Bragg grating device fabrication in undoped PMMA mPOF at 266 nm UV waveleng

We present the first results about Bragg grating devices in undoped PMMA POF fabricated with relative low cost Nd:YAG laser (when compared with excimer lasers) at 266 nm wavelength at low transmission loss in 850 nm region. Then temperature, humidity and strain characterizations are supplied for potential applications.