Chiral molecule detection device based on tapered fiber

Abstract

The invention relates to the field of chiral detection, and provides a tapered fiber-based chiral molecule detection device, the device comprises an optical fiber, a reflecting layer, a fiber circulator, a light source and a light detector, one section of the optical fiber is a tapered area, the reflecting layer is of a chiral structure and is fixedly arranged on the end face of one end of the optical fiber, the other end of the optical fiber is a reserved end, and the optical fiber circulator is arranged on the reserved end. The reserved end is connected with one port of the optical fiber circulator, the other two ports of the optical fiber circulator are connected with the light source and the optical detector respectively, and the connection mode of the optical fiber circulator meets the requirement that laser emitted by the light source enters the reserved end through the optical fiber circulator, and laser emitted from the reserved end enters the optical detector through the optical fiber circulator. The chirality of the chiral molecules has great influence on the light intensity of the reflected laser, that is, the difference of reflection coefficients of the reflected laser obtained by the two chiral molecules with small chirality characteristic difference is great, so that the device provided by the invention has high chirality detection accuracy and sensitivity.

Description

technical field [0001] The invention relates to the field of chiral detection, in particular to a chiral molecular detection device based on a tapered optical fiber. Background technique [0002] Hand shape refers to the property that a structure cannot coincide with its mirror image structure through in-plane translation and rotation. For example, our hands, the left hand and the mirror image of the right hand cannot overlap. Chirality is a ubiquitous phenomenon in nature and plays a vital role in life. Chiral molecules refer to molecules with a certain configuration or conformation that are different from their mirror images and cannot overlap each other. All chiral molecules are optically active, that is, there are special optical properties such as asymmetric transmission, circular dichroism, and circularly polarized luminescence. Active, and all molecules of optically active compounds are chiral molecules. Chiral molecules include asymmetric molecules without any ele...

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Problems solved by technology

[0003] The publication number is "CN111751344A", and the patent application titled "Chirality Measuring Device for Measuring Chiral Molecules" provides an optical-based chiral molecular detection device, but the device is realized by optical path design, and it is used in many An optical device, the overall volume is large, it is not convenient to carry, and it has high requirements for beam alignment. In addit

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