Terahertz radiation from a MgO:LiNbO/sub 3/ crystal using a femtosecond pumped enhancement cavity

We report on the generation of broadband terahertz (THz) pulses using Cherenkov-type generation in magnesium oxide doped lithium niobate (MgO:LN). A ring enhancement cavity for the femtosecond pump source led to an increased conversion efficiency for the THz radiation. A silicon prism coupler (PC) attached to the emitting surface of the crystal was used as an output coupler.