This thesis mainly discusses the design, develop and test of the optical data transmission system in RPC readout electronics for Daya Bay neutrino experiment.

Development in the readout system of waveguide multilayer optical card;

In order to overcome the problems of complicate configuration and thermal sensitivity for the current signal readout system of four-frequency differential laser gyros(DLG),a new readout system is developed.

A new vacuum ultraviolet detector is described,its photocathode is a solar-blind,a proximity focus tube with less dispersion and image distortion is adopted,its read-out system has light-coupling and electricity-coupling,the light-coupling read-out system is simpler and responds in real tim.