Field optical fibre probe and its production

Abstract

A method for preparing near-field optical fiber probe includes using HF acid corrosion to process optical fiber to form reduced front-end diameter in certain conical angle, using plastic solution to clad said conical unit of optical fiber and curing plastic solution to form plastic film on surface of optical fiber, inserting prepared optical fiber HF acid with oil protection for corroding said optical fiber and using organic solvent to remove off plastic film on surface of said optical fiber to obtain near-field optical fiber probe.

Description

technical field [0001] The invention belongs to the technical field of preparation of core components of optical precision instruments, and relates to a method for preparing a near-field optical fiber probe, in particular to a method for preparing a high-quality near-field optical fiber probe by pretreating an optical fiber and then corroding it. Background technique [0002] As an important optical instrument, scanning near-field optical microscope (SNOM or NOSM) is widely used in the fields of physics, chemistry, material science, life science, geology and information industry. As a new member of the scanning probe microscope family, it is mainly used to observe and study the appearance, morphology and optical properties of objects at the nanoscale and mesoscopic scale. Among them, the use of SNOM to conduct spectral research on low-dimensional mesoscopic systems at the nanoscale is the core of SNOM. One of the important applications. How to effectively improve the collec...

AI Technical Summary

Problems solved by technology

[0003] At present, among many methods of preparing near-field optical fiber probes by chemical etching, the earliest Turner method is to insert the bare optical fiber directly into HF acid for etching. The device is simple, but the shape of the probe is easily affected by external disturbances, resulting in The surface is not smooth; the dynamic corrosion method uses the relative moving corrosion between the bare optical fiber and the HF acid liquid surface to prepare the needle tip on the basis of the Turner method. And the diameter of the tip is not small enough; the Tube etching method proposed at the end of last century, the main steps are to insert the optical fiber together with its plastic protective layer into HF acid, and use the HF acid penetration corrosion on the side of the optical fiber and the HF acid convective corrosion at the bottom of the optical fiber to prepare the needle tip. After the tip is formed, use concentrated sulfuric acid to corrode or mechanically remove the plastic protective layer to obtain an optical fiber probe

Although the surface of the probe prepared by the Tube etching method is smooth, it is corroded in the plastic protective layer of the optical fiber, and the corrosion range is large, so the obtained probe tip has a large diameter and an uncertain shape

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