Simulation of infrared photonic crystal fibers based on crystals system AgBr – TlBr0.46I0.54

D D Salimgareev,A S Shmygalev,A.A Lashova,L V Zhukova,A.E Lvov

doi:10.1088/1742-6596/1410/1/012145

D D Salimgareev, A S Shmygalev + Show 3 more

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https://doi.org/10.1088/1742-6596/1410/1/012145

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Abstract

In this paper, a computer simulation of photonic crystal fibers (PCF) based on the AgBr – TlBr0.46I0.54 system was performed. The simulation was carried out in the SMTP program integrated into Matlab. As a simulation result, PCF with the hexagonal structure of PBG-inserts with an increased mode field diameter of up to 200 μm was obtained.

Highlights

Among the infrared materials suitable for the manufacture of optical fibers, monocrystals of silver halides and monovalent thallium are distinguished
photonic crystal fibers (PCF) active core (AC) allow transmitting high-power radiation in a single-mode with a Gaussian distribution of the mode field over the fiber section. The manufacture of such PCFs is a long and resource-intensive process, which is carried out using a combination of “stack and drow” and “row in tube” technologies, which make it possible to obtain a clear interface and a strict structure of inserts in the fiber
Experimental data When simulating PCF based on AgBr-TlBr0.46I0.54 (KRS-5) system crystals, KRS-5 contents in silver bromide were taken from 3 to 29 wt.% and the compositions were selected so, that the matrix refractive index was greater than the photonic bandgaps (PBG) index, but less than the central insert index

Summary

Introduction

Among the infrared materials suitable for the manufacture of optical fibers, monocrystals of silver halides and monovalent thallium are distinguished One of such monocrystalline system is AgBr - TlBr0.46I0.54 crystals, on the basis of which using extrusion infrared fibers can be made that have unique optical properties: a wide transmission range from 2.0 to 25.0 μm, photo- and radiation resistance, small optical loss up to 0.5 dB/m. PCF AC allow transmitting high-power radiation in a single-mode with a Gaussian distribution of the mode field over the fiber section The manufacture of such PCFs is a long and resource-intensive process, which is carried out using a combination of “stack and drow” and “row in tube” technologies, which make it possible to obtain a clear interface and a strict structure of inserts in the fiber.

Materials and methods

Conclusion