INFRARED TO VISIBLE CONVERSION IN RARE-EARTH-DOPED PLANAR WAVE-GUIDES

The first observation of optical properties of new rare-earth-doped vi treous fluoride waveguides has been recently reported. These vitreous fluoride films have been deposited by a physical vapour deposition tec hnique on fluoride substrates. Several PZG films and sandwiches deposi ted on various substrates have been prepared with thickness of a few p m and doped in the guiding layer by various amounts of erbium and othe r rare-earth ions. High delta n/n (10(-2)) has been achieved as a resu lt of the glass compositions. Infrared as well as green and blue upcon version pumped fluorescences have been recorded under side light injec tion.