High repetition rate picosecond LiNbO3 THz parametric amplifier and parametric gain

Abstract

A high repetition rate, picosecond THz parametric amplifier (TPA) with a LiNbO3 (LN) crystal has been demonstrated in this work. At 10 kHz repetition rate, a peak power of 200 W and an average power of 12 μ have been obtained over a wide range around 2 THz; at 100 kHz repetition rate, a maximum peak power of 18 W and average power of 10.8 μ have been obtained. The parametric gain of the LN crystal was also investigated and a modified Schwarz-Maier model was introduced to interpret the experimental results.

Formation mechanism of femtosecond laser induced guiding structures in y-cut LiNbO3 crystal

“…As one kind of multifunctional optical crystal with great research value, LiNbO 3 crystal owns significant electrooptical properties, and nonlinear optical properties over wideband optical transparency. [26][27][28][29][30] Kinds of optical devices have been realized in integrated systems based on LN, such as electro-optic Q-switch, high-speed modulator, broadband wavelength converter, etc. [31][32][33][34] In this work, we have fabricated the Type-I and Type-II modifications with different processing parameters inside the y-cut LiNbO 3 crystal.…”