Reconfigurable tunable band elimination photon filter

Abstract

The embodiment of the invention disclose a photon filter. The photon filter comprises a tunable coupler and a phase shifter; the tunable coupler comprises a first beam splitting structure, a second beam splitting structure, a first waveguide and a second waveguide, the first beam splitting structure is provided with a first input port, a second input port, a first output port and a second output port, the second beam splitting structure is provided with a third input port, a fourth input port, a third output port and a fourth output port, the first waveguide is coupled between the first outputport and the third input port, and the waveguide is coupled between the second output port and the fourth input port; the phase shifter is coupled between the second input port and the fourth outputport, and the phase shifter and the tunable coupler constitute a filtering loop. The spectral response of the photon filter is reconfigurable, the band elimination center wavelength can be continuously tuned, the reconfiguration and tuning speed is 3-4 orders of magnitudes higher than that of a thermal control mechanism, and the reliability is higher.

Description

technical field [0001] The invention relates to the technical field of optical signal processing, in particular to a reconfigurable and tunable band-stop photon filter. Background technique [0002] With the popularity of optical communication and optical transmission, traditional micro-optical devices are being replaced by integrated optics and integrated optoelectronic devices. In the field of microwave technology, the signal bandwidth is increasing day by day. Limited by the electronic bandwidth bottleneck, it is very difficult to perform such broadband signal processing in the electrical domain, and the optical domain signal processing technology of microwave signals has received increasing attention and extensive research. As data rates have increased, fiber optics have replaced copper wires in the transmission of information over long distances because the higher speed signals experience little attenuation. The ultra-fast electrical signals between the microchip and ...

AI Technical Summary

Problems solved by technology

However, the existing tunable optical filters are either based on polymer waveguides, which have poor reliability; or their tuning is carried out by using the thermo-optic effect of the refractive index of the waveguide material, and the refractive index of the optical medium varies with temperature. The tuning speed of this thermal control tuning mechanism is slow, and the problem of thermal crosstalk between different thermal control units is relatively serious

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