INTEGRATED OPTICAL, WAVELENGTH-SELECTIVE, ACOUSTICALLY TUNABLE 2X2 SWITCHES (ADD-DROP MULTIPLEXERS) IN LINBO3

Fully packaged, polarization independent, integrated acoustooptic 2 x 2 switches have been developed which can be also used as add/drop mult iplexers, The devices have been fabricated in X-cut Y-propagating LiNb O3 and can be operated at wavelengths around 1550 nm, They consist of passive polarization splitters and acoustooptic TE-TM converters with weighted coupling, A filter bandwidth of 2.0 nm and a tuning range of 130 nm have been obtained, The fiber-to-fiber insertion loss is < 4.6 dB and a residual polarization dependence of 1.3 dB for bar-state and 0.1 dB for cross-state routing has been achieved.