Abstract
We present multichannel nonlinear optical upconversion of THz signals at 0.137 THz, 0.147 THz, 0.157 THz, 0.167 THz, 0.177 THz and 0.186 THz in a lithium niobate disk resonator. This scheme demonstrates the upconversion of multiple non-resonant THz fields using a resonantly-enhanced continuous-wave optical pump.