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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 23 — Nov. 18, 2013
  • pp: 29006–29012

Efficient burst mode amplifier for ultra-short pulses based on cryogenically cooled Yb3+:CaF2

Jörg Körner, Joachim Hein, Hartmut Liebetrau, Reinhard Seifert, Diethard Klöpfel, Martin Kahle, Markus Loeser, Mathias Siebold, Ulrich Schramm, and Malte C. Kaluza  »View Author Affiliations

Optics Express, Vol. 21, Issue 23, pp. 29006-29012 (2013)

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We present a novel approach for the amplification of high peak power femtosecond laser pulses at a high repetition rate. This approach is based on an all-diode pumped burst mode laser scheme. In this scheme, pulse bursts with a total duration between 1 and 2 ms are be generated and amplified. They contain 50 to 2000 individual pulses equally spaced in time. The individual pulses have an initial duration of 350 fs and are stretched to 50 ps prior to amplification. The amplifier stage is based on Yb3+:CaF2 cooled to 100 K. In this amplifier, a total output energy in excess of 600 mJ per burst at a repetition rate of 10 Hz is demonstrated. For lower repetition rates the total output energy per burst can be scaled up to 915 mJ using a longer pump duration. This corresponds to an efficiency as high as 25% of extracted energy from absorbed pump energy. This is the highest efficiency, which has so far been demonstrated for a pulsed Yb3+:CaF2 amplifier.

© 2013 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.7090) Lasers and laser optics : Ultrafast lasers
(140.3538) Lasers and laser optics : Lasers, pulsed
(140.3615) Lasers and laser optics : Lasers, ytterbium

ToC Category:
Lasers and Laser Optics

Original Manuscript: July 29, 2013
Revised Manuscript: September 13, 2013
Manuscript Accepted: September 14, 2013
Published: November 15, 2013

Jörg Körner, Joachim Hein, Hartmut Liebetrau, Reinhard Seifert, Diethard Klöpfel, Martin Kahle, Markus Loeser, Mathias Siebold, Ulrich Schramm, and Malte C. Kaluza, "Efficient burst mode amplifier for ultra-short pulses based on cryogenically cooled Yb3+:CaF2," Opt. Express 21, 29006-29012 (2013)

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