Abstract
(Pb,La)(Zr,Ti)O3 (PLZT) has a high electro-optical coefficient and is very attractive for optical waveguide switches with high speed, low driving voltage, and compact size. The $1\times 2$ PLZT optical switch using ridge type Mach–Zehnder interference structure has been designed and fabricated. By introducing offset upper electrodes instead of the conventional top electrodes, the insertion loss of the fabricated $1\times 2$ PLZT optical switch was decreased 9.8 dB significantly with a crosstalk of −25.3 dB and the driving voltage <10 V.
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