Method for manufacturing a fibre reflection interferometer based on a metal-dielectric diffraction structure

• Published in: Quantum electronics (Woodbury, N.Y.) Vol. 49; no. 4; pp. 399 - 403
• Main Authors: Terentyev, V.S., Simonov, V.A., Lobach, I.A., Babin, S.A.
• Format: Journal Article
• Language: English
• Published: Bristol Kvantovaya Elektronika, Turpion Ltd and IOP Publishing 01.04.2019; IOP Publishing
• Subjects: ALUMINIUM; aluminium film with a hole; Aluminum; Apertures; ASYMMETRY; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; dielectric interference coating; DIELECTRIC MATERIALS; Dielectrics; DIFFRACTION; FIBERS; HOLES; INTERFEROMETERS; LAYERS; MIRRORS; Multilayers; OPTICS; Radiation tolerance; Reflectance; Reflection; reflection fibre interferometer; RESONATORS; Short fibers; THIN FILMS; WAVELENGTHS
• ISSN: 1063-7818; 1468-4799
• DOI: 10.1070/QEL16922

A new method for manufacturing a two-mirror reflection fibre interferometer in a single-mode fibre consisting of an input mirror with an asymmetric reflection coefficients and a highly reflective end mirror is presented and experimentally demonstrated. The input mirror is based on a metal-dielectric diffraction structure in the form of an aperture in an aluminium film and a dielectric multilayer coating, which provides asymmetry of the reflection coefficient. The method includes the calculation of the energy coefficients of the aluminium film with a hole, the determination of the optimal diameter of the hole, as well as making of the hole, the entrance mirror and the resonator with a short fibre base. A sample interferometer is demonstrated that has an increased (at least by two orders of magnitude) radiation resistance compared to variants based on a continuous metal film, namely, at least 100 mW of radiation in a single-mode SMF-28e fibre at a wavelength of 1550 nm.