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http://dx.doi.org/10.3807/KJOP.2003.14.1.038

Optical power splitters and optical intensity modulators utilizing Strain-Optic Waveguides of LiNbO3  

정홍식 (홍익대학교 전자전기컴퓨터공학부)
Publication Information
Korean Journal of Optics and Photonics / v.14, no.1, 2003 , pp. 38-43 More about this Journal
Abstract
Fabrication process of strain-induced channel waveguides in $LiNbO_3$ was developed using strain-optic effect and compressional strain due to ~1.4 $\mu\textrm{m}$ surface Mo/Pt metal film. Characterization of the channel waveguides revealed a single transverse and depth mode in both TE and TM polarizations. Measurements showed total insertion loss of 6.2 and 7.7 ㏈/cm for TM and TE polarizations. respectively. Electro-optic intensity modulators with 11 mm long electrode length and 21 $\mu\textrm{m}$ electrode gap at $\lambda$ = 1.15 ${\mu}{\textrm}{m}$have been produced in $LiNbO_3$ substrates using strain-induced channel waveguides. Modulation depth of 100% at $\pi$-radian voltage of 16.1V has been demonstrated. Also, 1$\times$2 on/off power splitters at $\lambda$ = 0.63 $\mu\textrm{m}$ have been produced using strain-induced channel waveguides. On/off voltage of $\pm$ 25V has been demonstrated.
Keywords
strain-optic effect; $LiNbO_3$ electr-optic effect; intensity optical modulator; optical power splitter; integrated optical devices;
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