A method and device for manufacturing an ultra-thin-walled hollow microsphere optical resonant cavity

Abstract

The invention discloses a method and device for manufacturing an ultra-thin-walled hollow microsphere optical resonant cavity. The device includes two parts: a heating system and a pressurizing system; wherein, the heating system includes an Ω-shaped heating ring (2) and a control power supply ( 4), providing uniform heating at a high temperature of 900-1000°C for the hollow silica optical fiber (1); ) provides a constant air pressure of 200-300kPa inside; adopts full-angle non-contact uniform radiation heating molding method, non-contact radiation along the circumferential direction of the hollow fiber is uniformly heated to a molten state, and the air pressure is applied inside the hollow fiber at the same time, and the outer wall of the fiber is affected by the pressure difference between the inside and outside Under step-by-step expansion molding, a high-quality hollow microsphere resonator is prepared. The hollow microsphere resonator prepared by the invention has the advantages of ultra-thin wall, high roundness, and low eccentricity, and has application value in the fields of high-sensitivity refractive index sensing, tunable micro-nano laser, and nonlinear optical frequency comb.

Description

technical field [0001] The invention relates to the field of optical microresonator, in particular to a method for preparing an ultrathin-walled hollow microsphere resonator and a manufacturing device thereof. Background technique [0002] Whispering gallery mode (Whispering gallery modes, WGM) is an optical microcavity resonant mode formed in a circular symmetric medium by electromagnetic waves based on the confinement mechanism of optical total reflection. Perfect circular symmetric resonators (including microspheres, microdisks, microtubes, hollow Structures such as microspheres) have extremely high Q values, and have important application value in the fields of high-sensitivity refractive index sensing, tunable micro-nano lasers, and nonlinear optical frequency combs. [0003] Among them, hollow microsphere resonators have unique advantages in the fields of biology, chemistry, and medicine related to high-sensitivity refractive index sensing. Compared with the open coup...

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Problems solved by technology

However, due to the short arc discharge, the expansion process of the hollow capillary is difficult to control precisely, and the wall thickness of the microspheres is usually thick.

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