Avoided-crossing-based liquid-crystal photonic-bandgap notch filter.
We demonstrate a highly tunable deep notch filter realized in a liquid-crystal photonic-bandgap (LCPBG) fiber. The filter is realized without inducing a long-period grating in the fiber but simply by filling a solid-core photonic-crystal fiber with a liquid crystal and exploiting avoided crossings within the bandgap of the LCPBG fiber. The filter is demonstrated experimentally and investigated using numerical simulations. A high degree of tuning of the spectral position of the deep notch is also demonstrated.
Noordegraaf
Danny
D
COM-DTU Department of Communications, Optics and Materials, Technical University of Denmark, DK-2800, Denmark. dno@com.dtu.dk
Scolari
Lara
L
Laegsgaard
Jesper
J
Tanggaard Alkeskjold
Thomas
T
Tartarini
Giovanni
G
Borelli
Elena
E
Bassi
Paolo
P
Li
Jun
J
Wu
Shin-Tson
ST