Abstract
The features of chirped-pulse oscillators (CPO), which are used for repairing photomasks, is discussed. CPO consists of a standard Kerr-lens modelocked femtosecond oscillator and is pumped by a single continuous-wave Nd:YVO 4 laser. CPO works in the positive-dispersion regime, and thus the pulse duration is stretched to picoseconds inside of the cavity. A spectral width of more than 50 nm FWHM (full width at half maximum) centered at 800 nm is generated as result of high intracavity pulse energy and the dispersion is controlled over a bandwidth of more than 100 nm by the use of dispersive mirrors (DMs).
| Original language | English |
|---|---|
| Pages | 135-140 |
| Number of pages | 6 |
| Volume | 40 |
| No. | 6 |
| Specialist publication | Laser Focus World |
| Publication status | Published - Jun 2004 |
| Externally published | Yes |