Integrated-optic acoustically tunable infra-red optical filter
Electronics Letters, Volume 24, Issue 25, 8 December 1988, p. 1562 – 1563

We demonstrate a narrowband (≈1 nm) LiNbO3 acoustically tunable optical filter with a tuning range adequate to span the 1.3–1.55 μm wavelength range, exploiting the considerable advantages of an unconventional x-cut design.