Tunable photonic crystal filters for optical network opm modules

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

Active Publication Date: 2016-09-21
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 filters for optical network opm modules
  • Tunable photonic crystal filters for optical network opm modules
  • Tunable photonic crystal filters for optical network opm modules

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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 1533.276nm to 1556.138nm, 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 1533.2915nm to 1556.1331nm, 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 used to form an optical channel performance monitoring module of a wavelength division multiplexing (WDM) system. Tunable photonic crystal filter for optical network OPM module, including linear motor, first photonic crystal mounted on linear motor stator, second photonic crystal mounted on linear motor rotor, first photonic crystal and second photonic The air layer between the crystals. Compared with the diffraction filter, the filter of the present invention narrows the optical path and reduces too many optical elements, thereby greatly saving space, and is not prone to aging phenomenon, and the film thickness deviation of 10% will not affect its bandgap characteristics.

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 Patents(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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