidth

Method used

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  • Broadband wavelength bandwidth tunable filter based on cascaded interleaver
  • Broadband wavelength bandwidth tunable filter based on cascaded interleaver
  • Broadband wavelength bandwidth tunable filter based on cascaded interleaver

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Embodiment Construction

[0014] Such as figure 1 with figure 2 As shown, this embodiment includes: two cascaded interleavers, wherein: the first-stage interleaver is assisted by a 2-ring MZI to implement wavelength bandwidth adjustment, and the second-stage interleaver is assisted by a 2-ring MZI to implement wavelength adjustment.

[0015] The transfer function of the broadband wavelength bandwidth tunable filter is: T=T 1 T 2 , Among them: T 1 and T 2 The transfer function of one output port of the first-stage and second-stage interleaver respectively, A i and t i , where i=1~4, corresponding to the transfer functions of the four single loops and the transfer coefficient of the directional coupler; Among them: k=1~6, that is, the length is l k The transmission rate of the waveguide, α and β are the loss coefficient and propagation constant of the waveguide respectively, j is the imaginary unit; t 1 ~t 4 They are 0.5, 0.5, 0.785, 0.243 respectively.

[0016] The cavity length of all s...

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Abstract

The invention discloses a broadband wavelength and bandwidth-tunable filter based on cascaded interleavers, which comprises at least two cascaded interleavers, wherein the interleaver in each stage is formed by a micro loop-assisted MZI; one end of one arm of two single rings of a first-stage interleaver for realizing tunability on the wavelength and the bandwidth and switching of a complementary spectrum serves as an input end, and the other end is connected with one end of one arm without pi phase shifting of a second-stage interleaver for realizing tunability on the wavelength and switching of a complementary spectrum; and the other end of one arm without pi phase shifting of the second-stage interleaver is an output end. The broadband wavelength bandwidth-tunable filter based on cascaded interleavers has the advantages of single resonant peak within a broadband (such as 20 nm), square filtering spectrum, continuously tunable wavelength in the broadband and continuously tunable bandwidth.

Description

technical field [0001] The invention relates to a technology in the field of optical fiber communication, in particular to a broadband wavelength-bandwidth tunable filter based on a cascaded interleaver. Background technique [0002] Silicon-based photonic devices have the advantages of strong mode field confinement characteristics and compatibility with CMOS processes, and are ideal for integrated optical circuits. Silicon-based photonic devices mainly include filters, modulators, optical switches, routers, and detectors. In reconfigurable optical add-drop multiplexing, four important features are CDCG (colorless colorless, directionless non-directional, contentionless non-blocking and gridless non-grid). In order to achieve colorless and gridless, it is necessary to design a broadband optical filter with adjustable wavelength and bandwidth. The device needs to have four characteristics: a single resonance peak in the broadband, a square filter spectrum, continuously adjus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293
CPCG02B6/29347
Inventor 姜新红张红霞张永邱辞源苏翼凯
Owner SHANGHAI JIAOTONG UNIV
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