Continuous Operation of a Bragg Diffraction Type Electrooptic Frequency Shifter at 16 GHz with 65% Efficiency | Zendy

Shintaro Hisatake | Zendy; Kenji Hattori | Zendy; Tadao Nagatsuma | Zendy

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Continuous Operation of a Bragg Diffraction Type Electrooptic Frequency Shifter at 16 GHz with 65% Efficiency

Author(s) -

Shintaro Hisatake,

Kenji Hattori,

Tadao Nagatsuma

Publication year - 2012

Publication title -

advances in optical technologies

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.124

H-Index - 25

eISSN - 1687-6407

pISSN - 1687-6393

DOI - 10.1155/2012/676785

Subject(s) - materials science , optics , modulation (music) , phase shift module , diffraction , microwave , waveguide , optoelectronics , diffraction efficiency , fiber bragg grating , frequency modulation , bragg's law , grating , physics , wavelength , insertion loss , electrical engineering , radio frequency , acoustics , engineering , quantum mechanics

We demonstrate for the first time the continuous operation of a Bragg diffraction type electrooptic (EO) frequency shifter using a 16 GHz modulation signal. Becausefrequency shifting is based on the Bragg diffraction from an EO traveling phase grating (ETPG), this device can operate even in the millimeter-wave (>30 GHz) range or higher frequency range. The ETPG is generated based on the interaction between a modulation microwave guided by a microstrip line and a copropagating lightwave guided by a planner waveguide in a domain-engineered LiTaO3 EO crystal. In this work, the modulation power efficiency was improved by a factor of 11 compared with that of bulk devices by thinning the substrate so that the modulation electric field in the optical waveguide was enhanced. A shifting efficiency of 65% was achieved at the modulation power of 3 W

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