Title :
Low-loss tunable integrated acoustooptical wavelength filter in LiNbO/sub 3/ with strong sidelobe suppression
Author :
Herrmann, H. ; Schafer, K. ; Schmidt, Ch
Author_Institution :
Inst. fur Angewandte Phys., Paderborn Univ., Germany
Abstract :
An integrated acoustooptical double-stage wavelength filter in LiNbO/sub 3/ has been developed using acoustooptical polarization converters and polarization 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 fiber-to-fiber), low-polarization dependence (0.1 dB) and a strong sidelobe and baseline suppression (>30 dB). Its tuning range exceeds the gain bandwidth of erbium-doped fiber amplifiers around 1550 nm.
Keywords :
acousto-optical filters; diffusion; integrated optics; light polarisation; lithium compounds; optical communication equipment; optical losses; optical polarisers; packaging; tuning; wavelength division multiplexing; 1550 nm; 4.1 dB; LiNbO/sub 3/; Ti-indiffusion technology; acoustooptical polarization converters; baseline suppression; chip; fiber-to-fiber losses; gain bandwidth; integrated acoustooptical double-stage wavelength filter; low insertion losses; low-loss tunable integrated acoustooptical wavelength filter; low-polarization dependence; packaged filter; pigtailed filter; polarization splitters; strong sidelobe suppression; tuning range; Frequency conversion; Insertion loss; Optical fiber filters; Optical filters; Optical frequency conversion; Optical polarization; Optical waveguides; Surface acoustic waves; Tunable circuits and devices; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
