| 摘要 |
PROBLEM TO BE SOLVED: To provide the chirped pulse amplifying device which is simple, inexpensive, and small-sized. SOLUTION: The limits of maximum pulse energy can be evaded by arranging quasi-phase synchronous(QPM) crystal 40 with chirped cycles. The crystal 40 generates a secondary higher harmonic in a single element and pulses expanded by a chirped Bragg grating 20 can be compressed. This constitution makes the device simple and small-sized and the energy of obtained extremely-short pulses substantially increases. Further, the use of this QPM crystal 40 makes possible the variable compensation of a linear and a nonlinear frequency chirp of the secondary higher harmonic. This property is used to make it possible to design the chirp pulse amplifying device which is inexpensive, small-sized, robust, and simple and outputs extremely short pulses. |
