title: Effects of apodization on a holographic demultiplexer based on a photopolymer grating.
abstract: An investigation of the effects of apodization on a holographic demultiplexer that is based on a photopolymer grating is presented. Uniform and Gaussian apodized gratings are fabricated in a DuPont HRF-150-38 photopolymer. From the theoretical and experimental results, the spectral response of the apodized grating has a larger main lobe but lower sidelobes than those in the uniform-grating case. A 42-channel demultiplexer that is based on the Gaussian apodized grating with an 0.4-nm channel spacing is demonstrated. A cross-talk level of -30 dB and an interchannel uniformity of 1.5 dB are archived in the wavelength range of approximately 1550 nm.
authors.affiliation: Department of Computer and Communication Engineering, Chungbuk National University, Gaeshindong, Heungduk-ku, Cheongju, Chungbuk 361-763, Korea. ddd@osp.chungbuk.ac.kr
authors.forename: Duc-Dung
authors.initials: DD
authors.lastname: Do
authors.forename: Nam
authors.initials: N
authors.lastname: Kim
authors.forename: Jun-Won
authors.initials: JW
authors.lastname: An
authors.forename: Kwon-Yeon
authors.initials: KY
authors.lastname: Lee