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Article
A complex multi-notch astronomical filter to suppress the bright infrared sky
A long-standing and profound problem in astronomy is the difficulty in obtaining deep near-infrared observations due to the extreme brightness and variability of the night sky at these wavelengths. A solution ...
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Article
Theoretical shape analysis of tapered fibers using a movable large-zone furnace
To estimate the shape of tapered fibers using tapering machines with movable large-zone furnaces, a new calculation method is proposed based on the discrete deducing method and the principle of the volume cons...
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Chapter
Control of dispersion in photonic crystal fibers
Photonic crystal fibers (PCFs) exploit the large index difference between air and glass to achieve modal properties unattainable by conventional fiber techniques.
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Article
Control of dispersion in photonic crystal fibers
Photonic crystal fibers (PCFs) exploit the large index difference between air and glass to achieve modal properties unattainable by conventional fiber techniques.
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Article
Compact, stable and efficient all-fibre gas cells using hollow-core photonic crystal fibres
Gas-phase lasers small enough to fit in a credit card or hand-held laser pointer could soon become a reality. A hollow-core photonic crystal fibre based gas cell has been developed, containing a tenth of a mic...
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Article
Generation of a spectrally asymmetric third harmonic with unamplified 30-fs Cr:forsterite laser pulses in a tapered fiber
Unamplified subnanojoule 30-fs pulses of Cr:forsterite laser radiation are shown to generate the third-harmonic signal in a tapered fiber. Analysis of the dispersion properties of a tapered fiber indicates the...
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Article
Doubly phase-matched cascaded parametric wave mixing of ultrashort laser pulses
Doubly phase-matched cascaded parametric wave mixing of femtosecond laser pulses in tapered fibers is experimentally demonstrated. Fibers with an appropriately tailored dispersion profile allow simultaneous ph...
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Article
Two-octave spectral broadening of subnanojoule Cr:forsterite femtosecond laser pulses in tapered fibers
Spectral broadening of femtosecond Cr:forsterite laser pulses is enhanced due to the use of tapered fibers. Supercontinuum generation with unamplified subnanojoule femtosecond Cr:forsterite laser pulses is obs...
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Article
Spectral superbroadening of subnanojoule Cr:Forsterite femtosecond laser pulses in a tapered fiber
Spectral superbroadening of subnanojoule femtosecond Cr:forsterite laser pulses is demonstrated for the first time in experiments with a tapered fiber. Coupling 40-fs 0.6-nJ pulses of 1.25-μm Cr:forsterite las...
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Article
Microstructured Silica as an Optical-Fiber Material
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Chapter and Conference Paper
From Scattering to Waveguiding: Photonic Crystal Fibres
Photonic crystals are formed of a regularly patterned microstructured material, with a pitch comparable to the optical wavelength. These materials exhibit unusual optical properties due to the interference of ...
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Chapter
2D Photonic Band Gap Structures in Fibre Form
A structure with a refractive index that varies periodically in three dimensions can fail to transmit light of certain “forbidden” frequencies, despite being non-absorbing. This is because Bragg diffraction, c...
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Chapter
Bound Modes of Two-Dimensional Photonic Crystal Waveguides
It is now widely recognised that a volume of dielectric material with an appropriately designed periodic microstructure — a photonic crystal — will support a full three-dimensional photonic band gap (PBG) [1]. Ov...
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Chapter
Dispersion, Tunability and Applications of Defect Modes in Photonic Band-Gap Structures
Electronic surface states, whose energies lie within the semiconductor band-gap, are normally regarded as a nuisance to be avoided in semiconductor lasers. This is particularly true of micro-pillar laser array...
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Chapter
Bloch Wave Optics in Photonic Crystals: Physics and Applications
We aim in this chapter to provide an introduction to the rich tapestry of physical phenomena involving wave propagation in wavelength-scale periodic structures, and to explore briefly their significance in pre...
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Chapter
A Simple Model for the Shape of Fibre Tapers
A model for the shape of optical fibre tapers is presented which avoids any need for the techniques of fluid mechanics. A theoretical procedure for producing any given shape of taper is described, together wit...
