Klein Tunneling of Light in Fiber Bragg Gratings

Figure 2

(a)–(c) Pulse propagation in a FBG with an chirp profile 𝑉(𝑧)=(Δ𝑉/2)[1+tanh(𝑧/𝑙)] for Δ𝑉=6 and for (a) 𝑙=0.1, (b) 𝑙=1.5, and (c) 𝑙=5. (d) Profiles of 𝑉=(𝑑𝜙/𝑑𝑧) (upper plot) and of grating amplitude 𝑚(𝑧) (apodization profile, lower plot). The potential 𝑉 is shown for 𝑙=5, corresponding to the simulation of Figure 2(c).

(a)

(b)

(c)

(d)