Open AccessMid-infrared flattened supercontinuum generation in all-normal dispersion tellurium chalcogenide fiber
Author(s) -
Kai Jiao,
Jinmei Yao,
Zheming Zhao,
Rongping Wang,
Nian Si,
Xunsi Wang,
Peng Chen,
Zugang Xue,
Youmei Tian,
Bin Zhang,
Peiqing Zhang,
Shixun Dai,
Qiuhua Nie,
Rongping Wang
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.002036
Subject(s) - supercontinuum , materials science , cladding (metalworking) , optics , chalcogenide , tellurium , femtosecond , chalcogenide glass , dispersion shifted fiber , infrared , optical fiber , optoelectronics , laser , photonic crystal fiber , wavelength , fiber optic sensor , physics , composite material , metallurgy
We have prepared a well-structured tellurium chalcogenide (ChG) fiber with a specialized double cladding structure by an improved extrusion method, and experimentally demonstrated an ultra-flat mid-infrared (MIR) supercontinuum (SC) generation in such a fiber. The step-index fiber had an optical loss of <1 dB/m in a range from 7.4 to 9.7 μm with a minimum loss of 0.69 dB/m at 7.87 μm. Simulation showed that an all-normal dispersion profile can be realized in this double cladding tellurium fiber. An ultra-flat MIR SC spectrum (~3.2-12.1μm at -10 dB, ~2-14 μm at -30 dB) was generated from a 22-cm long fiber pumped with a femtosecond laser at 5 μm (~150 fs, 1 kHz). Then the degree of coherence was calculated out based on a simulation, showing that a high coherent MIR SC (from 2.9 to 13.1 μm) can be generated in this double-cladding tellurium fiber.