title: Widely tunable extreme UV frequency comb generation.
abstract: Extreme UV (XUV) frequency comb generation in the wavelength range of 51 to 85 nm is reported based on high-order harmonic generation of two consecutive IR frequency comb pulses that were amplified in an optical parametric chirped pulse amplifier. The versatility of the system is demonstrated by recording direct XUV frequency comb excitation signals in He, Ne, and Ar with visibilities of up to 61%.
authors.affiliation: LaserLaB Amsterdam, Institute for Lasers, Life and Biophotonics, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors.forename: T J
authors.initials: TJ
authors.lastname: Pinkert
authors.forename: D Z
authors.initials: DZ
authors.lastname: Kandula
authors.forename: C
authors.initials: C
authors.lastname: Gohle
authors.forename: I
authors.initials: I
authors.lastname: Barmes
authors.forename: J
authors.initials: J
authors.lastname: Morgenweg
authors.forename: K S E
authors.initials: KS
authors.lastname: Eikema