Optical DFG-based 60 GHz signal generation by using a LiTaO3 rectangular waveguide

Yusuke Takashima; Yuto Maejima; Hiroshi Murata; Yasuyuki Okamura; Atsushi Kanno; Tetsuya Kawanishi

doi:10.1587/elex.11.20140381

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Optical DFG-based 60 GHz signal generation by using a LiTaO₃ rectangular waveguide

Yusuke Takashima, Yuto Maejima, Hiroshi Murata, Yasuyuki Okamura, Atsushi Kanno, Tetsuya Kawanishi

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Keywords: rectangular waveguide, nonlinear optical effect, difference frequency generation, polarization reversal, quasi-phase matching, microwave photonics, finite-difference time-domain method

JOURNAL FREE ACCESS

2014 Volume 11 Issue 12 Pages 20140381

DOI https://doi.org/10.1587/elex.11.20140381

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Abstract

Millimeter-wave (MMW) signal generation devices using difference frequency generation (DFG) based on the second order nonlinear optical effect in a rectangular waveguide were studied in detail theoretically and experimentally. The temporal and spatial coupling process of a generated MMW signal to a TE₁₀ mode in a rectangular waveguide embedded with a nonlinear crystal was analyzed using the finite-difference time-domain (FDTD) method. In the experiment, 60 GHz-band signals were successfully obtained from fabricated proto-type devices using a rectangular waveguide embedded with z-cut LiTaO₃ crystal.

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