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Due to the ultralow saturation properties of the topological insulator (TI), stable and high-power TI-based solid state has become an important issue. In this paper, using a folding V-shaped laser cavity to minimize the residual pump to the broadband saturable absorber, passive Q-switched operations with high power not only at 1.06 $\mu\text{m}$ but at 1.34 $\mu\text{m}$ as well were demonstrated...
We introduce a data acquisition (DAQ) system for frequency-locking in Direct Detection Doppler Wind LIDAR (DWL). In DWL, double-edge technique based on Fabry-Perot etalon is used to detect the frequency shift. Tiny frequency shift could distinctly reflected in amplitude of output pulse from Photomultiplier Tube (PMT). Nevertheless, outgoing laser frequency is sensitive to temperature changes. Moreover,...
We report a multiple-grating design of electro-optic PPLN Bragg deflector can be a broadband electro-optic amplitude modulator. Under identical device length, the operation bandwidth of multiple-grating devices can reach 500 nm and >70% diffraction efficiency.
A stable octave-spanning supercontinuum with excellent beam quality is generated by high-intensity spectral broadening in bulk fused silica plates in a cascaded arrangement.
A dual shaped reflector system based on kinematic and dynamic ray tracing technique is developed to achieve a circular, collimated, and uniform beam from an elliptical Gaussian beam generated by the Quantum Cascade Laser(QCL) applied in terahertz holographic image system. Simulation result shows that the system has achieved ±0.7dB amplitude ripple and ±7 degree phase vibration for the output beam...
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