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Frequency spectrum mode field radius matching method in mode conversion based on spatial frequency spectrum filtering

A technology of spatial spectrum filtering and mode conversion, applied in the field of space division multiplexing optical fiber communication system

Active Publication Date: 2014-05-21
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] At present, there are two main modes of mode conversion: the spatial optical path type and the fiber waveguide type, but they mainly focus on the mode conversion methods from the fundamental mode to the high-order mode and from the high-order mode to the fundamental mode, and the conversion method between arbitrary modes is still under study.

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  • Frequency spectrum mode field radius matching method in mode conversion based on spatial frequency spectrum filtering
  • Frequency spectrum mode field radius matching method in mode conversion based on spatial frequency spectrum filtering
  • Frequency spectrum mode field radius matching method in mode conversion based on spatial frequency spectrum filtering

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[0018] The advantages and features of the present invention, as well as the method of carrying out the present invention, may be more readily understood by referring to the following detailed description of exemplary, non-limiting embodiments and accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims. Throughout the specification, the same reference numerals designate the same parts.

[0019] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] figure 1 A block diagram of the spatial spectrum filtering system is schematically shown. The invention designs a mo...

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Abstract

Mode conversion is a key technology of a mode division multiplexing optical fiber communication system, and a conversion method between two arbitrary modes is under study at present. The invention provides a method for achieving conversion among arbitrary modes. The method includes firstly, analyzing mode field distribution characteristics of a mode to be converted and a target mode from a space domain, a spatial frequency domain and a conversion plane space domain, then theoretically establishing a transfer function model of the conversion among the arbitrary modes based on spatial frequency spectrum filtering, and finally using a phase position type space light modulator to build a mode conversion optics system. According to the mode conversion optics system, a conversion plane space domain mode field distribution matching principle is obtained by adapting the mode field beam waist radius of the conversion plane space domain to radiuses of mode fields of different modes, and a matching condition between the mode field beam waist radius of the conversion plane space domain and distribution of the mode fields of the different modes, and a mode field radius matching parsing method of the mode to be converted and the target mode are provided.

Description

technical field [0001] The invention relates to the field of space division multiplexing optical fiber communication systems, and more specifically relates to an arbitrary mode conversion method suitable for mode division multiplexing optical fiber communication systems. Background technique [0002] Mode-division multiplexing technology, as a space-division multiplexing technology, is based on the orthogonality between modes, using different modes as independent channels to carry different information, and multiplexing the technology for transmission in the same optical fiber. From the perspective of transmission capacity, mode division multiplexing technology is the same as WDM technology. There are M parallel channels in a single optical fiber, which expands the transmission capacity by M times, greatly improves spectrum utilization, and may meet future network requirements. capacity needs. Therefore, by adding the new physical dimension of space, mode division multiplex...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/04
Inventor 兰名荥喻松高立聂松蔡善勇马晨星齐晓莉杜智超顾畹仪
Owner BEIJING UNIV OF POSTS & TELECOMM
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