| 摘要 |
A tunable time plate device for providing a continually adjustable time delay between two linearly polarized laser pulses omega 1 and omega 2. The device comprises a time plate made of a parallel flat birefringence crystal having a principal axis of refractive index nz parallel to its surface, and a principal axis of refractive index nx having an angle phi to its surface normal. The time plate is rotatably mounted such that it is rotatable about its nz principal axis for tuning a time delay between the two laser pulses as they travel through the time plate which is a function of an incident angle theta between its surface normal and the propagation direction of the laser pulses. The time delay therefore can be continually adjusted by rotating said time plate to change said incident angle theta .
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