
Fig. 1
Variation of absorbance with wavelength.

Fig. 2
Experimental setup.

Fig. 3
Transmission power vs. alcohol concentration measured using 650 nm light source for 5 cm cladding removed optical fiber exposed to alcohol solution.

Fig. 4
Transmission power vs. ammonia concentration measured using 650 nm light source for 5 cm cladding removed optical fiber exposed to ammonia solution.