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Due to the excellent electro-optic properties of lead lanthanum zirconium titanate(ePb; LaTeZr; TiTO3, PLZT),compact 1 × 2 and 1 × 4 PLZT optical switches with a high response speed are proposed and fabricated successfully in this Letter. By introducing a thin isolating layer between the waveguides and the electrodes, the absorption loss of the fabricated 1 × 2 PLZT switch caused by the electrodes is reduced 8.9 d B with a relatively low driving voltage. The 1 × 2 PLZT switch shows an insertion loss of 18.3 d B and crosstalk of-20.5 d B at an applied voltage of 9.5 V. The fabricated 1 × 4 switch array shows an insertion loss of 20.7 d B and a crosstalk of-20.5 d B at an applied voltage of 13 V. The response time of the switches is less than 27 ns, and the device’s size is only 15 mm × 6 mm. The switches can be used in optical communication systems.
Due to the excellent electro-optic properties of lead lanthanum zirconium titanate (ePb; LaTeZr; TiTO3, PLZT), compact 1 × 2 and 1 × 4 PLZT optical switches with a high response speed are proposed and fabricated successfully in this Letter. a thin isolating layer between the waveguides and the electrodes, the absorption loss of the fabricated 1x2 PLZT switch caused by the electrodes is reduced 8.9 d B with a relatively low driving voltage. The 1x2 PLZT switch shows an insertion loss of 18.3 d B and crosstalk of-20.5 d B at an applied voltage of 9.5 V. The fabricated 1 × 4 switch array shows an insertion loss of 20.7 d B and a crosstalk of-20.5 d B at an applied voltage of 13 V. The response time of the switches is less than 27 ns, and the device’s size is only 15 mm × 6 mm. The switches can be used in optical communication systems.