Tunable acousto-optical
filters are capable of fast selection of a given signal from other optical
signals in a fiber. In modern advanced multiwavelength optical network
information is transmitted in a number of independent channels. In particular,
these channels are usually positioned at wavelengths in the spectral
range from 1530 to 1565 nm. In a typical wavelength division multiplexed
(WDM) system, each optical channel is controlled separately because
it contains independent data, thus providing multiplexing of the information
transmitted along the fiber line. Typical features of the TeO2
based AOTF, intended for 1550 nm WDM systems are following: |