Liquid capillary waveguide application in absorbance spectroscopy (Reply to the comment by Byrne and Kaltenbacher)

摘要

Liquid capillary waveguides (Fig. Lb) have been used in marine applications to determine dissolved characteristics of seawater (D'Sa et al. 1999; Zhang 2000). Byrne and Kalten- bacher (2001) in comparing optical characteristics of type I (Fig. La) and type II (Fig. 1b) waveguides attribute spectral nonlinearities in absorbance measurements with type II waveguides to the quartz capillary tubing. We show in this study through a theoretical analysis that in the basence of imperfections in the quartz capillary or the presence of scat- tering particles in the solution being measured, light cannot be trapped in the waveguide quartz wall as suggested by Byrne and Kaltenbacher.