Hollow Core Fibres and their Applications

Richardson, David J.; Wheeler, Natalie V.; Chen, Y.; Hayes, J. R.; Sandoghchi, Seyed Reza; Jasion, Gregory T.; Bradley, Thomas D.; Fokoua, Eric Numkam; Liu, Z.; Slavı́k, Radan; Horák, Péter; Petrovich, M. N.; Poletti, Francesco

doi:10.1364/ofc.2017.tu3h.1

Cited by 10 publications

(19 citation statements)

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“…Crystalline silicon is transparent in a very wide spectral range from 1.0 to 8.5 μm [137], well covering all the transmission bands of conventional single-mode fiber ranging from 1260 to 1675 nm (i.e., 54 THz including O, E, S, C, L and U bands). Recent breakthroughs in low-loss photonic crystal hollow-core fibers have raised great interest in a transmission window around 2 μm, falling within the amplification range of thulium-doped fiber amplifiers (1700-2100 nm) [138,139], which promises a significant increase in the spectral resource [140]. To date, only a very limited amount of transmission experiments at relatively low rates were demonstrated [141,142] due to the immaturity of the fiber and the lack of high-performance electrooptic components in this new band.…”

Section: Compatibility With Ultrawide-band Systemsmentioning

confidence: 99%

Scaling capacity of fiber-optic transmission systems via silicon photonics

2020

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The tremendous growth of data traffic has spurred a rapid evolution of optical communications for a higher data transmission capacity. Next-generation fiber-optic communication systems will require dramatically increased complexity that cannot be obtained using discrete components. In this context, silicon photonics is quickly maturing. Capable of manipulating electrons and photons on the same platform, this disruptive technology promises to cram more complexity on a single chip, leading to orders-of-magnitude reduction of integrated photonic systems in size, energy, and cost. This paper provides a system perspective and reviews recent progress in silicon photonics probing all dimensions of light to scale the capacity of fiber-optic networks toward terabits-per-second per optical interface and petabits-per-second per transmission link. Firstly, we overview fundamentals and the evolving trends of silicon photonic fabrication process. Then, we focus on recent progress in silicon coherent optical transceivers. Further scaling the system capacity requires multiplexing techniques in all the dimensions of light: wavelength, polarization, and space, for which we have seen impressive demonstrations of on-chip functionalities such as polarization diversity circuits and wavelength- and space-division multiplexers. Despite these advances, large-scale silicon photonic integrated circuits incorporating a variety of active and passive functionalities still face considerable challenges, many of which will eventually be addressed as the technology continues evolving with the entire ecosystem at a fast pace.

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Section: Compatibility With Ultrawide-band Systemsmentioning

confidence: 99%

Scaling capacity of fiber-optic transmission systems via silicon photonics

2020

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“…A radically different route offering promising benefits in short-reach interconnects is the use of the hollow-core fibers (HCFs). The operation of HCFs relies on fundamentally different propagation principles than conventional solid-core optical fibers, since the light is guided in air (i,e, within a low refractive index region [16][17][18]). This characteristic of HCFs introduces a variety of unique advantages over conventional fibers, including low latency, ultralow nonlinearity and the potential for ultralow loss, which make HCF an attractive medium for high-speed telecom applications.…”

Section: Introductionmentioning

confidence: 99%

Multi-Band Direct-Detection Transmission Over an Ultrawide Bandwidth Hollow-Core NANF

Hong

Sakr

Taengnoi

et al. 2020

J. Lightwave Technol.

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In this paper, we report high-speed multi-band direct-detection (DD) transmission over a hollow-core nested antiresonant nodeless fiber (NANF). Thanks to the ultrawide bandwidth of the NANF, we demonstrate dual-band transmission across the O-and C-bands over a ~1-km length of a hollow-core fiber for the first time. Eight wavelength-division multiplexed (WDM) channels were transmitted using 100-Gb/s/ Nyquist 4-ary pulse-amplitude modulation (PAM4) signals, which to the best of our knowledge, is the highest aggregate capacity ever transmitted in a DD hollow-core fiber-based transmission system. Optical pre-amplification was adopted for signal reception in both bands, achieved using an in-house built bismuth-doped optical fibre amplifier (BDFA) and a commercial erbium-doped fiber amplifier (EDFA) in the O-and C-band, respectively. We further demonstrate beyond 100-Gb/s/λ adaptively-loaded discrete multitone (DMT) transmission over the S+C+L-bands using the same NANF, without the use of optical amplification. Our experiments show that apart from fiber loss, the use of the NANF did not introduce any additional transmission penalties. The demonstrated results validate the ultrawide bandwidth and excellent modal purity of the fabricated NANF, which allow beyond 100-Gb/s/ penalty-free transmission over multiple bands, highlighting the potential of this fiber technology for high-speed short-to intermediate-reach applications.

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“…Although we can foresee all of these technologies implemented on the ground for the next 10 years, radical options must be sought for the future. Emerging alternatives rely on novel optical fibers; either via spatial division multiplexing (SDM) to expand capacities at 1550 nm [2], but requiring significant DSP, or exploring fibers that minimize impairments, such as hollow-core photonic bandgap fibers (HC-PBGF) or antiresonant hollow-core fibers, which aim to reduce nonlinearities while improving latency [3]. HC-PBGF, for example, was shown to propagate light at ∼98% of c [4] with a potential minimal loss of ∼0.2 dB∕km around 2000 nm [5].…”

Section: Introductionmentioning

confidence: 99%