Abstract The optical performance characteristics of anti‐resonant hollow‐core fibers (known as AR‐HCFs or ARFs) are improving rapidly, but the polarization maintaining issue with these remains unresolved. Although a regular nonbirefringent ARF can maintain high purity under static conditions, it cannot resist mechanical disturbances. In this work, by designing bi‐thickness semi‐tube structure fourfold rotational symmetry, first level birefringence close to 10 −4 is fabricated. proposed...

Abstract The performance of optical fiber communication, laser, and sensing systems is ultimately limited by the attenuation fiber, which cannot be lower than barrier set Rayleigh scattering in bulk silica glass. In this work, longstanding limit conquered using a hollow‐core (HCF). Two visible‐guiding conjoined‐tube anti‐resonant fibers are successfully fabricated exhibit overall losses 3.8 dB km −1 at 680 nm 4.9 558 nm, respectively. latter surpasses glass 2 corresponding wavelength....

To go beyond the fundamental limits imposed by latency, nonlinearity, and laser damage threshold in silica glass fibers, hollow-core fiber (HCF) technique has been intensively investigated for decades. Recent breakthroughs ultralow-loss HCF clearly imply that long-haul applications of communications lasers are going to appear. Nevertheless, up now, as a whole is still hampered limited length single span lack HCF-based functional devices. resolve these two issues, it importance develop...

Hollow-core fiber (HCF) promises to unify air-borne light propagation and non-line-of-sight transmission, thus holding great potential for versatile photonics-based quantum information applications. The early version of HCF based on photonic-bandgap guidance has not proven itself a reliable channel because the poor modal purity in both spatial polarization domains, as well significant difficulty fabrication when wavelength shifts visible region. In this work, degree freedom, we demonstrate...

We develop a hybrid cold/heat two-step splicing approach for low loss, backreflection, and high polarization extinction ratio (PER) hollow-core to solid-core fiber interconnection. The employed (HCF) is our recently developed high-birefringence polarization-maintaining (PM-HCF) with PER value of ∼30 dB, the (SCF) commercial Panda (Panda fiber). Simultaneous backreflection (<-35 dB), insertion loss (IL) (∼0.7 (∼27 dB) are achieved, representing first high-performance PM-HCF/SCF...

We report on the design, fabrication, and characterization of a low-loss birefringent semi-tube anti-resonant hollow-core fiber (AR-HCF). By optimizing structure design stack-and-draw fabrication technique, transmission loss 4.8 dB/km at 1522 nm, <10 bandwidth 154 phase birefringence 1.8 × 10-5 are demonstrated. This achieved is more than one order magnitude lower previously reported AR-HCF broader photonic bandgap (PBG-HCF) with same level. The polarization extinction ratio (PER) reaches...

The inherent material imperfections of solid core optical fiber, for example, Kerr nonlinearity, chromatic dispersion, Rayleigh scattering and photodarkening, set fundamental limitations further improving the performances fiber-based systems. Hollow-core fiber (HCF) allows light to be guided in an air with many unprecedented characteristics, overcoming almost all shortcomings arising from bulk material. exploitation HCF could revolutionize research fields ranging ultra-intense pulse...

Precise control of group velocity dispersion (GVD) by pressure in a gas-filled hollow-core fiber (HCF) is essential importance for many gas-based nonlinear optical applications. To accurately calculate the pressure-induced variations (∂β2/∂p) anti-resonant types HCF, an analytical model combining contribution gas material, capillary waveguide, and cladding resonances developed, with insightful physical picture. Broadband (∼1000 nm) GVD measurements single-shot manner realize accuracy...

We report on a hollow-core conjoined-tube negative-curvature fiber with measured transmission losses of 2.7dB/km at 1150nm and 3.8dB/km 680nm. The loss from 653 to 706 nm approaches the Rayleigh scattering limit silica fiber.

An anti-resonant hollow-core fiber capable of propagating the LP11 mode with high purity and over a wide wavelength range is proposed demonstrated. The suppression fundamental relies on resonant coupling specific gas selectively filled into cladding tubes. After length 2.7 m, fabricated shows extinction ratio 40 dB at 1550 nm above 30 in 150 nm. loss measured to be 2.46 dB/m We discuss potential application such fibers high-fidelity high-dimensional quantum state transmission.

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We provide a semi-empirical model for straightforward and rapid evaluation of the effective index, confinement loss birefringence mainstream birefringent anti-resonant hollow-core fibers (Bi-ARFs). It is based on observation that polarization-dependent performance Bi-ARF shows weak reliance order or type band. The comparison with simulation results validates effectiveness this model. Furthermore, provides an optimal bi-thickness selection strategy to maximize while minimizing penalty....

An ultralow-loss, plug-and-play single-mode hollow-core fiber (HCF) connector is developed. Insertion loss of 0.13 dB and 0.10 for HCF to itself @1550 nm a standard @1489 nm, respectively, demonstrated.

We report the first high-birefringence hollow-core anti-resonant fiber with a pseudoCv symmetry. The resulted shows phase birefringence, polarization etfinction ratio, and loss of 0.9 X10 -4 , 25 dB, 250 dB/km, respectively, at 1550 nm.

We summarize our recent work on design, fabrication and characterization of birefringent, low loss broadband semi-tube hollow-core anti-resonant fiber. also show its interconnection with panda

Antiresonant hollow-core fibers (AR-HCFs) have emerged as a groundbreaking fiber technology. However, an inherent tradeoff exists between birefringence, loss, and bandwidth in AR-HCF. Here we propose crescent-shaped core AR-HCF that achieves significant birefringence through asymmetric shaping, without compromising loss or characteristics. Simulation results show, at of 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−5</sup> level,...

We summarize our recent work on design, fabrication and characterization of birefringent, low loss broadband semi-tube hollow-core anti-resonant fiber. also show its interconnection with panda

Hollow-core fiber (HCF) has found plenty of interdisciplinary applications in areas ranging from ultra-intense pulse delivery, single-cycle generation, low latency optical communication, UV light sources, mid-IR gas lasers to biochemical sensing, quantum optics and Terahertz waveguides. These calls for better performance HCF, especially loss, bandwidth mode quality. Here we present a new hollow-core with conjoined-tubes the cladding negative-curvature core shape. It exhibits minimum...

The ultimate limit on fiber loss is set by the intrinsic Rayleigh scattering of silica glass material. Here, we challenge this in visible region using a hollow-core approach. Two visible-guiding conjoined-tube negative-curvature fibers are successfully fabricated and exhibit overall losses 3.8 dB/km at 680 nm 4.9 558 respectively. latter surpasses green spectral 2 dB. Numerical simulation indicates that level still much higher than fundamental surface fiber.

We experimentally demonstrate high-fidelity (~0.98), polarization-based single-photon transmission and entanglement distribution over a 36-meter-long, low-loss (&lt;10 dB/km), 800 nm- guiding hollow-core conjoined-tube fiber quantum channel, which inherently possesses low latency.

An anti-resonant hollow-core fiber (AR-HCF) with loss of 5.6 dB/km at 1550 nm, phase birefringence 1.8× 10 -5 , polarization extinction ratio ~20 dB and bandwidth 154 nm is reported, representing the first low polarization-maintaining ARF.