A kind of composite manufacturing method of micro-nano fiber coupler

Abstract

The invention provides a composite manufacturing method of a micro-nano optical fiber coupler, which realizes the precise control of the turning point of the micro-nano optical fiber coupler by combining thermal melting drawing method and wet etching method; Fusing together, rapid stretching realizes the preliminary processing of micro-nano fiber couplers, and the fiber couplers obtained by melting and tapering are packaged in a flow cell; through the combined method of hydrofluoric acid wet etching and online spectral monitoring system, micro-nano Precise drawing of the fiber coupler until a breakpoint occurs in the spectrum at the design wavelength. The processing method proposed by the invention has the characteristics of arraying, controllable turning point and good repeatability for future sensing systems based on optical fiber couplers, and can realize ultra-low concentration biological detection, gas detection, pressure detection and other fields.

Description

Technical field [0001] The present invention relates to a field such as biosensing and optical communication, in particular to a micro-nano optical fiber coupler composite manufacturing method. Background [0002] Micro-nano optical fiber is a fiber structure with a diameter close to or smaller than the wavelength of propagated light, usually with a diameter of about a few hundred nanometers, and has attracted much attention in the fields of near-field optics, nonlinear optics, surface plasmons, and micro-nano optical devices. The relatively large power share of the micro-nano fiber cladding makes most of the light propagate outside the micro-nano fiber in the form of a vanishing field, so the micro-nano fiber propagation field is sensitive to changes in the external environment, so it has a wide range of applications in environmental monitoring, biological sensing and other fields. Optical fiber coupler is to achieve optical signal power in different optical fibers between or co...

AI Technical Summary

Problems solved by technology

However, the biggest challenge in the practical application of micro-nano fiber couplers comes from their poor repeatability, especially the effective control of the position of the turning point.

Usually, the method of thermal fusion drawing is used to process such micro-nano-scale optical fiber couplers, but it is difficult to control the structural size of the optical fiber through the drawing speed and drawing constant.

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