Specialty Optical Fibers Handbook

23.5.2 Experimental Setups

There are several optical setups for performing EWS. Each setup contains a

tunable light source (tunable laser, monochromator), a detector, and depending

on the examined object, some kind of a sample chamber. One of the most used

systems for EWS is an FTIR. Two typical EWS systems are shown in Fig. 23.9.

The first system (Fig. 23.9a) is known as fiber optic EWS (FEWS) [65]. The

experimental setup uses an FTIR, along with a partially uncladded optical fiber

made of AgBrCl [66] or chalcogenide [67] glass (if the measurement is done in the

MIDIR region) or silica (if the measurement is done in the UV, VIS, or NIR

region). These ...