| Autor: |
Aus der Au, J., Loesel, F. H., Morier-Genoud, F., Moser, M., Keller, U. |
| Zdroj: |
Optics Letters; February 1998, Vol. 23 Issue: 4 p271-273, 3p |
| Abstrakt: |
We have demonstrated 175-fs pulses with 1 W and 300-fs pulses with 1.2 W of average output power at a pulse repetition rate of 117 MHz from a Nd:phosphate (Schott LG 760) glass laser pumped by a 1-cm-wide, 20-W diode laser bar. Stable soliton mode locking was achieved by use of an intracavity semiconductor saturable absorber mirror. We obtained more than 2 W of average power without mode locking. Using cylindrical cavity mirrors, we adapted the laser mode inside the Nd:glass to the highly elliptical pump beam in both dimensions (tangential and sagittal axes) while maintaining a nearly ideal circular TEM_00 output beam with M^2≈1.2 . Overpumping the laser mode in the tangential plane and efficient unidirectional heat removal in the sagittal plane using a 0.8-mm thin Nd:glass also contributed to the good output-beam quality. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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