Supercontinuum generation in photonic crystal fibers with nanoporous core made of soft glass

Opto-Electronics Review

Waddie³

et al. 2012

Self Cite

This paper focuses on the superprism effect which can be obtained in low-contrast photonic crystals. The modelling is related to the newly developed method for all-dielectric photonic crystals. This places material constraints on the simulated crystals which limit the refractive index difference to 0.1 for all-glass photonic crystals and 0.6 for air-glass structures and forces us to focus on hexagonal lattices. The simulations show the existence of superprism effect in both types of structure for realistic glasses. In both cases various linear filling factors are studied in order to maximize the frequency range of the superprism effect. For the air-F2 glass structure it reaches 0.108 normalized frequencies and for the air-NC21 glass structure it reaches 0.99 normalized frequencies for TM polarization. For the double glass structures, the largest range is for the F2/NC21 photonic crystal and spans 0.012 normalized frequencies. In the F2/NC21 crystal the frequency range reaches 0.005 for TE polarization.

Section: Novel Technological Approach To Development Of All-dielectrimentioning

confidence: 99%

Superprism effect in all-glass volumetric photonic crystals

Filipkowski¹,

Opto-Electronics Review

Waddie³

et al. 2012

Self Cite

“…Due to the high refractive index contrast between glass and air, along with freedom of choice of the holes' geometrical parameters, one can precisely control dispersion behaviour and nonlinearity of the fibres [1]. However, this approach has serious techno− logical drawbacks resulting in unintended distortions of the lateral profile that influence the dispersion properties of the fibres [2].…”

Section: Introductionmentioning

confidence: 99%

Dispersion management in soft glass all-solid photonic crystal fibres

Opto-Electronics Review

Pniewski

Pysz

et al. 2012

Self Cite

The development of all-solid photonic crystal fibres for nonlinear optics is an alternative approach to air-glass solid core photonic crystal fibres. The use of soft glasses ensures a high refractive index contrast (> 0.1) and a high nonlinear coefficient of the fibres. We report on the dispersion management capabilities in all-solid photonic crystal fibres taking into account four thermally matched glasses which can be jointly processed using the stack-and-draw fibre technique. We present structures with over 450 nm broadband flat normal dispersion and ultra-flat near zero anomalous dispersion below 5 ps/nm/km over 300 nm dedicated to supercontinuum generation with 1540 nm laser sources. The development of an all-solid photonic crystal fibre made of F2 and NC21 glasses is presented. The fibre is used to demonstrate supercontinuum generation in the range of 730–870 nm (150 nm) with flatness below 5 dB.

“…PCFs based on soft glasses have also been used successfully for broadband supercontinuum generation [2][3][4][5][6]. However, although they can possess a high nonlinear coefficient [7], they also have a high attenuation [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…However, although they can possess a high nonlinear coefficient [7], they also have a high attenuation [8,9]. Therefore they can be used only in the femtoisecond regime where short samples of fibers can be applied [6]. The use of broadband mid infrared (mid-IR) sources in the fields of sensing and spectroscopy has seen a tremendous increase in recent years.…”

Section: Introductionmentioning

confidence: 99%

Toward mid-IR supercontinuum generation in bismuth-lead-galate glass based photonic crystal fibers

Bookey²,

Stępień

et al. 2012

SPIE Proceedings

In this paper we report a two octave spanning supercontinuum generation in the range 750 -3000 nm with a newly developed photonic crystal fiber. The fibre is fabricated using an in-house synthesized lead-bismuth-galate glass PBG08 with optimised rheological and transmission properties in the range 500 -4800 nm. The photonic cladding consists of 8 rings of air holes with a fibre core diameter of 3 μm and a lattice constant of 2.2 μm. The dispersion characteristic is determined mainly by the material dispersion and the first ring of holes in the cladding with a filling factor of 0.68. The filling factor of the remaining 7 rings is 0.45 which allows single mode performance of the fibre in the infrared range. The fibre has a zero dispersion wavelength of 1490 nm which allows the use of 1550 nm wavelength as an efficient pump in the anomalous dispersion regime. The 2 cm long sample of photonic crystal fiber is pumped in the femtosecond regime with a pulse energy of 10 nJ at a wavelength of 1550 nm. A flatness of 5 dB is observed in the spectral range 950 -2500 nm.