Hollow-core photonic crystal fibre for high power laser beam delivery

Wang, Xiaocong; Alharbi, Meshaal; Bradley, Thomas D.; Fourcade-Dutin, Coralie; Debord, Benoît; Beaudou, Benoît; Gérôme, F.; Benabid, Fetah

doi:10.1017/hpl.2013.3

Cited by 60 publications

(31 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although there are different types of hollow core fibers, from a simple capillary with high loss to HC-PBGFs with sophisticated structure but very low loss optical guidance, negativecurvature Kagomé structure has proven to be one of the best options for high power laser beam delivery. The ultra-low overlap between core-field and cladding-glass in HC-KF increases the damage threshold beyond that of other fibers' limitations 7 , which allows exploration of the behavior of gas in interaction with ultra-high power pulses over extremely long interaction lengths. Recently introduced negative-curvature core boundary HC-KFs 14,15 have dramatically reduced the attenuation of this type of hollow core fiber and further enhanced the high power delivery capability.…”

Section: Fiber Characteristicsmentioning

confidence: 99%

“…Hollow-Core Photonic Band Gap Fibers (HC-PBGFs) have shown the lowest loss among all hollow core waveguides 5 ; however, their high overlap between the optical field and the cladding-glass significantly decreases the damage threshold in these fibers 6 . On the other hand, hollow core fibers with a Kagomé structure and more specifically with a negative-curvature (hypocycloid) core surround have shown a better balance between loss and power handling, with higher damage threshold for ultra-high power delivery than PBG fibers 7 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exploring nonlinear pulse propagation, Raman frequency conversion and near octave spanning supercontinuum generation in atmospheric air-filled hollow-core Kagomé fiber

et al. 2017

View full text Add to dashboard Cite

We have demonstrated Raman frequency conversion and supercontinuum light generation in a hollow core Kagomé fiber filled with air at atmospheric pressure, and developed a numerical model able to explain the results with good accuracy. A solid-state disk laser was used to launch short pulses (~6ps) at 1030nm into an in-house fabricated hollow core Kagomé fiber with negative core curvature and both ends were open to the atmosphere. The fiber had a 150 THz wide transmission window and a record low loss of ~12 dB/km at the pump wavelength. By gradually increasing the pulse energy up to 250 µJ, we observed the onset of different Kerr and Raman based optical nonlinear processes, resulting in a supercontinuum spanning from 850 to 1600 nm at maximum input power. In order to study the pulse propagation dynamics of the experiment, we used a generalized nonlinear Schrödinger equation (GNLSE). Our simulations showed that the use of a conventional damping oscillator model for the time-dependent response of the rotational Raman component of air was not accurate enough at such high intensities and large pulse widths. Therefore, we adopted a semiquantum Raman model for air, which included the full rotational and vibrational response, and their temperature-induced broadening. With this, our GNLSE results matched well the experimental data, which allowed us to clearly identify the nonlinear phenomena involved in the process. Aside from the technological interest in the high spectral density of the supercontinuum demonstrated, the validated numerical model can provide a valuable optimization tool for gas based nonlinear processes in air-filled fibers.

show abstract

Section: Fiber Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring nonlinear pulse propagation, Raman frequency conversion and near octave spanning supercontinuum generation in atmospheric air-filled hollow-core Kagomé fiber

et al. 2017

View full text Add to dashboard Cite

show abstract

“…This type of hollow-core fiber (HCF), referred to as hollow-core negative curvature fiber (NCF) in this paper (or more broadly named hollow-core anti-resonant fiber (ARF)) shows similar level of transmission loss and single modeness with the maturely developed hollow-core photonic-bandgap fiber (PBGF) and outperforms the PBGF in terms of broadband light guidance and high laser damage threshold. It has found plenty of interdisciplinary applications in areas ranging from ultra-intense pulse delivery [8,9], single-cycle pulse generation [10,11], low latency optical communication [5], UV light sources [12,13], mid-IR gas lasers [14] to biochemical sensing [15,16], quantum optics [17] and mid-IR to Terahertz waveguides [18,19]. In some of these applications, NCF has the potential to revolutionize the research field by realizing unprecedented performances, e.g.…”

Section: Introductionmentioning

confidence: 99%

Confinement loss in hollow-core negative curvature fiber: A multi-layered model

Wang¹,

Ding²

2017

Opt. Express

Self Cite

View full text Add to dashboard Cite

Abstract:Simple structures are always a pursuit but sometimes not easily attainable. It took researchers nearly two decades for conceiving the structure of single-ring hollow-core negative curvature fiber (NCF). Recently NCF eventually approaches to the centre of intense study in fiber optics. The reason behind this slow-pace development is, undoubtfully, its inexplicit guidance mechanism. This paper aims at gaining a clear physical insight into the optical guidance mechanism in NCF. To clarify the origins of light confinement, we boldly disassemble the NCF structure into several layers and develop a multi-layered model. Four physical origins, namely single-path Fresnel transmission through cascaded interfaces, near-grazing incidence, multi-path interference caused by Fresnel reflection, and glass wall shape are revealed and their individual contributions are quantified for the first time. Such an elegant model could not only elucidate the optical guidance in existing types of hollow-core fibers but also assist in design of novel structure for new functions.

show abstract

“…In a next step, we will investigate the possibility of working with other types of HC-PCFs, such as those based on a Kagomé lattice structure with a hypocycloid core that has demonstrated single mode propagation in the 1.55-μm range [31]. This type of fibers can potentially significantly reduce the interferometric noise in the cell transmission, thereby further improving the laser frequency stability of our proposed modulation sideband locking scheme.…”

Section: Discussionmentioning

confidence: 99%