Band-pass type tunable optical filter array

An optical filter and optical fiber array technology, which is applied in the coupling of optical waveguides, instruments, optical guides, etc., can solve the problems that tunable optical filters cannot simultaneously meet the requirements of array integration, flat passband characteristics and gridless tuning.

Inactive Publication Date: 2014-04-09
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] The invention provides a band-pass tunable optical filter array, which solves the problem that the existing tunable optical filter cannot satisfy array integration, flat pass-band characteristics and gridless tuning at the same time

Method used

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  • Band-pass type tunable optical filter array
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  • Band-pass type tunable optical filter array

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing and embodiment the present invention is further described:

[0041] figure 1 and figure 2 In , the solid black arrow indicates the forward light, the hollow arrow indicates the reverse light corresponding to the passband, and the arrow indicates the reverse light corresponding to the stop band;

[0042] Such as figure 1 and figure 2 As shown, the embodiment of the present invention includes an optical fiber array 11, a microlens array 12, a polarization conversion assembly 13, a beam expander prism 14, a cylindrical mirror 15, a diffraction grating 16, a Fourier lens 17 and Liquid crystal on silicon chip (LCOS chip) 18, characterized in that:

[0043] The optical fiber array 11 receives broadband optical signals from M external ports, collimates them into M channels of randomly polarized collimated beams independent of each other through the microlens array 12, sends them to the polarization conversion component 13, a...

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Abstract

The invention provides a band-pass type tunable optical filter array and belongs to tunable optical filters, wherein the band-pass type tunable optical filter array solves the problem that existing tunable optical filters cannot simultaneously meet the requirements for array integration, flat pass-band characteristics and grid-free tuning. The band-pass type tunable optical filter array comprises an optical fiber array, a micro-lens array, a polarization transformation assembly, a beam expanding prism, a cylindrical lens, a diffraction grating, a Fourier lens and an LCOS chip which are arranged on an optical path in sequence. The band-pass type tunable optical filter array is based on the LCOS chip, the free space optics structure is adopted, the structures and parameters of the micro-lens array, the prim, the cylindrical lens, the lens and other optical elements are designed appropriately, pixel regions of the LCOS chip are partitioned and arranged reasonably, and therefore the band-pass type tunable optical filter array is simple and compact in structure, supports wavelength grid-free tuning design, planarization design of pass-band characteristics and array integration design, has good heat stability and polarization stability, meets development requirements of next-generation all-optical networks, and can be widely applied to an optical fiber communication system.

Description

technical field [0001] The invention belongs to tunable optical filters, in particular to a band-pass tunable optical filter array, which can be widely used in optical fiber communication systems. Background technique [0002] With the development and maturity of high-output power light source, high-speed modulation technology, broadband optical amplification technology, dense wavelength division multiplexing, time division multiplexing, optical soliton transmission and other technologies, optical communication systems are moving towards high-speed, ultra-large capacity, ultra-long The distance and the direction of all-optical network development. On optical fiber transmission lines, the use of dense wavelength division multiplexing technology is the main method for the expansion of the telecommunications industry; and in the switching nodes of the all-optical network, reconfigurable optical add-drop multiplexing (ROADM) technology is used to overcome the optical-electrical-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293G02B6/32G02B6/34G02B6/27G02F1/29
Inventor 万助军万琼刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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