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Recent advances in polymer integrated-optics technology

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2 Author(s)
Bechtel, James H. ; IPITEK, Carlsbas, CA, USA ; Yacoubian, A.

Traditional EO polymer modulators employ a Mach-Zehnder interferometer architecture with only one arm modulated under a microstrip line electrode. The Vπ of such modulator can be expressed as, Vπ=λh/n3r33LΓ (Eq. 1) where λ is the optical wavelength, h is the gap between electrodes, n is the index of refraction, r33 is the EO coefficient of the polymer waveguide layer, L is the interaction length, and Γ is a modal overlap integral. Low Vπ can be achieved by adjusting one or several parameters in Eq. 1. However, many factors such as reducing the gap distance or increasing the interaction length are limited by optical insertion loss and modulation frequency requirements. The most effective approach for low V, is to increase the EO coefficient r33, and recent work at the University of Southern California has demonstrated some limits to increasing the doping density of the nonlinear chromophores

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Lasers and Electro-Optics Society 2000 Annual Meeting. LEOS 2000. 13th Annual Meeting. IEEE  (Volume:1 )

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