A5088607163- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Spectroscopy and Laser Applications
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Solid State Laser Technologies
- Optical Coherence Tomography Applications
- Advanced Optical Network Technologies
- Granular flow and fluidized beds
- Optical Wireless Communication Technologies
- Photoacoustic and Ultrasonic Imaging
- Spectroscopy Techniques in Biomedical and Chemical Research
- Particle Dynamics in Fluid Flows
- Atmospheric Ozone and Climate
- Fluid Dynamics Simulations and Interactions
- Photonic Crystals and Applications
- Photodynamic Therapy Research Studies
- Glass properties and applications
- Big Data Technologies and Applications
- Fluid Dynamics and Turbulent Flows
- Laser Material Processing Techniques
- Surface Roughness and Optical Measurements
University of Southampton
2016-2025
Honeywell (United States)
2021
STMicroelectronics (United Kingdom)
2017
For over 50 years, pure or doped silica glass optical fibres have been an unrivalled platform for the transmission of laser light and data at wavelengths from visible to near infra-red. Rayleigh scattering, arising frozen-in density fluctuations in glass, fundamentally limits minimum attenuation these hence restricts their application, especially shorter wavelengths. Guiding hollow (air) core offers a potential way overcome this insurmountable limit set by glass's but requires reduction all...
We report the first double-nested antiresonant hollow core fiber. The fiber matches loss of commercial solid fibers in C-band (0.174 dB/km) and fundamentally improves it (0.22 O-band.
Over the past few years, progress in hollow-core optical fiber technology has reduced attenuation of these fibers to levels comparable those all-solid silica-core single-mode fibers. The sustained pace field sparked renewed interest and created expectation that it will one day enable realization most transparent light-propagating waveguides ever produced, across all spectral regions interest. In this work we review analyze various physical mechanisms drive We consider both somewhat legacy...
We report the fabrication of a hollow-core DNANF with geometry extensively optimized for minimum loss. Three independent loss measurements average 0.08±0.03 dB/km at 1550 nm, lowest attenuation ever achieved in an optical fiber.
We report an effectively single mode tubular antiresonant hollow core fiber with minimum loss of ~25 dB/km at ~1200 nm, and extremely wide low-loss transmission window (lower than 30 from 1000 to 1400 nm 6 dB bandwidth exceeding nm). Despite the relatively large field diameter 32 μm, can be interfaced SMF28 produce fully connectorized samples. Exploiting excellent modal purity arising differential low intermodal coupling, we demonstrate penalty-free 10G on-off keying data through 100 m...
We report an effectively single-moded, 1.7km long hollow core Nested Antiresonant Nodeless Fiber (NAOT) with record-low 0.28dB/km loss from 1510 to 1600nm, which further reduces the gap standard all-glass single mode fibers.
The fabrication of hollow core microstructured fibers is significantly more complex than solid due to the necessity control microstructure with high precision during draw.We present first model that can recreate tubular anti-resonant fiber draws, and accurately predict draw parameters geometry fiber.The was validated against two different experimental draws very good agreement found.We identify a dynamic within process lead premature irreversible contact between neighboring capillaries...
Resonator fiber optic gyroscope (RFOG) performance has hitherto been limited by nonlinearity, modal impurity, and backscattering in the sensing fibers. The use of hollow-core (HCF) effectively reduces but complex interplay among glass air-guided modes conventional HCF technologies can severely exacerbate RFOG instability. By employing high-performance nested anti-resonant nodeless fiber, we demonstrate long-term stability a hollow-fiber 0.05 deg/h, nearing levels required for civil aircraft...
Using hollow-core NANFs with 5-nested-tubes, we achieve the lowest loss ever reported in a hollow core fiber at 1300 and 1625nm (0.22dB/km), any type of optical 850nm (0.6dB/km) 1060nm (0.3dB/km).
The low intrinsic nonlinearity and signal latency characteristic of Hollow Core Photonic Bandgap Fibers (HC-PBGFs) have fueled strong interest for data transmission applications. Whereas most research to date has looked at improving the optical performance HC-PBGFs (e.g., reducing loss, increasing bandwidth achieving well-tempered modal properties through suppression surface mode resonances). In this study, we address challenging problem scaling up fabrication these fibers multi-kilometer...
We report a Nested Antiresonant Nodeless hollow-core Fiber (NANF) operating in the first antiresonant passband. The fiber has an ultrawide operational bandwidth of 700 nm, spanning 1240-1940 nm wavelength range that includes O-, S-, C- and L- telecoms bands. It minimum loss 6.6 dB/km at 1550 ≤7 between 1465-1655 ≤10 1297-1860 nm. By splicing together two structurally matched fibers by adding single mode (SMF) pigtails both ends we have produced ~1 km long span. concatenated connectorized...
