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Integrated acoustooptic modules for interferometric RF spectrum analyzers

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2 Author(s)
G. D. Xu ; Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA ; C. S. Tsai

An integrated acoustooptic (AO) module that consists of a wideband AO Bragg cell, a wide-angle ion-milled concave Bragg grating lens, and a large-aperture titanium-indiffusion proton-exchange lens has been realized in a y-cut LiNbO/sub 3/ waveguide 1*8*16 mm/sup 3/ in size and used to perform interferometric RF spectrum analysis. This module has provided a bandwidth of 205 MHz centered at 350 MHz and single-tone instantaneous and two-tone, third-order spurious-free dynamic ranges of 50 and 40 dB, respectively, at 1.0 mW of 0.6328- mu m laser power and a drive power of 50 mW per RF signal. A pair of such basic AO modules has been integrated in a common LiNbO/sub 3/ substrate 1*10*16 mm/sup 3/ in size to facilitate measurement of the phase difference, and thus the angle of arrival, of RF signals.<>

Published in:

IEEE Photonics Technology Letters  (Volume:3 ,  Issue: 2 )