MZ interference structure optical separator based on resonant ring assistance

Abstract

The utility model discloses a resonant-ring-aided optical isolator of the MZ interference structure. The MZ interference structure consists of two parallel interference arms, two ends of which are connected with an input wave-guide and an output wave-guide. An interference arm is coupled with two resonant rings or more, and the other interference arm comprises a length of delay line. Nonreciprocal phase shift wave-guides having different phase delay during forward and backward transmission of light wave are embedded into the whole resonant-ring-aided MZ interference structure. The optical isolator in the utility model makes use of nonreciprocal property of the magneto-optical wave-guide; and brings the advantages into play of the passband flatness of the resonant-ring-based MZ interference structure. The simultaneous treatment to the multi-channel light waves can be realized through rational design and optimization of the structural parameters. The optical isolator with typical structure, simple technology, flexible design, great functionality and other characteristics has an extensive application prospect in wavelength division multiplexing network, optical bidirectional network, optical information processing and other fields.

Description

technical field [0001] The invention relates to optical components, in particular to an optical isolator based on a resonant ring-assisted MZ interference structure. Background technique [0002] To achieve high-density integration of optical processing and communication systems, waveguide-type isolation devices have received extensive attention. It provides a strong guarantee for the stability of the light wave output system and the light wave non-reciprocal transmission. However, current waveguide type isolators are inferior to commercially available optical isolation devices in terms of bandwidth and isolation. Yuya Shoji and others greatly improved the bandwidth of the traditional MZ structure by optimizing the horizontal and vertical dimensions of the waveguide according to the wavelength-dependent characteristics of the reciprocal phase shift and non-reciprocal phase shift of the waveguide [Opticsexpress, Vol.15, No.2 , 639-645, 2007]. However, too many structural p...

AI Technical Summary

Problems solved by technology

Although the latter design is very compact, the isolation and passband additional loss are greatly limited by the waveguide bending and cascading structure

Moreover, none of the reported isolators are suitable for WDM networks with multi-wavelength processing

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