Dynamic tunable optical multiplexer composed of tellurium dioxide acoustic-optical tunable filter

An optical add-drop multiplexer and tuning filter technology, which can be applied in wavelength division multiplexing systems, optical multiplexing systems, waveguide-type devices, etc., and can solve problems such as large size

Inactive Publication Date: 2007-02-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The device will make up for the defect of high line width of integrated devices and solve the problem of excessive volume of quasi-collinear tellurium dioxide devices

Method used

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  • Dynamic tunable optical multiplexer composed of tellurium dioxide acoustic-optical tunable filter
  • Dynamic tunable optical multiplexer composed of tellurium dioxide acoustic-optical tunable filter
  • Dynamic tunable optical multiplexer composed of tellurium dioxide acoustic-optical tunable filter

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Embodiment Construction

[0050] TeO converted from o-light to e-light 2 AOTF can realize the requirements of smaller line width, polarization maintenance and higher diffraction efficiency as an OADM device. figure 2 It is a schematic diagram of the system structure, and its working mechanism has both similarities and differences with the integrated AOTF. After the polarizing beam splitter PBS divides the incident light into o light and e light, the o light enters the TeO above in one optical path 2 AOTF (13), realizes filtering and mode conversion; another way enters the polarization converter (11) with e light, converts e light into o light, and then enters the following TeO with the same performance 2 AOTF (13) realizes filtering and mode conversion equally; The filtering signal (14) that comes out from two AOTFs (13) is e light, and 3dB coupler (16) respectively two-way filtering signal and two-way non-filtering long signal ( 15) Drop off or continue transmission after merging. In addition, the...

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Abstract

This invention relates to a dynamic adjustable light splitting multiplex made up of a TeO2 acousto-optic adjustable filter composed of a polarization beam splitter, two acousto-optic filters with the same structure and performance, a polarization converter and fibers, among which, the filter light beam is made in a large incident angle of 60deg~750deg, its mutual action length is larger than 4.5cm. The filter can get the line width smaller than 0.4nm, the device is less influenced by the crystal opticity so as to keep the light polarization state with rather low driving power and high diffraction efficiency, theoretical compute values are 180mw and 98%.

Description

technical field [0001] The invention relates to a novel acousto-optic tunable filter of tellurium dioxide, which can be used as a tunable filter in optical communication and a core device in an optical add / drop multiplexer. Background technique [0002] Acousto-optic tunable filter for communication is a new type of device developed in the past ten years. It has the characteristics of high diffraction efficiency, low driving power, large tuning range, dynamic reconfigurability and parallel processing. The acousto-optic tunable filter is processed by mechanically cutting a certain tangential lithium niobate sheet or tellurium dioxide crystal. [0003] In the past, the acousto-optic tunable filters that can be used as optical add-drop multiplexers are divided into integrated devices and tellurium dioxide devices. For an integrated device, it is composed of an interdigital transducer, an optical waveguide, an acoustic waveguide and two polarization beam splitters on an X-cut l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02H01P1/20H01P1/205H04J14/00
Inventor 刘维孙雨南崔建民崔芳班龙
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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