Fabrication of waveguides

Fig. 23 Fabrication procedure for microstructured waveguide a fabrication of waveguid-ing film including imprinted surface grating, b fabrication of support, and c assembly of film and support into final waveguide. PDMS poly(dimethylsiloxane) [36]...

Experimental set-up for fabrication of waveguides using femtosecond pulses from Ti Al203 laser is presented in Fig. 2. The laser system produced 130 fs pulses at -800 nm with the repetition rate of 5 kHz and pulse energies up to 0.2 mJ [3]. 

Fabrication of waveguides on-chip is important in microfluidic devices, since optical detection is used for many applications. While microfluidics has made it possible to integrate many fluidic casts on a single chip, most optical components such as light sources and sensors remain off-chip. On-chip waveguides provide an interface between these off-chip optical components and on-chip microfluidics. With the drive towards portable microfluidic systems for point-of-care diagnostics or on-site analysis, it is highly... 

DAMNA) (Figure 1). Frazier et al (6,7) reported the surface polymerization of polydiacetylene films from the photopolymerization of DAMt A monomer solutions. This unique photopolymerization process produces amorphous thin films of polydiacetylene, which can be used in the fabrication of waveguides and photonic devices. However films formed on earth are low quality and have defects that appear to be the result of buoyancy-driven convection. Microgravity experiments on the same system produced very high quality optical films. The lack of in-situ measurements limited the analysis of the effect of gravitational forces on the development of defects in the poyldiacetylene films. 

---