| 摘要 |
<p>The present invention relates to a pulse splitting device (5) adapted to receive irradiation pulses (10) with a central wavelength (1) from a pulsed irradiation source (2) and output a plurality of sub-pulses (11,12,15,17) for each incoming irradiation pulse. The received irradiation pulses and the pulse splitter (5) interacts so that a first and a second sub-pulse (11,12) are temporally separated by a first optical path length (OP1) in a first region and a second optical path length (OP2) in a second region, respectively. The first optical path length (OP1) times the group velocity dispersion (GVD1) with respect to wavelength in the first material, is balanced with the second optical path length (OP2) times the group velocity dispersion (GVD2) with respect to wavelength in the second material, so that the dispersion broadening of the first and the second sub-pulses (11,12) is substantially equal. This facilitates improved subsequent dispersion compensation by both sub-pulses.</p> |
