An in-line fibre-optic intensity modulator is reported that uses evanescent coupling from a fibre to a thin film of electro-optic polymer deposited onto a fiber half coupler. Modulation depths up to 16 dB and low loss (0-6 dB) have been demonstrated.
Fawcett, G., Johnstone, W., Andonovic, I., Bone, D.J., Harvey, T.G., Carter, N. and Ryan, T.G., 1992. In-line fibre-optic intensity modulator using electro-optic polymer. Electronics Letters, 28(11), pp.985-986.
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