title: Optical fiber link for transmission of 1-nJ femtosecond laser pulses at 1550 nm.
abstract: We report on numerical and experimental characterization of the performance of a fiber link optimized for the delivery of sub-100-fs laser pulses at 1550 nm over several meters of fiber. We investigate the power handling capacity of the link, and demonstrate all-fiber delivery of 1-nJ pulses over a distance of 5.3 m. The fiber link consists of dispersion-compensating fiber (DCF) and standard single-mode fiber. The optical pulses at different positions in the fiber link are measured using frequency-resolved optical gating (FROG). The results are compared with numerical simulations of the pulse propagation based on the generalized nonlinear Schrödinger equation. The high input power capacity of the fiber link allows the splitting and distribution of femtosecond pulses to an array of fibers with applications in multi-channel fiber-coupled terahertz time-domain spectroscopy and imaging systems. We demonstrate THz pulse generation and detection using a distributed fiber link with 32 channels and 2.6 nJ input pulse energy.
authors.affiliation: DTU Fotonik, Technical University of Denmark, DK-2800 Lyngby, Denmark.
authors.forename: Finn
authors.initials: F
authors.lastname: Eichhorn
authors.forename: Rasmus Kjelsmark
authors.initials: RK
authors.lastname: Olsson
authors.forename: Jonas C D
authors.initials: JC
authors.lastname: Buron
authors.forename: Lars
authors.initials: L
authors.lastname: Grüner-Nielsen
authors.forename: Jens Engholm
authors.initials: JE
authors.lastname: Pedersen
authors.forename: Peter Uhd
authors.initials: PU
authors.lastname: Jepsen
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004867:Equipment Design; D005336:Fiber Optic Technology; D007834:Lasers; D055100:Optical Fibers; D055095:Optics and Photonics; D010825:Physics / Q000379:methods; D055068:Terahertz Spectroscopy / Q000379:methods; D013997:Time Factors