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Tunable photonic crystal filter for optical network OPM module

A photonic crystal and optical network technology, applied in the field of optical communication, can solve the problems of channel interference, low precision, large volume, etc., and achieve the effect of avoiding interference between channels, reducing optical loss, and narrowing the optical path.

Active Publication Date: 2014-11-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: how to provide a tunable photonic crystal filter for optical network OPM modules to solve the problems of large volume, low precision and channel interference in current OPM modules

Method used

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  • Tunable photonic crystal filter for optical network OPM module
  • Tunable photonic crystal filter for optical network OPM module
  • Tunable photonic crystal filter for optical network OPM module

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Embodiment 1

[0023] In this embodiment, the structure is (GaAs / MgF 2 ) 3 / Air / (GaAs / MgF 2 ) 3 As the core component of the OPM module, the tunable photonic crystal filter has a lattice constant of 397nm, the thickness of each layer of GaAs is 114nm, and the thickness of each layer of MgF 2 The layer thickness was 283 nm.

[0024] The growth of the photonic crystal needs the support of the substrate, and the two same first photonic crystal 1 and the second photonic crystal 2 constituting the filter are slightly different when grown on the substrate, and the growth sequence is reversed. Vacuum coating machine on SiO 2 A 114nm GaAs layer is deposited on the substrate 3, and then a 283nm MgF layer is deposited on the GaAs layer 2 layer, to obtain a cycle of the first photonic crystal 1, so that a total of 3 cycles of alternate deposition are completed to complete the preparation of the first photonic crystal 1; 2 Deposit 283nm MgF on substrate 3 2 layer, then the MgF 2 A GaAs layer of ...

Embodiment 2

[0027] In this embodiment, the structure is (GaAs / MgF 2 ) 4 / Air / (GaAs / MgF 2 ) 4 As the core component of the OPM module, the tunable photonic crystal filter has a lattice constant of 397 nm, a thickness of each GaAs layer of 114 nm, and each layer of MgF 2 The layer thickness is 283 nm.

[0028] Each of the first photonic crystal 1 and the second photonic crystal 2 needs to be deposited for 4 cycles, and the specific preparation method is the same as that in Embodiment 1.

[0029] When the thickness of the air layer changes from 370.8 nm to 392.8 nm, such as Figure 5 , the corresponding transmission peak wavelength moves from 1533.276 nm to 1556.138 nm, the wavelength accuracy reaches 1 pm, and the transmittance is above 99%. Figure 8 It can be seen that the thickness of the air layer has a linear relationship with the peak wavelength, Figure 9 It shows that its average half maximum width is 0.7 nm.

Embodiment 3

[0031] In this embodiment, the structure is (GaAs / MgF 2 ) 5 / Air / (GaAs / MgF 2 ) 5 As the core component of the OPM module, the tunable photonic crystal filter has a lattice constant of 397 nm, a thickness of each GaAs layer of 114 nm, and each layer of MgF 2 The layer thickness is 283 nm.

[0032] The first photonic crystal 1 and the second photonic crystal 2 each need to be deposited for 5 cycles, and the specific preparation method is the same as that in Embodiment 1.

[0033] When the thickness of the air layer changes from 370.8 nm to 392.8 nm, such as Figure 6 , the corresponding transmission peak wavelength moves from 1533.2915 nm to 1556.1331 nm, the wavelength accuracy reaches 0.1 pm, and the transmittance is above 99%. Figure 8 It can be seen that the thickness of the air layer has a linear relationship with the peak wavelength, Figure 9 It shows that its average half maximum width is 0.12 nm.

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Abstract

The invention relates to the field of optical communication, in particular to a tunable photonic crystal filter for an optical network OPM module. The tunable photonic crystal filter for the optical network OPM module is used for constituting a wavelength division multiplexing (WDM) system optical channel performance monitoring module. The tunable photonic crystal filter comprises a linear motor, a first photonic crystal mounted on the stator of the linear motor, a second photonic crystal mounted on the rotor of the linear motor and an air layer between the first photonic crystal and the second photonic crystal. Compared with a diffraction filter, the filter provided by the invention has the advantages as follows: the optical path is shortened, and excessive optical elements are reduced, therefore, the space is saved greatly, the aging phenomenon is not easy to happen, the deviation of film thickness is 10%, and forbidden band characteristics are not influenced.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a tunable photonic crystal filter used to form an optical channel performance monitoring module of a wavelength division multiplexing (WDM) system. Background technique [0002] With the advancement of communication technology, people's increasing demand for information services requires greater network capacity to meet. The WDM system has certain advantages in realizing large-capacity data transmission, but the continuous growth of the transmission rate in this system also brings many challenges to the transmission of optical signals, such as nonlinear problems such as four-wave mixing in optical fiber transmission, and environmental factors. Make the optical signal shift or distort, etc., these effects will lead to the degradation of the service quality of the WDM system. OPM can monitor optical signals, feed back information in time, and flexibly correct channels, so that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02B1/00G02B26/00
Inventor 杨毅彪刘欣张杨邹泽华费宏明李琳
Owner TAIYUAN UNIV OF TECH
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