OPTICAL SWITCHING OF BTS BAND REJECT RESONATORS

A method for optically switching HTS (High Temperature Superconducting ) band reject resonators is presented. Fast low loss switching of HTS filter elements enable digital selecting of arbitrary pass bands and s topbands. Each switch element must preserve the high Q of the HTS filt er element in one switch state, and remove the HTS filter element with out adding loss in the other state. Patterned pieces of GaAs are used as the switch. Fiber optic cabling is used to bring the optical energy to the cryogenic package. This minimizes the thermal loading of the f ilter package. Cryogenic switching of a single resonator will be discu ssed, as well as integration of the switching method to entire filters and banks of filters. Measured and modeled data will be compared.