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Structure for wavelength selection switch

A wavelength selective switch and wavelength technology, applied in the field of WSS structure, can solve the problems of reducing PDL, large polarization-related loss, etc., and achieve the effect of avoiding polarization control, reducing design links, reducing cost and debugging complexity

Inactive Publication Date: 2011-10-26
孙方红 +2
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  • Claims
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AI Technical Summary

Problems solved by technology

In the above free space technical solution, due to the different dispersion of the gratings for each wavelength, the wavelength selective switch has a large polarization-dependent loss (PDL), and it is usually necessary to use an additional polarization control element to control the polarization state of the wavelength selective switch. , to reduce the PDL

Method used

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  • Structure for wavelength selection switch
  • Structure for wavelength selection switch
  • Structure for wavelength selection switch

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Embodiment Construction

[0021] The present invention proposes a wavelength selective switch structure, which includes a collimator array 1, a beam expander prism group 2, a polarization-independent transmissive phase grating 3, a focusing lens 4, and a MEMS micromirror array 5 composition (see figure 1 and figure 2 ). The volume of the wavelength selective switch can be reduced by adding a reflector 6 and a turning prism 7 in the optical path (see image 3 ). Such as figure 2 As shown in the side view, one port in the collimator array 1 is used as an input port, and the other 4 ports are used as output ports. The input DWDM beam is converted into an elliptical beam by the beam expander prism group 2, and then the beams of different wavelengths are diffracted by the polarization-independent transmissive phase grating 3 into different deflection angles, focused by the focusing lens 4, and incident on the MEMS chip 5. On the micromirror, each micromirror independently controls the reflection dire...

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Abstract

The invention relates to a structure for a wavelength selection switch composed of a collimator array 1, a beam-expanding prism group 2, a polarization independent transmission phase grating 3, a focusing lens 4 and an MEMS (Micro-electromechanical System) micro-mirror array 5. The volumes of the devices can be reduced by adding a reflector 6 or a steering prism 7 in an optical path. One of the collimator array 1 is used as an input port while the others are used as output ports; DWDM (Dense WaveLength Division Multiplexing) light beams are input and converted to elliptical light beams via the beam-expanding prism group 2, then the light beams with different wavelengths are diffracted to be different deflection angles via the polarization independent transmission phase grating 3, focused by the focusing lens and emitted to different micro-mirrors on the MEMS micro-mirror array 5; each micro-mirror independently controls the reflection direction of every wavelength; the light beams are output to the target output port in the collimator array 1 through the focusing lens 4, the polarization independent transmission phase grating 3 and the beam-expanding prism group 2.

Description

technical field [0001] The present invention relates to a wavelength optical switching device, that is, a wavelength selective switch (WSS), more precisely, the present invention relates to a WSS structure based on MEMS technology. It can be used in the node equipment of the all-optical communication network. It belongs to the field of optical devices in optical fiber communication. Background technique [0002] Optical fiber communication is developing from the current point-to-point transmission to an intelligent and dynamic all-optical communication network. The key device, and the wavelength selective switch is an effective technical way to form ROADM and OXC. [0003] When the wavelength selective switch port is configured as 1×N (that is, 1 port input, N port output), for the input dense wavelength division multiplexing (DWDM) optical signal, any one or any group of wavelengths can be switched to N in any of the output ports. The implementation method of the wavele...

Claims

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Application Information

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IPC IPC(8): G02B6/293
Inventor 孙方红朱红孙睿玲
Owner 孙方红
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