Device and method for tuning echo wall micro-cavities

Abstract

The invention provides a device and a method for tuning echo wall micro-cavities. The device comprises an optical fiber. The echo wall micro-cavities which are positioned on a side of a fiber core are arranged in cladding of the optical fiber, graphene is laid at cavity openings of the echo wall micro-cavities and is connected with electrodes, and voltages are applied to the graphene by the electrodes, so that the echo wall micro-cavities can be tuned. The device and the method have the advantages that the echo wall micro-cavities are integrated in the optical fiber, the fiber core in the optical fiber is used as waveguide for exciting the echo wall micro-cavities, and accordingly the device is compact and stable in structure; distances between the echo wall micro-cavities and the waveguide for exciting the echo wall micro-cavities rarely change in tuning procedures, accordingly, the device and the method rarely affect quality factors of the echo wall micro-cavities, and the tuning accuracy of the echo wall micro-cavities can be improved; only input laser devices are required in the tuning procedures, extra laser devices can be omitted, and accordingly the device and the method are low in tuning cost; the graphene is extremely high in heat conductivity, heat generated by the graphene can be quickly transmitted to the echo wall micro-cavities, and accordingly the device and the method are high in tuning efficiency.

Description

technical field [0001] The invention relates to the field of micro-nano optical devices, in particular to a whispering gallery microcavity tuning device and method. Background technique [0002] The whispering gallery microcavity confines the light of a specific wavelength to be transmitted inside the resonator through continuous total reflection, and its quality factor can reach 10 10 . The ultra-high quality factor appears as an ultra-narrow bandwidth passband or stopband on the spectrum of the whispering gallery microcavity. In addition, the whispering gallery microcavity can confine the mode field of the resonant wavelength in an ultra-small volume, that is, the mode volume of the whispering gallery microcavity is ultra-small but the energy density is ultra-high. Based on the above characteristics, whispering gallery microcavities have been applied in the fields of ultra-low threshold nonlinear optics, lasers and ultra-high sensitivity sensing. [0003] To maximize th...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a whispering gallery microcavity tuning device and method to solve the problems of high cost and low accuracy of current thermal tuning methods

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