Abstract

A novel design for a broadband directional coupler based on a photonic crystal fiber is investigated numerically. It is shown that suitable index-depressing doping of the core regions in an index-guiding twin-core photonic crystal fiber can stabilize the coupling coefficient between the cores over an extremely broad (octave-spanning) frequency range.

© 2004 Optical Society of America

Directional coupling in twin-core photonic bandgap fibers

J. Lægsgaard
Opt. Lett. 30(24) 3281-3283 (2005)

Design of dispersion-compensating fibers based on a dual-concentric-core photonic crystal fiber

F. Gérôme, J.-L. Auguste, and J.-M. Blondy
Opt. Lett. 29(23) 2725-2727 (2004)

Doped photonic bandgap fibers for short-wavelength nonlinear devices

Jesper Lægsgaard and Anders Bjarklev
Opt. Lett. 28(10) 783-785 (2003)

Tunable fiber gratings fabricated in photonic crystal fiber by use of mechanical pressure

Jong H. Lim, Kyung S. Lee, Jin C. Kim, and Byeong H. Lee
Opt. Lett. 29(4) 331-333 (2004)

Resonant directional coupling of hollow Bragg fibers

Maksim Skorobogatiy, Kunimasa Saitoh, and Masanori Koshiba
Opt. Lett. 29(18) 2112-2114 (2004)