title: Fiber-integrated frequency-doubling of a picosecond Raman laser to 560 nm.
abstract: We report the development of a fiber-integrated picosecond source at 560 nm by second harmonic generation of a Raman fiber laser. A picosecond ytterbium master oscillator power fiber amplifier is used to pulse-pump a Raman amplifier, which is seeded by a continuous wave distributed feedback laser diode operating at 1120 nm. The pulse train generated at 1120 nm is frequency-doubled in a fiber-coupled periodically-poled lithium niobate crystal module, producing 450 mW of average power at 560 nm with a pulse duration of 150 ps at a repetition rate of 47.5 MHz. The near diffraction-limited (M(2) = 1.02) collimated output beam is ideal for super-resolution microscopy applications.
authors.forename: T H
authors.initials: TH
authors.lastname: Runcorn
authors.forename: T
authors.initials: T
authors.lastname: Legg
authors.forename: R T
authors.initials: RT
authors.lastname: Murray
authors.forename: E J R
authors.initials: EJ
authors.lastname: Kelleher
authors.forename: S V
authors.initials: SV
authors.lastname: Popov
authors.forename: J R
authors.initials: JR
authors.lastname: Taylor