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http://dx.doi.org/10.9766/KIMST.2021.24.6.610

Design and Manufacture of Traveling-wave Electro-optic Modulator for X-band LFM Signal Generation  

Yi, Minwoo (Advanced Defense Science and Technology Research Institute, Agency for Defense Development)
Yoo, Sungjun (Advanced Defense Science and Technology Research Institute, Agency for Defense Development)
Bae, Youngseok (Advanced Defense Science and Technology Research Institute, Agency for Defense Development)
Jang, Sunghoon (Advanced Defense Science and Technology Research Institute, Agency for Defense Development)
Ryoo, Joonhyung (Advanced Defense Science and Technology Research Institute, Agency for Defense Development)
Shin, Jinwoo (Advanced Defense Science and Technology Research Institute, Agency for Defense Development)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.24, no.6, 2021 , pp. 610-618 More about this Journal
Abstract
In this paper, a photonic-based microwave system technology is described, and a traveling-wave electro-optic modulator is designed and manufactured as a key component. The fabricated modulator is composed of a metal diffusion waveguide for optical transmission and a planar waveguide electrode on lithium niobate substrate for microwave transmission. The electro-optic response bandwidth of I and Q channels in a fabricated dual parallel Mach-Zehnder modulator were measured for 27.67 and 28.11 GHz, respectively. Photonic four times up-converted X-band frequency and linear frequency modulated signal were confirmed using the fabricated electro-optic modulator by S-band input signal. The confirmed broadband signal can be applied to a microwave system for surveillance and high-resolution ISAR imaging.
Keywords
Microwave Photnics; Electro-optic Modulator; Diffusion Waveguide; Traveling-wave Electrode;
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