Guided wave optics

Abstract

AAvmcr-Phenomena associated with the propagation and manipulation of light in thin-fh dielectric waveguides are presently the object of q d e n b l e reseuch effort, directed towrat possiile appliations in communications and information pmcesbg. The theory of dieleclric waveguide modes is reviewed, and the topics of directional coupling, input-output coupling, modulation, md distniuted feedback laser sources are treated on the basis of coupled-mode t hemy. A summary of experimental results for each of the guided-wave optical phenomena covered by the theory is also presented. T& invited paper is one of a series planned on topics of general interesr-The Editor.

Low birefringent magneto-optical waveguides fabricated via organic-inorganic sol-gel process

“…Zirconium alkoxide is added to the solution for two reasons. Firstly, to vary the refractive index of the lm in order to meet the fundamental waveguide condition : lm's refractive index must be higher than the substrate's refractive index (Pyrex T M : n=1.47 @ 633 nm) [14,15]. Secondly, to improve the mechanical properties of the lms such as the material elasticity that allows the realization of crack-free transparent coatings [11,16].…”

Investigation of Polymer Optical Waveguide Devices

“…This may produce significant propagation loss [119,120]. It has been demonstrated, at X = 632 nm, that undoped, nonconductive polyanilene, has a dielectric constant £ = 8.47 + 1.14i and conductive, HC1 doped polyanilene has a dielectric constant e = 13.4 + 2.85i [120].…”

Improved coupled-mode theory for codirectionally and contradirectionally coupled waveguide arrays

“…If power is conserved, then dP 2 /dz = 0, which implies that (dFT/dzCF* + FTdC/dzF* + FTCdF*/dz) -(dBT/dzCB* + BTdC/dzB* + B TCdB*/dz) = 0. (17) If, at this point, the coupled-mode equations are written in the alternative form, dF/dz = McF + MGB, dB/dz = Mc*B + MG*F, (18) where …”

“…6 Almost all analyses have been performed with the use of the coupled-mode theory, and representative treatments of single-guide structures can be found in Refs. [17][18][19][20]. The original study of a two-guide device was described in Refs.…”