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KTN-crystal-waveguide-based electro-optic phase modulator with high performance index

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13 Author(s)
S. Toyoda ; NTT Photonics Labs., NTT Corp., Kanagawa, Japan ; K. Fujiura ; M. Sasaura ; K. Enbutsu
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An electro-optic (EO) phase modulator with a low driving voltage that uses newly developed KTa1-xNbxO3 buried waveguides is described. The waveguide layers for the core and cladding were formed using liquid phase epitaxy techniques. The propagation loss was less than 0.5 dB/cm and the polarisation-dependent loss was less than 0.1 dB/cm. The EO phase modulator had a low Vπ×L value of <1.5 cm V (4.0 V biased potential) and a fast response of 3 GHz.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 13 )