Holographic edge-illuminated polymer Bragg gratings for dense wavelength division optical filters at 1550 nm

• DOI: 10.1364/ao.42.000778
• Publication Date: 2007-08-16T19:21:32Z
• Authors: Atsushi Sato; Miodrag Scepanovic; Raymond K. Kostuk
• Keywords: Apodization; Diffraction efficiency

We discuss the use of holographic photopolymer materials for as dense wavelength division multiplexing filters in C-band optical communication spectrum. An edge-illuminated hologram configuration is described that effectively extends grating length to achieve narrow band operating near 1550 nm photopolymers are 100-200-microm thick. This enables formation apodized and cascaded filter systems. Rouard's method used examine properties both apodization gratings indicates potential spectral bandwidths (< 0.2 nm) high side-lobe suppression (<-- 30 dB). Initial experimental results with a commercially available provided verify narrowband spectral-transmittance 0.6 ability apodize index profile. The primary limitation design absorption existing materials. Optimizing polymer chemistry at may solve this problem.