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Phase modulation. When anoptical fieldpasses through a medium with a time-varying index of refraction, the phase of the field is modulated. One can phase modulate a pulse with anexternal electric fieldapplied to an optical crystal that the pulse traverses; however, with its high peak power, ...
The prolonged cycle of laser cladding powder generating a metal molten pool with rapid cooling and solidification due to high-intensity ultrasonic vibration is responsible for the transition of dendrites into granular crystal grains. During the period, the grains in the molten state were perpetually fr...
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A piece of BaF2 crystal with an inverted group velocity relationship to the BBO crystal is employed in DOPA to compensate the temporal walk-off between the pulses and thereby improve the bandwidth and efficiency of the system. As a result, tunable spectra that support few-cycle pulse durations ...
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It is not suitable for most lead crystal due to the lower melting point of the glass. DEEP ETCHING involves the total removal of the top layer of glass. which creates a permanent frosted area on the surface of glass. Smooth to the touch and easily color-filled ...
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The first area relates to formation of different 3D structures, photonic crystals, waveguides, gratings etc. making use of multiple voids (separated or interconnected) created in the different space points of a crystal. For these studies the most important part is the void formation. As it is ...