Abstract
A third-order correlator was built based on the technique of cross-correlation between the fundamental and second harmonic waves of femtosecond lasers. Using this correlator, the contrast ratio of femtosecond laser pulses from a typical CPA laser system was measured. The measurements show that the contrast ratio of the system is about 106. There is a strong ASE beside the main pulse, lasting for a long time. The seed contrast ratio is about 105. There is a little pulse at the 2ps before the main pulse and a small stage at the two sides of main pulse.
| Original language | English |
|---|---|
| Pages (from-to) | 434-436 |
| Number of pages | 3 |
| Journal | Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams |
| Volume | 16 |
| Issue number | 4 |
| State | Published - Apr 2004 |
| Externally published | Yes |
Keywords
- CPA
- Contrast ratio
- Femtosecond laser
- Third-order correlation