Klein Tunneling of Light in Fiber Bragg Gratings

Figure 3

Numerically computed spectral transmittance of FBGs used in numerical simulations of Figure 2 for 𝑛₀=1.45, Δ𝑛=3.3×10⁻⁴, and 𝜆_𝐵=1560 nm, corresponding to a grating length 𝐿≃24 cm, and for increasing values of 𝑙: (a) 𝑙=0.1, (b) 𝑙=1.5, and (c) 𝑙=5.

(a)

(b)

(c)