Analysis of Abruptly-bent Ridge Ti:LiNbO3 Waveguides by Beam Propagation Method Involving the Runge-Kutta Algorithm

Abstract

We demonstrate that the tolerance of abrupt bending for a ridge-type Ti:LiNbO 3 waveguide is larger than that for the conventional one. All optical performances of the waveguides with different bending angles are simulated and compared by beam propagation method involving the Runge-Kutta algorithm.

A New-type Optical Filter Composed of Multi-stage Directional Couplers lined in Crossover

“…In this way, the authors show that the propagating optical field at the next position (x mDx, z = (l + 1)Dz) is expressed by [1][2]5] (1a) Brought to you by | Kungliga Tekniska Högskolan Authenticated Download Date | 7/14/15 7:35 AM and the symbol k is the vacuum wave number and n 0 is the effective refractive index, respectively. Consider a two-dimensional lightwave propagating along a z-directional optical waveguide.…”

Beam Propagation Analysis of Ridge-type Ti:LiNbO3 Y-junction Waveguides

“…Let k be the vacuum wave number and no be the effective refractive index of the waveguide. With the assumption that the guided lightwave is paraxially propagating and the refractive index distribution is slowly varying, the Runge-Kutta method shows that the x-component of the optical field at the lattice point (x = mAx, y = iAy, ζ = (1 + 1)Δζ) is expressed by [1] …”

“…Recently, a simple algorithm RKBPM [1] was proposed to analyze optical waveguides by combining the finite difference beam propagation method (FDBPM) with the Runge-Kutta method. In this paper, we employ RKBPM to simulate lightwaves propagating along ridgetype Ti:LiNbO 3 Y-junction waveguides and investigate the relation of the optical guidance versus the branch angle.…”

“…The contours of optical fields on the output planes of (a) the conventional and (b) the ridge-type Ti:LiNbO 3 Y-junction waveguides for different branch angles of the conventional Ti:LiNbO 3 channel waveguide[1].…”

A Comparison of three Novel Optical Wavelength Filters with Cascaded Directional Couplers

“…In this work, we propose several new designs to reduce the widths and areas of the filtering devices. And the optical characteristics and performances of our proposed filters are analyzed and presented by the FDBPM with the Runge-Kutta algorithm (RKBPM) because RKBPM is an efficient and simple technique of designing optical waveguides [5][6][7][8][9].…”