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Wavelength selection switch and wavelength selection method

A wavelength selective switch and wavelength selection technology, which is applied in the field of optical communication, can solve the problems of increasing the complexity of the optical path and increasing the cost, and achieve the effects of simplifying the optical path, reducing insertion loss, and reducing costs

Active Publication Date: 2013-10-16
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology

This will increase the complexity of the optical path, bring insertion loss (about 0.5dB), and increase the cost

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  • Wavelength selection switch and wavelength selection method
  • Wavelength selection switch and wavelength selection method
  • Wavelength selection switch and wavelength selection method

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Embodiment Construction

[0019] Blue-phase liquid crystals are liquid crystal materials having a self-assembled structure of twisted double helices. Blue-phase liquid crystal molecules can spontaneously assemble to form a three-dimensional structure with optical isotropy, without birefringence caused by other types of liquid crystals, and thus can realize modulation of non-polarized light. In addition, the unique optical isotropy and Kerr effect of blue phase liquid crystals can also reduce insertion loss, and the response time of blue phase liquid crystals to change from optical isotropic state to optical anisotropic state is less than 1ms, which is faster than that of ordinary liquid crystals. The corresponding rate is an order of magnitude faster. Based on the above advantages of blue-phase liquid crystals, the inventors propose a wavelength selective switch based on a blue-phase liquid crystal device and a corresponding wavelength selection method according to an embodiment of the present inventio...

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Abstract

The invention provides a wavelength selection switch and a wavelength selection method. The wavelength selection switch comprises an input port, a wavelength separation device, and at least one output port. Specifically, the input port is used for realizing incidence of a light beam having a plurality of optical signals with different wavelengths through the port. The wavelength separation device including a blue-phase liquid crystal device is configured to separate at least one optical signal from the beam by using the blue-phase liquid crystal device. And the at least one output port is configured to respectively output the at least one optical signal that is separated by the wavelength separation device. According to the wavelength selection switch and the wavelength selection method, phase modulation free of polarization can be realized and there is no need to arrange a polarization eliminating device at a light path, thereby simplifying the light path and reducing the insertion loss and thus lowering the cost of the wavelength selection switch and the whole optical communication system.

Description

technical field [0001] The present invention relates to optical communication technology, and in particular to a wavelength selection switch for optical communication and a corresponding wavelength selection method. Background technique [0002] Wavelength division multiplexing (WDM) is a common optical layer networking technology at present. By multiplexing different wavelengths for transmission in one optical fiber, it is easy to achieve a transmission capacity of Gbit / s or even Tbit / s. Reconfigurable Optical Add-Drop Multiplexer (ROADM), as the core optical switching device in WDM network, can configure any wavelength on any port. Wavelength Selective Switch (WSS) is a new generation technology used to realize dynamically reconfigurable optical add-drop multiplexer, which has the function of selecting and outputting specific wavelengths from input wavelengths. [0003] The WSS based on Liquid Crystal on Silicon (LCOS) can realize flexible and adjustable channel center fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293G02B6/34G02B6/32
CPCH04Q2011/0026H04Q2011/0032H04Q11/0005H04Q2011/0022
Inventor 尤全谢德权刘子晨邱英李淼峰杨奇
Owner WUHAN POST & TELECOMM RES INST CO LTD
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