Coarse wavelength division multiplexer based on silicon-based nanobeam loop structure

Abstract

The invention relates to a coarse wavelength division multiplexer based on a silicon-based nano beam loop structure and application thereof. The coarse wavelength division multiplexer comprises a nano beam and a directional coupler. The two sides of the nano beam are connected with two waveguides of the directional coupler respectively. The nano beam is a straight waveguide with a plurality of small holes etched. According to the nano beam, a Fabry cavity is formed by two reflection mirrors; and the central wavelength and the free spectrual range of the coarse wavelength division multiplexer can be changed by changing the cavity length of the nano beam. Therefore, the bending loss can be avoided; the multiplexer dimension can be reduced; the large FSR can be realized; and thus the coarse wavelength division multiplexer can be improved.

Description

technical field [0001] The invention relates to a technology in the field of optical fiber communication, in particular to a coarse wavelength division multiplexer based on a silicon-based nano-beam loop structure. Background technique [0002] As the capacity of the optical communication system continues to rise, the number of optical devices is also increasing, which leads to an increase in the area required for the equipment room. At the same time, the more the number of devices, the more heat generated, requiring more heat dissipation systems, thus Increases the cost of the entire network. In order to reduce the number of devices, device volume, and cost, it is necessary to design integrated optical devices. Silicon-based photonic integrated devices have received more and more attention in recent years due to their CMOS process compatibility, high integration and low power consumption. In a multi-band optical network, a coarse wavelength division multiplexing (CWDM) de...

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Problems solved by technology

[0002] As the capacity of the optical communication system continues to rise, the number of optical devices is also increasing, which leads to an increase in the area required for the equipment room. At the same time, the more the number of devices, the more heat generated, requiring more heat dissipation systems, thus Increases the cost of the entire network

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