Realistic design of a WDM duplexer made from Ti:LiNbO₃optical filters

Abstract

Describes the realistic design of a two-channel demultiplexer made from three nonidentical Ti:LiNbO3 channel-coupled waveguides. The choice of the design parameters arises from the need to achieve the desired performance compatibly with the technological limits imposed by titanium diffusion into lithium niobate and by the mask design rules obtainable with current photolithographic techniques.

Design and Optimization of High Sensitivity Photonic Interferometric Biosensors on Polymeric Waveguides

“…The thickness d and the width w of the waveguides have been suitably chosen in order to ensure, in addition to the single mode behavior, the best response within the range of variability of the refractive index of the biolayer, n bio , from 1.33 to 1.4 [27]. For this purpose, the electromagnetic analysis of the three waveguiding structures was performed by the Refractive Effective Index Method (REIM) [28,29].…”

Accurate model of InxGa1−xAsyP1−y/InP active waveguides for optimal design of switches

“…The first standard simplification for the mathematical difficulty, without losing accuracy, is obtained by applying the effective index method (EIM) [25] to transform the original threedimensional structure problem into a bidimensional one. By following the EIM, we put @=@x ¼ 0 and the e.m. field can be obtained by solving the equations:…”

Refined modeling of traveling-wave Ti:LiNbO3channel waveguide modulator

“…The optical analysis of the channel waveguide is carried out via an improved version of the refractive effective index method (REIM) [9]. Briefly, we remember that the characteristics of quasi-TE (quasi-TM) modes are obtained in the first application by putting d / d y = 0 in the Maxwell equations and calculating the effective temporary refraction index net as the zero of the dispersion equation of TE (TM) mode.…”

“…Curve a) represents the frequency response assuming that gef = 21.5 as calculated by the multiple-image method and the 6-dB bandwidth is 4.9 GHz; curve b) considers the dispersion effect E,&w) [9]; curve c) accounts for the losses (Y = 1.5 dB/(cm . CHz'/'); and curve d) accounts for both losses and the dispersion effects.…”