Details

Autor(en) / Beteiligte

• Yang, J.
• Kim, J.W.
• Sall, E.G.
• Lee, B.
• Jeong, B.
• Park, S.
• Kim, C.
• Yashin, V.E.
• Kim, G.H.

Titel

Femtosecond laser system based on thin rod active Yb : YAG elements with high average output power and pulse energy

Ist Teil von

• Quantum electronics (Woodbury, N.Y.), 2021-10, Vol.51 (10), p.873-877

Ort / Verlag

Bristol: Kvantovaya Elektronika, Turpion Ltd and IOP Publishing

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A three-stage laser amplifier system based on thin Yb : YAG rods with laser diode pumping has been developed and manufactured. A continuous train of femtosecond pulses from an Yb : KGW master oscillator with a repetition rate of 80 MHz and an initial duration of 150 fs is controlled by a Pockels cell to a frequency of 0.25−1 MHz and is amplified in the system by more than 6500 times to an average power of over 100 W. To suppress self-focusing, the pulses are lengthened in a stretcher on a volume Bragg diffraction grating, amplified, and then compressed to 947 fs. The energy of femtosecond pulses compressed after amplification exceeds 100−170 μJ at different repetition rates, which makes it possible to use them for efficient micromachining of various materials.