On-Chip Cascaded Bandpass Filter and Wavelength Router Using an Intelligent Algorithm

Abstract

Cascaded nanophotonic devices play a vital role in all-optical connection, all-optical computation and all-optical network. However, there is almost no effective method for the direct design of on-chip cascaded nanophotonic devices, since current study of nanophotonic devices mostly focuses on single device. Here, on-chip cascaded nanophotonic devices are designed based on an intelligent algorithm by combining genetic algorithm, simulated annealing algorithm and finite element method for the first time, and verified experimentally by using silicon-based planar structures. The cascaded devices consist of a bandpass filter and a wavelength router operating in optical communication range. The operation bandwidth of the bandpass filter is 408 nm with transmission more than 80%, within which the communication wavelengths of 1,300 nm and 1,550 nm are routed into different output ports through the wavelength router component. The footprint is only 3.62 μm 2 for the bandpass filter and only 2.56 μm 2 for the wavelength router, which are easy for integration with planar structures and ultrasmall size. This work provides a highly-efficient scheme for the realization of on-chip cascaded nanophotonic devices on the same chip, and lays a foundation for the realization of photonic chip based on intelligent algorithm.

Polarization and wavelength routers based on diffractive neural network

“…However, the overall performance of the network is affected by the challenge of establishing complete connections and the complexity of data transmission between nodes. As a significant component in optical interconnections, optical routers [ 19 , 20 ] play an indispensable role in facilitating efficient data transmission across optical networks. A multitude of methodologies have been proposed to realize the all-optical router.…”

On-Chip Topological Multichannel Filtering and Routing Device Based on Synthetic Dimension

“…This limits the application of topological nanophotonic filters in integrated nanophotonic chips. When solving the problem of separating light of different frequencies, we can use nanophotonic routers to guide signals of different frequencies into different ports for output [10][11][12][13][14], so the realization of on-chip topological nanophotonic filtering and routing devices are of great significance. However, there are few reports on topological multichannel filtering and routing device.…”