H. Herrmann et al., LOW-LOSS TUNABLE INTEGRATED ACOUSTOOPTICAL WAVELENGTH FILTER IN LINBO3 WITH STRONG SIDELOBE SUPPRESSION, IEEE photonics technology letters, 10(1), 1998, pp. 120-122
An integrated acoustooptical double-stage wave-length filter in LiNbO3
has been developed using acoustooptical polarization converters and p
olarization splitters as basic components integrated on the same chip.
Ti-indiffusion technology is used throughout to fabricate the device.
The packaged and pigtailed filter has low insertion losses (4.1 dB fi
ber-to-fiber), low-polarization dependence (0.1 dB) and a strong sidel
obe and baseline suppression (>30 dB). Its tuning range exceeds the ga
in bandwidth of erbium-doped fiber amplifiers around 1550 nm.