title: Pulsed degenerate optical parametric oscillator based on a nonlinear-fiber Sagnac interferometer.
abstract: We report operation of an all-fiber degenerate optical parametric oscillator that employs a nonlinear-fiber Sagnac interferometer as a parametric amplifier. Synchronous pumping with 3.9-ps pulses at 1544 nm yields 0.83-ps output pulses. The wide bandwidth of the fiber parametric amplifier causes the oscillator to act as a pulse compressor. The output signal pulses exhibit improved spectral symmetry and a reduced time-bandwidth product compared with the pump pulses. Currently, the net group-velocity dispersion in the passive section of the fiber cavity limits the signal-pulse bandwidth and hence the minimum-obtainable pulse width. This experiment suggests the possibility of frequency conversion by operation of a similar pulsed parametric oscillator away from degeneracy.
authors: D K
authors: DK
authors: Serkland
authors: G D
authors: GD
authors: Bartolini
authors: A
authors: A
authors: Agarwal
authors: P
authors: P
authors: Kumar
authors: W L
authors: WL
authors: Kath