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Demonstration of the linear electro‐optic effect in a thermopoled polymer film

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4 Author(s)
Hill, J.R. ; British Telecom Research Laboratories, Martlesham Heath, Ipswich, IP5 7RE, United Kingdom ; Pantelis, P. ; Abbasi, F. ; Hodge, P.

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We describe an interdigital linear electro‐optic modulator produced from a novel polymer. The polymer was formed into a thin phase grating by simultaneous application of heat and a periodic electric field. The first maximum generated by diffraction of 633‐nm HeNe laser light passing through the grating was electrically modulated to a depth of over 17%. The performance of the modulator is compared with a quadratic electro‐optic modulator having the same electrode structure but where the polymer was replaced by nitrobenzene. It is estimated that the application of a thermopoling field strength of 20 V/μm to the polymer would impart a linear electro‐optic coefficient of about 30 pm/V, which is comparable to the largest coefficient of lithium niobate.

Published in:

Journal of Applied Physics  (Volume:64 ,  Issue: 5 )

Date of Publication:

Sep 1988

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