Results 251 to 260 of about 283,799 (295)

Confinement loss in solid-core photonic bandgap fibers

Optics Communications, 2004
Abstract It is shown in this paper through simulation that the confinement loss of a down-doped solid-core photonic bandgap (PBG) fiber can be reduced to the level of 0.01 dB/km by only 84 air holes, with an air hole diameter to pitch ratio d / Λ =0.8 and air-filling fraction=35%. The practicality of solid-core PBG fibers is thus enhanced.
Ni Yi, An Liang, Xie Yuejian, Zhang Lei, Peng Jiangde   +4 more
exaly   +2 more sources

Diffraction loss of confined modes in microcavities

1997 Digest of the IEEE/LEOS Summer Topical Meeting: Vertical-Cavity Lasers/Technologies for a Global Information Infrastructure/WDM Components Technology/Advanced Semiconductor Lasers and Applications/Gallium Nitride Materials, Processing, and Devices (C, 2002
In this paper, the loss of a simplified cavity is studied using an accurate numerical model that solves the scalar Helmholtz Equation at each point in the cavity. The idealized cavity geometry consists of two perfect mirrors. The upper mirror is offset inward at some radius as shown, so that the cavity is laterally index guided.
G.R. Hadley, K.L. Lear
openaire   +1 more source

Confinement losses in the birefringent holey fibers

Proceedings of 2004 6th International Conference on Transparent Optical Networks (IEEE Cat. No.04EX804), 2004
We calculate and compare confinement losses in birefringent holey fibers of four different constructions. The birefringence in the analyzed structures is induced, respectively, by: two large holes adjacent to the fiber core; the elliptical shape of the core composed of double or triple defects in the hexagonal structure; one row of cladding holes with ...
J. Olszewski, M. Szpulak, W. Urbanczyk
openaire   +1 more source

Confinement loss, including cladding material loss effects, in Bragg fibers

Journal of the Optical Society of America B, 2011
Confinement loss (CL), including cladding material losses, is comprehensively evaluated for TE, TM, and hybrid modes of hollow-core Bragg fibers. We show that the combined fiber loss tends to approach a loss depending only on CL Lconf for a small number N of cladding pairs, while it approaches a material loss limit value Lmat for large N.
Jun-ichi Sakai, Norihiro Nishida
openaire   +1 more source

Simple evaluation of confinement losses in holey fibers

Optics Communications, 2005
An easy-to-evaluate method is described for the prediction of confinement losses in a photonic crystal fiber with a triangular air-hole lattice, also called a holey fiber (HF). First, a HF with a finite number of holes is replaced by a doubly clad fiber with a depressed-index inner cladding and then, a simple expression for leakage losses in the doubly
Masanori Koshiba, Kunimasa Saitoh
openaire   +1 more source

Confinement Losses in Honeycomb Fibers

IEEE Photonics Technology Letters, 2004
The confinement losses in honeycomb photonic bandgap fibers are numerically investigated by means of the finite element method. Honeycomb fibers with both an extra hole and a low refractive index region as defects are considered. It is shown that by means of a proper design, confinement losses lower than 0.1 dB/km at /spl lambda/=1.55 /spl mu/m can be ...
openaire   +2 more sources

Analytical Estimation of Confinement Loss in Tube Lattice Fibers

Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF), 2018
In this work, we propose an analytical formula for estimating confinement loss in Tube Lattice Fibers. The formula is based on a single-tube model and the comparison with numerical simulations of three TLFs designed to work in the UV, NIR, and THz spectral ranges shows good agreement.
Rosa, Lorenzo, Vincetti, Luca
openaire   +2 more sources

Confinement Loss of Tube Lattice and Kagome Fibers

Advanced Photonics, 2011
Confinement loss of two kinds of broad band hollow core fibers, the tube lattice fibers and the kagome fibers, are numerically investigated and compared.
VINCETTI, Luca, SETTI, VALERIO, ZOBOLI, Maurizio   +2 more
openaire   +2 more sources

Measurement of optical loss in oxide-confined VCSELs

IEEE Photonics Conference 2012, 2012
Cold-cavity spectral characteristics are used to extract the size dependent optical loss for small diameter oxide-confined VCSELs. For aperture diameters ≤ 2 µm, the oxide scattering loss can be as large as 10 cm−1.
Stewart T. M. Fryslie, Dominic F. Siriani, Kent D. Choquette   +2 more
openaire   +1 more source

Tailoring confinement losses of photonic crystal fibers

2007 Asia Optical Fiber Communication and Optoelectronics Conference, 2007
Confinement losses in photonic crystal fibers (PCFs) with different structure are discussed by a full vectorial finite element method. Based on numerical results, confinement losses in high birefringence PCFs and high negative dispersion PCFs are tailored.
null Lei Yao, null Shuqin Lou, null Hong Fang, null Tieying Guo, null Honglei Li, null Shuisheng Jian   +5 more
openaire   +1 more source