The effect of pre-pulse on the gratings coded by two interfered femtosecond pulses
Source abstract
Abstract
The effect of pre-pulse on the gratings coded with two interfered femtosecond pulses is studied on silica glass. The results show that the modulation depth of the gratings is deeper than that in absence of pre-pulse, and decreases with increased arrival time of pre-pulse. For the arrival time within 120–200 fs, the free electrons produced by pre-pulse can act as seed electrons for the subsequent interfered pulses to multiply, thus deepening the depth of the gratings. With the arrival time beyond 200 fs, the self-trapped excitons can provide seed electrons for the subsequent pulse multiplying, thus deepening the gratings.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Fiber Laser Technologies · Photorefractive and Nonlinear Optics · Laser Material Processing Techniques
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