Abstract

We report $2\times 2$ and $4\times 4$ multimode air-clad holey fiber couplers fabricated by a novel fusion and tapering technique. The devices showed excellent port-to-port coupling uniformity over a wide spectral range of $800–1650\mathrm{nm}$. The $4\times 4$ coupler showed a low insertion loss of $9.9\mathrm{dB}$ and excess loss of $3.9\mathrm{dB}$ at $1310\mathrm{nm}$. Because of its unique air cladding and the high numerical aperture of the holey fiber structure, the device showed strong potential in high-power applications.

© 2005 Optical Society of America

Multimode fiber devices with single-mode performance

S. G. Leon-Saval, T. A. Birks, J. Bland-Hawthorn, and M. Englund
Opt. Lett. 30(19) 2545-2547 (2005)

Double-clad photonic crystal fiber coupler for compact nonlinear optical microscopy imaging

Ling Fu and Min Gu
Opt. Lett. 31(10) 1471-1473 (2006)

Holey fiber tapers with resonance transmission for high-resolution refractive index sensing

Vladimir P. Minkovich, Joel Villatoro, David Monzón-Hernández, Sergio Calixto, Alexander B. Sotsky, and Ludmila I. Sotskaya
Opt. Express 13(19) 7609-7614 (2005)

High-peak-power Tm-doped double-clad fluoride fiber amplifier

Marc Eichhorn
Opt. Lett. 30(24) 3329-3331 (2005)

High-energy and high-peak-power nanosecond pulse generation with beam quality control in 200-µm core highly multimode Yb-doped fiber amplifiers

Ming-Yuan Cheng, Yu-Chung Chang, Almantas Galvanauskas, Pri Mamidipudi, Rupak Changkakoti, and Peter Gatchell
Opt. Lett. 30(4) 358-360 (2005)