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We report a high-efficiency THz parametric oscillator with the THz wave zigzagging inside a slab lithium niobate crystal. When seeded by a signal wave, the device generates a 40-W peak power at 1.8 THz.
We show superior terahertz parametric generation from potassium titanyl phosphate over lithium niobate and lithium tantalate, and demonstrate seeded terahertz parametric amplification in KTP at 5.7 THz.
We demonstrate a 40 W peak power terahertz (THz) wave from an off-axis parametric oscillator by pumping a y-cut monolithic lithium niobate slab crystal with a pulsed laser at 1064 nm. This is a demonstration that, for the first time, a THz parametric oscillator resonates a THz wave, having the advantages of compact size, easy alignment, and high efficiency. The experimental results show that the efficiency...
In this paper, we propose a method based on Helmholtz equation to determine the coupling length of the light propagating in concentrically curved waveguides by the conformal transformation. After the transformation, the concentrically curved waveguides are regarded as straight directional couplers, and the coupling length can be obtained rapidly by using this method. We also calculate the coupling...
When the idler absorption loss exceeds parametric gain in THz DFG, the THz wave can still grow monotonically versus crystal length for forward DFG but saturates within a few absorption lengths for backward DFG.
We show in simulation and experiment the generation of comb-like sidebands and compressed pulses from a beat-wave-seeded optical parametric amplifier. Under suitable group-velocity mismatch, 50-fold pulse compression can be achieved for the output laser pulse.
We show in simulation and experiment the generation of comb-like sidebands and compressed pulses from a beat-wave-seeded optical parametric amplifier. Under suitable group-velocity mismatch, 50-fold pulse compression can be achieved for the output laser pulse.
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