Pump-degenerate phase-sensitive amplification in chalcogenide waveguides

Zhang, Yanbing; Schröder, Jochen; Husko, Chad; Lefrançois, Simon; Choi, Duk‐Yong; Madden, Steve; Luther‐Davies, Barry; Eggleton, Benjamin J.

doi:10.1364/josab.31.000780

Cited by 25 publications

(13 citation statements)

References 39 publications

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“…Usually, FRBs can be divided into two categories, one is non-repeating and the other is repeating. Accordingly, two class of models have been proposed, namely, the catastrophic model for the non-repeating bursts (Kashiyama et al 2013;Falcke & Rezzolla 2014;Zhang 2014;Geng & Huang 2015;Zhang 2016;Wang et al 2016;Yamasaki et al 2018;Zhang 2017) and the non-catastrophic model for the repeating bursts (Loeb et al 2014;Kulkarni et al 2014;Katz 2016;Gu et al 2016;Dai et al 2016;Lyutikov et al 2016;Metzger et al 2017). So far tens of FRBs have been observed, among which eleven bursts are found to be repeating (Spitler et al 2016;Amiri et al 2019;Andersen et al 2019;Kumar et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Scale-invariance in the repeating fast radio burst 121102

Lin

Sang

2019

Monthly Notices of the Royal Astronomical Society

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The statistical properties of the repeating fast radio burst FRB 121102 are investigated. We find that the cumulative distributions of fluence, flux density, total energy and waiting time can be well fitted by the bent power law. In addition, the probability density functions of fluctuations of fluence, flux density and total energy well follow the Tsallis q-Gaussian distribution. The q values keep steady around q ∼ 2 for different scale intervals, indicating a scale-invariant structure of the bursts. The statistical properties of FRB 121102 are very similar to that of the soft gamma repeater SGR J1550-5418. The underlying physical implications need to be further investigated.

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Section: Introductionmentioning

confidence: 99%

Scale-invariance in the repeating fast radio burst 121102

Lin

Sang

2019

Monthly Notices of the Royal Astronomical Society

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“…Even for large beaming, FRBs seem to be produced by compact objects of stellar origin such as neutron stars, magnetars or gamma-ray bursts (GRBs). In fact, a number of models have been proposed in relation to such objects: delayed collapses of supermassive neutron stars to black holes [7], magnetar flares [8], mergers of binary white dwarfs [9], flaring stars [10], and short GRBs [11]. The radiation mechanism for the coherent emission is unknown.…”

Section: Introductionmentioning

confidence: 99%

Mechanism for fast radio bursts

2016

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Fast radio bursts are mysterious transient sources likely located at cosmological distances. The derived brightness temperatures exceed by many orders of magnitude the self-absorption limit of incoherent synchrotron radiation, implying the operation of a coherent emission process. We propose a radiation mechanism for fast radio bursts where the emission arises from collisionless Bremsstrahlung in strong plasma turbulence excited by relativistic electron beams. We discuss possible astrophysical scenarios in which this process might operate. The emitting region is a turbulent plasma hit by a relativistic jet, where Langmuir plasma waves produce a concentration of intense electrostatic soliton-like regions (cavitons). The resulting radiation is coherent and, under some physical conditions, can be polarised and have a power-law distribution in energy. We obtain radio luminosities in agreement with the inferred values for fast radio bursts. The timescale of the radio flare in some cases can be extremely fast, of the order of 10 −3 s. The mechanism we present here can explain the main features of fast radio bursts and is plausible in different astrophysical sources, such as gamma-ray bursts and some Active Galactic Nuclei.

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“…The origin of the FRBs is currently unknown, with non-cataclysmic models suggesting giant flares from magnetars (see, e.g., Popov & Postnov 2010;Thornton et al 2013;Pen & Connor 2015) and supergiant pulses from extragalactic neutron stars (see, e.g., as possible progenitors. The cataclysmic progenitor theories include NS mergers (Totani 2013) and "blitzars" which occur when a neutron star collapses to a black hole (BH) (Zhang 2014;Falcke & Rezzolla 2014), and the collapse of a strange star crust (Zhang et al 2018). A superluminous supernova interacting with its environment is also proposed as the origin of FRBs (Piro 2016).…”

Section: Introductionmentioning

confidence: 99%

A model of neutron-star–white-dwarf collision for fast radio bursts

Ling

2018

Astrophys Space Sci

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Fast radio bursts (FRBs) with unknown origin emit a huge luminosity (about 1 Jy at 1 GHz) with a duration of milliseconds or less at extragalactic distances estimated from their large dispersion measure (DM). We propose herein a scenario for a collision between a neutron star (NS) and a white dwarf (WD) as the progenitor of the FRBs by considering the burst duration scaling to the collision time and the radio luminosity proportional to the kinetic energy of the collision. The relations among the observed flux density, pulse width, and the DM are derived from the model and compared with the statistical results from the observed FRBs. Although the sample is quite small, we tentatively report a nearly inverse-square correlation between the observed peak flux density and the DM excess, which is an consequence of the assumption that the DM excess (i.e. that not due to our Galaxy) is dominated by the intergalactic medium. We also tentatively note a correlation among the duration of the FRB and the DM excess (possibly interpreted as due to the broadening of the signal in the intergalactic medium) and a correlation among the duration of the FRB and the flux density (shorter burst should be brighter), both roughly in agreement with the proposed model.

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Pump-degenerate phase-sensitive amplification in chalcogenide waveguides

Cited by 25 publications

References 39 publications

Scale-invariance in the repeating fast radio burst 121102

Scale-invariance in the repeating fast radio burst 121102

Mechanism for fast radio bursts

A model of neutron-star–white-dwarf collision for fast radio bursts

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