We report fabrication of a Nested Antiresonant Nodeless hollow-core Fibre (NANF) with minimum loss 1.3dB/km at 1450nm and 65nm bandwidth below 1.5dB/km. The 0.5-km long fibre is effectively single moded shown capable data transmission.
We report a high-power single-mode mid-infrared (MIR) pulse delivery system via anti-resonant hollow-core fiber (HCF) with record distance of 108 m. Near-diffraction-limited MIR light was transmitted by HCFs at wavelengths 3.12-3.58 µm using tunable optical parametric oscillator (OPO) as the source. The were purged beforehand argon in order to remove or reduce loss due parasitic gas absorption (HCl, CO2, etc.). minimum values 0.05 and 0.24 dB/m 3.4-3.6 4.5-4.6 µm, respectively, figure...
Hollow-core optical fibers can offer broadband, single mode guidance in the UV-visible-NIR wavelength range, with potential for low-loss, solarization-free operation, making them desirable and potentially disruptive a wide range of applications. To achieve this requires fabrication <300nm anti-resonant membranes, which is technically challenging. Here we investigate underlying fluid dynamics fiber process demonstrate new three-stage approach, capable delivering long (∼350m) lengths...
We report a hollow core Nested Antiresonant Nodeless Fibre (NANF) with loss of 0.65dB/km across the full C and L telecommunication bands. The fabricated fibre is 1.23km long, it effectively single moded over sufficiently long lengths, able to transmit data.
We present a new approach to permanently inter-connect hollow-core fiber (HCF) solid-core fiber, which does not involve fusion splicing. Our is based on modification of the glue-based fiber-array technology routinely used for pigtailing planar lightwave circuits. The resulting interconnection provides low insertion loss due fact that HCF microstructure deformed during gluing (low temperature) process almost impossible achieve with standard (high splicing method. Furthermore, this...
We report on two recirculating loop transmission experiments over a hollow-core fiber of the Nested-Antiresonant Nodeless type (NANF). transmitted 61 channels in C-band at 32 GBaud, with either PM-QPSK or PM-16QAM modulation. In addition, L-band interferers co-propagated NANF all times, though they were not recirculated loop, to check for presence possible crosstalk effects between C and NANF. The comprised longest line yet constructed (7.72 km), as well 55 km pure-silica-core (PSCF) needed...
We report the first extruded tellurite antiresonant hollow core fibers (HC-ARFs) aimed at delivery of mid-infrared (Mid-IR) laser radiation. The preform extrusion fabrication process allowed us to obtain preforms with non-touching capillaries in a single step, hence minimizing thermal cycles. were fabricated from in-house synthetized glass (containing Zn, Ba and K oxides) co-drawn fluorinated ethylene propylene (FEP) polymer outer layer improve their mechanical properties protect humidity....
We investigate the design of hollow-core fibers for delivery 10s kilowatt average power from multi-mode laser sources. For such lasers, through solid-core is typically limited by nonlinear optical effects to meters distance. Techniques are presented here anti-resonant that can efficiently couple and transmit light these lasers. By numerical simulation we analyze performance two targeting continuous-wave lasers with M2 up 13 find they capable delivering MW-level over several kilometers low...
We propose a new method to accurately model the structural evolution of microstructured fiber (MOF) during its drawing process, given initial preform structure and draw conditions. The method, applicable broad range MOFs with high air-filling fraction thin glass membranes, is an extension Discrete Element Method; it determines forces on nodes in microstructure progressively update their position along neck-down region, until reaches final frozen state. validated through simulation 6 Hollow...
Hollow-core fibers (HCFs) are a potentially transformative fiber technology, where light is confined within hollow core surrounded by cladding composed of air holes defined glass membranes. Dramatic reductions in the minimum losses achieved HCF driving forward their application low-latency data transmission and ultra-high-power delivery, maximizing performance increasing interest. Here, we demonstrate that introducing an extremely small gas-induced differential refractive index (GDRI)...
Specialty optical fibers, in particular microstructured and multi-material have complex geometry terms of structure and/or material composition. Their fabrication, although rapidly developing, is still at a very early stage development compared with conventional fibers. Structural characterization these fibers during every step their multi-stage fabrication process paramount to optimize the fiber-drawing process. The complexity restricts use refractometry microscopy techniques determine...