Waveguide properties

The purpose of this chapter is to propose a general overview of waveguides properties. This short introduction cannot include detailed presentations. For additional information you can refer to a large number of books. We suggest you Jeunhomme, 1990. 

Grewe, M. Grosse, A. Fouckhardt, H., Theoretical and experimental investigations of the optical waveguiding properties of on chip microfabricated capillaries, Appl. Phys. B. 2000,70, S839 S847... 

STRUCTURAL REGULARITY-WAVEGUIDE PROPERTY RELATIONSHIPS OF LANGMUIR-BLODGETT FILMS... 

Multilayer Langmuir-Blodgett films doped with a cyanine dye have been deposited on the surface of a quartz multimode optical fiber and the fluorescence properties investigated. 49 The fluorescence intensity of the films was found to be a periodic function of the number of layers due to the waveguide properties of the films. 

The characteristics of those basic entities like power splitters, combiners, directional couplers etc. can be related to some basic waveguide properties, and the 4-port devices are described by 2 x 2 matrices, Eqs(28),... 

Keller BK, DeGrandpre MD, Palmer CP (2007) Waveguiding properties of fiber-optic capillaries for chemical sensing applications. Sensors Actuators B Chem 125 360-371... 

Another significant class of problems, whose waveguiding properties require a systematic study, is the PCBs that constitute the basic parts of many contemporary telecommunication or computer devices. A general PCB configuration is shown in Figure 7.16. Most components... 

The side chain polymers consist from chemically bound active molecules to the polymer backbone. Here the concentration of active molecules may be strongly increased as compared to the guest-host systems, up to a homopolymer. without a significant loss, in some cases, of waveguiding properties. 

The ASE process occurs in a gain medium whenever the optical confinement is superior, or the decoherence time is short (Section 22.2). The confinement can be described by the radiation leakage rate k, whereas the cooperation among chromophores may be quantified by the Arrechi-Courtens time [112] Tc, which is inversely proportional to the chromophore density in the medium. The value of (kTc) accounts for the relative number of photons emitted by the ASE process [96]. This happens in both polymer solutions (in a cuvette), or in neat polymer films of thickness 100 nm deposited on glass substrates due to optical confinement formed by the film waveguiding properties. 

When the waveguide properties are constant along the z axis, E and Hz vary in the longitudinal direction as Ez, Hz oc exp( )t — yz), where a> = 2itf is the radian frequency of operation and y is a complex number of the form... 

Cossmann, P.H. Romano, V. Sporri, S. Alterman, H.J. Croitoru, N. Frenz, M. Weber, H.P., Plastic Hollow Waveguides Properties and Possibilities as a Flexible Radiation Delivery System for C02-laser Radiation, Lasers in Surgery and Medicine (1995), 16,66-75. 

M. A., and Ribeiro, S.J.L. (2011) Rare earth doped Sn02 nanoscaled powders and coatings enhanced photoluminescence in water and waveguiding properties. /. Nanosci. NantotechnoL, 11 (3), 2433-2439. 

The intense fluorescence of laser-dyes embodied in these thin-film glasses, the simplicity to cast these sol-gel glasses in a multilayered sequence of tailored indices of refraction and the waveguide properties observed in such assemblies imply that such multilayered films may be constructed into a surface-laser. Currently, we are examining these structures as the core of a two dimensional laser and other non-linear optical devices. 

Some research groups have proven the waveguide properties of the laser-induced "writing" on polymer films (23). One could... 

---