P J Roberts
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Explore the profile of P J Roberts including associated specialties, affiliations and a list of published articles.
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284
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3916
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Recent Articles
11.
Roberts P, Birks T, Russell P, Shepherd T, Atkin D
Opt Lett
. 2009 Oct;
21(7):507-9.
PMID: 19865454
By considering waves that propagate out of the transverse plane, we show that common high-index materials (e.g., GaAs) with a two-dimensional array of air holes can act in some ways...
12.
Caesar B, Morgan-Jones R, Warren R, Wade R, Roberts P, Richardson J
J Bone Joint Surg Br
. 2009 Sep;
91(9):1243-8.
PMID: 19721055
Between November 1994 and June 1999, 35 patients referred to our Problem Fracture Service with chronic diaphyseal osteomyelitis were treated using a closed double-lumen suction irrigation system after reaming and...
13.
Couny F, Benabid F, Roberts P, Burnett M, Maier S
Opt Express
. 2009 Jun;
15(2):325-38.
PMID: 19532248
We report on the experimental visualization of the cladding Bloch-modes of a hollow-core photonic crystal fiber. Both spectral and spatial field nformation is extracted using the approach, which is based...
14.
Roberts P, Williams D, Sabert H, Mangan B, Bird D, Birks T, et al.
Opt Express
. 2009 Jun;
14(16):7329-41.
PMID: 19529102
A practical hollow-core photonic crystal fiber design suitable for attaining low-loss propagation is analyzed. The geometry involves a number of localized elliptical features positioned on the glass ring that surrounds...
15.
Couny F, Roberts P, Birks T, Benabid F
Opt Express
. 2008 Dec;
16(25):20626-36.
PMID: 19065202
We report on the design, fabrication and characterization of silica square-lattice hollow core photonic crystal fibers optimized for low loss guidance over an extended frequency range in the mid-IR region...
16.
Benabid F, Biancalana F, Light P, Couny F, Luiten A, Roberts P, et al.
Opt Lett
. 2008 Nov;
33(22):2680-2.
PMID: 19015707
We observe experimentally, for the first time to our knowledge, the simultaneous emission of two strong conjugate resonant dispersive waves by optical solitons. The effect is observed in a small...
17.
Cerqueira S Jr A, Cordeiro C, Biancalana F, Roberts P, Hernandez-Figueroa H, Brito Cruz C
Opt Lett
. 2008 Sep;
33(18):2080-2.
PMID: 18794937
Nonlinear interaction between spectral components in two different photonic bandgaps is experimentally demonstrated by launching femtosecond pulses near a zero-dispersion wavelength of a hybrid photonic crystal fiber, which guides by...
18.
Laegsgaard J, Roberts P
Opt Express
. 2008 Jun;
16(13):9628-44.
PMID: 18575531
Compression of linearly chirped picosecond pulses in hollow-core photonic bandgap fibers is investigated numerically. The modal properties of the fibers are modeled using the finite-element technique, whereas nonlinear propagation is...
19.
Lewis G, Jordan D, Roberts P
Appl Opt
. 2008 Mar;
38(18):3937-44.
PMID: 18320002
We describe a method for increasing target contrast within a turbid medium by means of the polarization state of the scattered light. The backscattered Mueller matrices for various concentrations of...
20.
Couny F, Benabid F, Roberts P, Light P, Raymer M
Science
. 2007 Nov;
318(5853):1118-21.
PMID: 18006741
Ultrabroad coherent comb-like optical spectra spanning several octaves are a chief ingredient in the emerging field of attoscience. We demonstrate generation and guidance of a three-octave spectral comb, spanning wavelengths...