FEL2013 - List of Authors (Peng, M.Y.)

Paper

Title

Page

Long-term Stable, Large-scale, Optical Timing Distribution Systems With Sub-femtosecond Timing Stability

156

M.Y. Peng, P.T. Callahan, F.X. Kaertner, A.H. Nejadmalayeri
MIT, Cambridge, Massachusetts, USA
K. Ahmed, S. Valente, M. Xin
DESY, Hamburg, Germany
P. Battle, T.D. Roberts
AdvR, Inc., Montana, USA
J.M. Fini, L. Grüner-Nielsen, E. Monberg, M. Yan
OFS Laboratories, New Jersey, USA
F.X. Kaertner
CFEL, Hamburg, Germany

Funding: US Department of Energy Contract DE-SC0005262 and Center for Free-Electron Laser Science, DESY, Hamburg
Sub-fs X-ray pulse generation in kilometer-scale FEL facilities will require sub-fs long-term timing stability between optical sources over kilometer distances. We present here key developments towards a completely fiber-coupled, sub-fs optical timing distribution system. Our approach [*] is to lock a femtosecond pulsed laser to a microwave reference and distribute its pulse train through fiber links stabilized by balanced optical cross-correlators (BOCs) [**]. First, we verified that low-noise optical master oscillators for sub-fs timing distribution are available today; the measured jitter for two commercial femtosecond lasers is less than 70 as for frequencies above 1 kHz. Second, we developed a novel 1.2 km dispersion-compensated, polarization-maintaining fiber link to eliminate drifts induced by polarization mode dispersion. Link stabilization for 16 days showed 0.6 fs RMS timing drift and during a 3-day interval only 0.13 fs drift. Lastly, we fabricated a hybrid-integrated BOC using PPKTP waveguides [***] to eliminate alignment drifts and to reduce the link operation power by a factor of 10-100, which will reduce timing errors induced by fiber nonlinearities.
* J. Kim et al., Nat. Photon., 2, 12, 733–736, 2008.
** J. Kim et al., Opt. Lett., 32, 9, 1044–1046, 2007.
*** A. H. Nejadmalayeri et al., Opt. Lett., 34, 16, 2522–2524, 2009.

Slides TUOANO02 [1.387 MB]

Paper	Title	Page
TUOANO02	Long-term Stable, Large-scale, Optical Timing Distribution Systems With Sub-femtosecond Timing Stability	156
	M.Y. Peng, P.T. Callahan, F.X. Kaertner, A.H. Nejadmalayeri MIT, Cambridge, Massachusetts, USA K. Ahmed, S. Valente, M. Xin DESY, Hamburg, Germany P. Battle, T.D. Roberts AdvR, Inc., Montana, USA J.M. Fini, L. Grüner-Nielsen, E. Monberg, M. Yan OFS Laboratories, New Jersey, USA F.X. Kaertner CFEL, Hamburg, Germany
	Funding: US Department of Energy Contract DE-SC0005262 and Center for Free-Electron Laser Science, DESY, Hamburg Sub-fs X-ray pulse generation in kilometer-scale FEL facilities will require sub-fs long-term timing stability between optical sources over kilometer distances. We present here key developments towards a completely fiber-coupled, sub-fs optical timing distribution system. Our approach [] is to lock a femtosecond pulsed laser to a microwave reference and distribute its pulse train through fiber links stabilized by balanced optical cross-correlators (BOCs) []. First, we verified that low-noise optical master oscillators for sub-fs timing distribution are available today; the measured jitter for two commercial femtosecond lasers is less than 70 as for frequencies above 1 kHz. Second, we developed a novel 1.2 km dispersion-compensated, polarization-maintaining fiber link to eliminate drifts induced by polarization mode dispersion. Link stabilization for 16 days showed 0.6 fs RMS timing drift and during a 3-day interval only 0.13 fs drift. Lastly, we fabricated a hybrid-integrated BOC using PPKTP waveguides [*] to eliminate alignment drifts and to reduce the link operation power by a factor of 10-100, which will reduce timing errors induced by fiber nonlinearities. J. Kim et al., Nat. Photon., 2, 12, 733–736, 2008. J. Kim et al., Opt. Lett., 32, 9, 1044–1046, 2007. * A. H. Nejadmalayeri et al., Opt. Lett., 34, 16, 2522–2524, 2009.
	Slides TUOANO02 [1.387 MB]