title: Widely-tunable mid-infrared frequency comb source based on difference frequency generation.
abstract: We report on a mid-IR frequency comb source of unprecedented tunability covering the entire 3-10 μm molecular fingerprint region. The system is based on difference frequency generation in a GaSe crystal pumped by a 151 MHz Yb:fiber frequency comb. The process was seeded with Raman-shifted solitons generated in a highly nonlinear suspended-core fiber with the same source. Average powers up to 1.5 mW were achieved at the 4.7 μm wavelength.
authors: LaserLaB Amsterdam, VU University Amsterdam, de Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors: Axel
authors: A
authors: Ruehl
authors: Alessio
authors: A
authors: Gambetta
authors: Ingmar
authors: I
authors: Hartl
authors: Martin E
authors: ME
authors: Fermann
authors: Kjeld S E
authors: KS
authors: Eikema
authors: Marco
authors: M
authors: Marangoni