Highly Sensitive Sensors Based on Photonic Crystal Fiber Modal Interferometers
Figure 4
The top micrographs are the cross-section of some PCFs employed to fabricate tapers and the lateral view of the expanding zone of a taper. The middle drawing is a diagram of interferometers built with tapered PCFs. and are, respectively, the length and width of the taper waist. The bottom drawing represents the transmission measuring setup.