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A Study on the Acousto-Optical Wavelength Tunable Filters Utilizing Tapered Directional Coupler SAW Guides  

Jeong, Gi-Jo (Hongik University)
Kim, Jeong-Hui (Hongik University)
Jeong, Hong-Sik (Dept. of Electronic Electrical and Computer Engineering, Hongik University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.39, no.1, 2002 , pp. 58-66 More about this Journal
Abstract
Acousto-optical wavelength tunable optical filters in LiNbO$_3$ have been demonstrated using taperd directional weighted coupling acoustic waveguides and Ti double diffusion technique. Conversion efficiency in excess of 61%, 86% and sidelobe intensity of -14.29㏈, -14.99㏈ were measured at a wavelength of 1551.1nm RF frequency of 173.58MHz and RF power of 35㎽ for both TE and TM input polarizations, respectivelv. A spectral width of ~l.8nm and linear tuning late of 8.6nm/MHz were demonstrated. A 2.82$mutextrm{s}$ switching time has been measured. With two channels with 2.5nmseparation, channel cross-talk was lower than -l4㏈ for single wavelength filtering due to sidelobe.
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Times Cited By KSCI : 2  (Citation Analysis)
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