Mid-infrared supercontinuum generation to 125μm in large NA chalcogenide step-index fibres pumped at 45μm

Kubat, Irnis; Agger, Christian; Møller, Uffe; Seddon, Angela B.; Tang, Zhuoqi; Sujecki, Sławomir; Benson, T.M.; Furniss, David; Lamrini, Samir; Scholle, Karsten; Fuhrberg, P.; Napier, Bruce; Farries, M.C.; Ward, J.; Moselund, Peter M.; Bang, Ole

doi:10.1364/oe.22.019169

Cited by 87 publications

(41 citation statements)

References 52 publications

(80 reference statements)

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“…A major advantage of chalcogenide glasses is their large ultra-fast nonlinearity amongst all glasses, making them good materials for planar waveguides to generate SC in the MIR [5][6][7][8][9]. A few of these ChG materials such as As 2 S 3 , As 2 Se 3 , Ge 11.5 As 24 S 64.5 and Ge 11.5 As 24 Se 64.5 glasses are highly suitable for making active and passive devices in the MIR region. Amongst them Ge 11.5 As 24 Se 64.5 glass has excellent film-forming properties with high thermal and optical stability under intense illumination [10].…”

Section: Introductionmentioning

confidence: 99%

“…A few of these ChG materials such as As 2 S 3 , As 2 Se 3 , Ge 11.5 As 24 S 64.5 and Ge 11.5 As 24 Se 64.5 glasses are highly suitable for making active and passive devices in the MIR region. Amongst them Ge 11.5 As 24 Se 64.5 glass has excellent film-forming properties with high thermal and optical stability under intense illumination [10]. Recently interest has grown in designing and optimizing planar waveguides made from Ge 11.5 As 24 Se 64.…”

Section: Introductionmentioning

confidence: 99%

“…Amongst them Ge 11.5 As 24 Se 64.5 glass has excellent film-forming properties with high thermal and optical stability under intense illumination [10]. Recently interest has grown in designing and optimizing planar waveguides made from Ge 11.5 As 24 Se 64. 5 chalcogenide glass for broadband MIR SC generation with suitably tailored group-velocity dispersion (GVD), including a zero-dispersion wavelength (ZDW) close to the central wavelength of the pump [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, several experimental and theoretical investigations on mid-infrared SC generation were reported in ChG planar waveguides [13][14][15], ChG fibers [16][17][18][19][20][21][22][23][24][25][26][27][28], single crystal sapphire fibers [29], silicon-on-insulator (SOI) wire waveguides [30], ZBLAN fiber [31], fluoride glass [32] and germano-silicate fibers [33]. Gai et al [13] reported SC generation from 2.9 µm to 4.2 µm in dispersion-engineered As 2 S 3 glass rib waveguide (6.6 cm long) pumped with 7.5 ps duration pulses at a wavelength of 3.26 µm with a pulse peak power of around 2 kW.…”

Section: Introductionmentioning

confidence: 99%

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Mid-infrared supercontinuum generation using dispersion-engineered Ge_115As_24Se_645 chalcogenide channel waveguide

Karim¹,

Rahman²,

Agrawal³

2015

Opt. Express

106

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link Abstract:We numerically investigate mid-infrared supercontinuum (SC) generation in dispersion-engineered, air-clad, Ge 11.5 As 24 Se 64.5 chalcogenide-glass channel waveguides employing two different materials, Ge 11.5 As 24 S 64.5 or MgF 2 glass for their lower cladding. We study the effect of waveguide parameters on the bandwidth of the SC at the output of 1-cm-long waveguide. Our results show that output can vary over a wide range depending on its design and the pump wavelength employed. At the pump wavelength of 2 µm the SC never extended beyond 4.5 µm for any of our designs. However, supercontinuum could be extended to beyond 5 µm for a pump wavelength of 3.1 µm. A broadband SC spanning from 2 µm to 6 µm and extending over 1.5 octave could be generated with a moderate peak power of 500 W at a pump wavelength of 3.1 µm using an air-clad, all-chalcogenide, channel waveguide. We show that SC can be extended even further when MgF 2 glass is used for the lower cladding of chalcogenide waveguide. Our numerical simulations produced SC spectra covering the wavelength range 1.8-7.7 µm (> two octaves) by using this geometry. Both ranges exceed the broadest SC bandwidths reported so far. Moreover, we realize it using 3.1 µm pump source and relatively low peak power pulses. By employing the same pump source, we show that SC spectra can cover a wavelength range of 1.8-11 µm (> 2.5 octaves) in a channel waveguide employing MgF 2 glass for its lower cladding with a moderate peak power of 3000 W.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mid-infrared supercontinuum generation using dispersion-engineered Ge_115As_24Se_645 chalcogenide channel waveguide

Karim¹,

Rahman²,

Agrawal³

2015

Opt. Express

106

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“…By using a longer driving wavelength 660 at 4 µm in a bulk chalcogenide glass a spectrum spanning from 2.5 µm to 7.5 µm could be demonstrated [214]. Simulations indicate that pumping an As-Se chalcogenide fiber at 4.5 µm could generate a spectrum from 3 µm to 12 µm wavelength [215]. Perhaps the currently most interesting material is the fluoride compound ZrF 4 -BaF 2 -LaF 3 -AlF 3 -NaF better known as ZBLAN [216].…”

mentioning

confidence: 98%

Ultrashort pulse generation in the mid-IR

Pires

Baudisch

Sánchez

et al. 2015

Progress in Quantum Electronics

100

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Recent developments in laser sources operating in the mid-IR (3 -8 µm), have been motivated by the numerous possibilities for both fundamental and applied research. One example is the ability to unambiguously detect pollutants and carcinogens due to the much larger oscillator strengths of their absorption features in the mid-IR spectral region compared with the visible. Broadband sources are of particular interest for spectroscopic applications since they remove the need for arduous scanning or several lasers and allow simultaneous use of multiple absorption features thus increasing the confidence level of detection. In addition, sources capable of producing ultrashort and intense mid-IR radiation are gaining relevance in attoscience and strong-field physics due to wavelength scaling of re-collision based processes. In this paper we review the state-of-the-art in sources of coherent, pulsed mid-IR radiation. First we discuss semi-conductor based sources which are compact and turnkey, but typically do not yield short pulse duration. Mid-IR laser gain material based approaches will be discussed, either for direct broadband mid-IR lasers or as narrowband pump lasers for parametric amplification in nonlinear crystals. The main part will focus on mid-IR generation and amplification based on parametric frequency conversion, enabling highest mid-IR peak power pulses. Lastly we close with an overview of nonlinear post-compression techniques, for decreasing pulse duration to the sub-2-optical-cycle regime.

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Optical Fibre Design, Engineering, Fabrication and Characterization

Jha

2016

Inorganic Glasses for Photonics Fundamentals, Engineering, and Applications

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Mid-infrared supercontinuum generation to 125μm in large NA chalcogenide step-index fibres pumped at 45μm

Cited by 87 publications

References 52 publications

Mid-infrared supercontinuum generation using dispersion-engineered Ge_115As_24Se_645 chalcogenide channel waveguide

Mid-infrared supercontinuum generation using dispersion-engineered Ge_115As_24Se_645 chalcogenide channel waveguide

Ultrashort pulse generation in the mid-IR

Optical Fibre Design, Engineering, Fabrication and Characterization

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