Gratings in Structured Optical Fibres

Figure 2

(a) Experimental setup used to produce the interference patterns and example of the recorded pattern obtained from a 4-ring photonic crystal fibre; (b) SEM cross-section of 4-ring, single material (silica) photonic crystal fibre (Φ_extdiameter∼100𝜇m, 𝜙_hole∼4.5𝜇m, and Λ∼8.5𝜇m). More details in [23].

(a)

(b)