Construction method of three-dimensional active coupling resonance loop structure with rare earth doped glass as matrix material

Abstract

The invention relates to a construction method of a three-dimensional active coupling resonance loop structure with rare earth doped glass as a matrix material. The method comprises the following steps: step one, preparing blocked and cubic rare earth doped glass as a matrix material by employing a traditional fusion method; a doping concentration range of an rare earth ion in the glass matrix is as follows: Er: 0.6 to 10 wt%; and Yb: 1 to 10 wt%; and step two, etching a coupling resonance loop waveguide structure on the prepared blocked and cubic rare earth doped glass by utilizing a femto second laser. The three-dimensional active coupling resonance loop structure provided in the invention can be used for constructing three-shaft integrated optical gyro to measure angular velocities from three directions. Doping of the rare earth ion enables optical gain to be provided, so that loss of transmitted light in the structure can be effectively compensated and thus a signal to noise ratio of an optical waveguide gyro is enhanced. Therefore, when the construction method provided in the invention is implemented to construct the optical waveguide gyro, a three-shaft integrated optical gyro with high sensitivity can be realized. The construction method ahs good practical value and wide application prospect in the field of coupling resonance loop technology of an integrated optical gyro.

Description

(1) Technical field [0001] The invention relates to a rare-earth-doped glass-based three-dimensional active coupling resonant ring structure that can provide optical gain, in particular to a method for constructing a rare-earth-doped glass-based three-dimensional active coupling resonant ring structure, which belongs to the integrated optical gyroscope coupling resonant ring technology field. (2) Background technology [0002] Based on recent breakthroughs in silicon-based photonic devices, future research on integrated optical gyroscopes will develop in the direction of all-photonic integration, that is, integrating different discrete devices such as light sources, waveguide rings (instead of optical fiber rings), and detectors into the same chip. The volume of the device is reduced, the cost is reduced, and large-scale production is realized. In addition, in the product line of fiber optic gyroscopes, there is a three-axis fiber optic gyroscope, which uses the same superl...

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Problems solved by technology

However, the waveguide integration method of this structure is limited to planar optical path (two-dimensional) integration and most of them are passive structures, which limits its development to a certain extent.

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