Collinear acoustooptic (AO) wavelength separators and switches consisting of an optical
directional coupler have been investigated near the wavelength of 0.6 µm. The fundamental …

All-fiber acoustooptic tunable filters (AOTFs) with bandwidth as small as 2.8 nm were
fabricated from highly uniform, tapered optical fiber. These filters have typical excess loss of …

The Er+ 3-doped fiber amplifier (EDFA) is widely recognized as an ideal optical repeater for
long-distance lightwave transmission systems. However, the gain spectrum of an EDFA is …

It is shown that the controlled multi-tapering of singlemode optical fibres can be considered
as another degree of freedom in tailoring the spectral characteristics of dynamic acousto …

Two novel tap designs are demonstrated based on phase-matched coupling from the
fundamental mode of a fiber to a higher-order core-guided or cladding-guided mode through …

We show that an all-fiber acousto-optic tunable filter based on polarization mode coupling
using torsional acoustic wave is immune to the fiber bend and physical contact in the …

A new efficient in-fiber acoustooptic phase modulator is demonstrated in which the acoustic
wave is focused onto the fiber by reflection from a cylindrical surface. The device exhibits a …

We describe a high performance acoustooptic tunable filter for add-drop application and for
signal equalization in WDM telecommunication crossconnects. It results from a thorough …

An acoustooptic tunable filter is used to compensate for the gain spectrum variations in
multiwavelength lightwave systems containing cascaded fiber amplifiers. Demonstrations of …

Tapered fibre null couplers are used to form high performance acousto-optic devices for
1.55 µm operation. Standard single-mode telecommunications fibre is used throughout …