Electro-optically tunable, narrowband Ti:LiNbO3 wavelength filter
Electronics Letters, Volume 23, Issue 11, 21 May 1987, p. 572 – 574

We report a tunable optical transmission filter for 1.5μn with a bandwidth of 12 Å and a tuning range of at least 80 Å. The filter is based on wavelength-dependent polarisation conversion in a birefringent waveguide and employs a periodic electrode structure with interleaved birefringence tuning electrodes.