Positive and negative curvatures nested in an antiresonant hollow-core fiber.

We propose a negative curvature hollow-core fiber that has a nested elliptical element in the antiresonant tubes. The additional elliptical element effectively adds two curvatures, namely, a positive and a negative curvature. Our numerical study shows that it enhances the confinement of the light in the core. Moreover, the nested elements provided an extra degree of freedom that can be exploited to suppress higher-order modes through the change of the ellipticity. The resulting low confinement loss and single-mode guidance properties of the proposed fiber make it a suitable candidate for applications in ultrashort pulse delivery and gas-based nonlinear systems.

[1]  Wen Zhou,et al.  Hyperuniform Disordered Network Polarizers , 2016, IEEE Journal of Selected Topics in Quantum Electronics.

[2]  E. Marcatili,et al.  Hollow metallic and dielectric waveguides for long distance optical transmission and lasers , 1964 .

[3]  P. Russell,et al.  Ultrafast nonlinear optics in gas-filled hollow-core photonic crystal fibers [Invited] , 2011 .

[4]  Ole Bang,et al.  Low-loss single-mode hollow-core fiber with anisotropic anti-resonant elements. , 2016, Optics express.

[5]  F. Benabid,et al.  High harmonic generation in a gas-filled hollow-core photonic crystal fiber , 2009 .

[6]  Amir Abdolvand,et al.  Hollow-core photonic crystal fibres for gas-based nonlinear optics , 2014, Nature Photonics.

[7]  Walter Belardi,et al.  Effect of core boundary curvature on the confinement losses of hollow antiresonant fibers. , 2013, Optics express.

[8]  T. Koch,et al.  Antiresonant reflecting optical waveguides in SiO2‐Si multilayer structures , 1986 .

[9]  Knight,et al.  Single-Mode Photonic Band Gap Guidance of Light in Air. , 1999, Science.

[10]  F Benabid,et al.  Large-pitch kagome-structured hollow-core photonic crystal fiber. , 2006, Optics letters.

[11]  W Rudolph,et al.  Molecular C2H2 and HCN lasers pumped by an optical parametric oscillator in the 1.5-microm band. , 2010, Optics express.

[12]  P. Roberts,et al.  Low loss broadband transmission in hypocycloid-core Kagome hollow-core photonic crystal fiber. , 2011, Optics letters.

[13]  F. Poletti,et al.  Fabrication of multiple parallel suspended-core optical fibers by sheet-stacking , 2014 .

[14]  E. Dianov,et al.  Demonstration of a waveguide regime for a silica hollow--core microstructured optical fiber with a negative curvature of the core boundary in the spectral region > 3.5 μm. , 2011, Optics express.

[15]  J. Knight,et al.  Hollow antiresonant fibers with reduced attenuation. , 2014, Optics letters.

[16]  Nail Akhmediev,et al.  Mid-infrared supercontinuum generation in supercritical xenon-filled hollow-core negative curvature fibers. , 2016, Optics letters.

[17]  Xiang Peng,et al.  Design and fabrication of hollow-core photonic crystal fibers for high-power ultrashort pulse transportation and pulse compression. , 2012, Optics letters.

[18]  Francesco Poletti,et al.  Nested antiresonant nodeless hollow core fiber. , 2014, Optics express.

[19]  Walter Belardi,et al.  Design and Properties of Hollow Antiresonant Fibers for the Visible and Near Infrared Spectral Range , 2015, Journal of Lightwave Technology.

[20]  Zhenming Yu,et al.  Bandwidth Improvement Using Adaptive Loading Scheme in Optical Direct-Detection OFDM , 2016, IEEE Journal of Quantum Electronics.