Title :
Optical beam propagation in Ti:LiNbO3 Mach-Zehnder modulator
Author :
Tehranchi, A.H. ; Granpaeh, N.
Author_Institution :
Iran Telecom Res. Center, Tehran, Iran
Abstract :
We simulate, numerically a waveguide Mach-Zehnder modulator, which is one of the most important components due to its application in high-bit-rate optical communication systems. It can be fabricated in z-cut lithium niobate, where the waveguides are formed by titanium diffusion in LiNbO3 substrate. The device has optimized for high extinction ratio and low insertion loss with symmetric branches and arms using the beam propagation method. The method is used with a rather realistic model of the waveguide structure and applied. to z-cut configuration by including the effects of crystal anisotropy, Ti4+ diffusion, and wavelength dispersion of the refractive index distribution.
Keywords :
diffusion; electro-optical modulation; lithium compounds; optical communication equipment; optical dispersion; optical waveguide theory; refractive index; titanium; LiNbO3 substrate; LiNbO3:Ti4+; Ti:LiNbO3 Mach-Zehnder modulator; Ti4+ ion diffusion; beam propagation method; crystal anisotropy; high extinction ratio; high-bit-rate optical communication systems; low insertion loss; optical beam propagation; refractive index distribution; symmetric branches; titanium diffusion; waveguide structure; wavelength dispersion; z-cut configuration; z-cut lithium niobate; Extinction ratio; Lithium niobate; Numerical simulation; Optical beams; Optical fiber communication; Optical propagation; Optical waveguide components; Optical waveguides; Optimization methods; Titanium;
Conference_Titel :
4thLaser and Fiber-Optical Networks Modeling, 2002. Proceedings of LFNM 2002. International Workshop on
Print_ISBN :
0-7803-7372-3
DOI :
10.1109/LFNM.2002.1014134
