title: High-efficiency 10 J diode pumped cryogenic gas cooled Yb:YAG multislab amplifier.
abstract: We report on the first demonstration of a diode-pumped, gas cooled, cryogenic multislab Yb:YAG amplifier. The performance was characterized over a temperature range from 88 to 175 K. A maximum small-signal single-pass longitudinal gain of 11.0 was measured at 88 K. When amplifying nanosecond pulses, recorded output energies were 10.1 J at 1 Hz in a four-pass extraction geometry and 6.4 J at 10 Hz in a three-pass setup, corresponding to optical to optical conversion efficiencies of 21% and 16%, respectively. To our knowledge, this represents the highest pulse energy so far obtained from a cryo-cooled Yb-laser and the highest efficiency from a multijoule diode pumped solid-state laser system.
authors: Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK. saumyabrata.banerjee@stfc.ac.uk
authors: Saumyabrata
authors: S
authors: Banerjee
authors: Klaus
authors: K
authors: Ertel
authors: Paul D
authors: PD
authors: Mason
authors: P Jonathan
authors: PJ
authors: Phillips
authors: Mathias
authors: M
authors: Siebold
authors: Markus
authors: M
authors: Loeser
authors: Cristina
authors: C
authors: Hernandez-Gomez
authors: John L
authors: JL
authors: Collier