Characterisation of a polymeric electro-optic phase modulator for sensing applications

Electro-optic (EO) modulator is a device used primarily in optical communication systems to provide an external optical high-speed bandwidth modulation. Instead, the EO modulator can also be employed as sensing instrument with some modification. In this paper, we demonstrate the performance study of a polymer EO phase modulator compared with the commonly used waveguide material LiNbO₃ to obtain better low insertion loss and length extension. Both parameters are substantial for biosensing applications such as biomedical equipment to detect human body response.