Figure 1
From: Vortex Shedding Optical Flowmeter based on Photonic Crystal Fiber

(a) Shows the microscopic picture of PCF, (b) shows the zoomed view of holes of PCF and (c) shows the microscopic picture of the collapsed region at SMF-PCF junction.
From: Vortex Shedding Optical Flowmeter based on Photonic Crystal Fiber

(a) Shows the microscopic picture of PCF, (b) shows the zoomed view of holes of PCF and (c) shows the microscopic picture of the collapsed region at SMF-PCF junction.