[Opt. Soc. America Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics - Baltimore, MD, USA (23-28 May 1999)] Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics (IEEE Cat. No.99CH37013) - Switchable narrow bandwidth comb filter based on an acoustooptic superlattice modulator in Sinc-sampled fiber gratings