title: Fiber-based dual-focus time-demultiplexed second harmonic generation microscopy.
abstract: We present a dual-focus second harmonic generation (SHG) microscopy approach based on stable, compact, and inexpensive fiber technology. One-tenth of the fiber laser output is coupled into a 100 m (≙500  ns) long single-mode fiber and further amplified to achieve two separately guided beams with time-alternating pulse trains. SHG detection is performed sequentially, generating two individual images in one scan. Thus, the configuration allows for imaging of distinct areas within the field of view at twice the repetition rate of the fiber laser but is readily extended to a multiple of the repetition rate with tens of foci.
authors.forename: Sandro
authors.initials: S
authors.lastname: Heuke
authors.forename: Fisseha Bekele
authors.initials: FB
authors.lastname: Legesse
authors.forename: Adrian
authors.initials: A
authors.lastname: Lorenz
authors.forename: Torbjön
authors.initials: T
authors.lastname: Pascher
authors.forename: Denis
authors.initials: D
authors.lastname: Akimov
authors.forename: Matthias
authors.initials: M
authors.lastname: Jäger
authors.forename: Michael
authors.initials: M
authors.lastname: Schmitt
authors.forename: Jürgen
authors.initials: J
authors.lastname: Popp