A 20fs synchronization system for lasers and cavities in accelerators and FELs

R. B. Wilcox; J. M. Byrd; L. R. Doolittle; G. Huang; J. W. Staples

doi:10.1117/12.846253

17 February 2010 A 20fs synchronization system for lasers and cavities in accelerators and FELs

R. B. Wilcox, J. M. Byrd, L. R. Doolittle, G. Huang, J. W. Staples

Proceedings Volume 7581, High Energy/Average Power Lasers and Intense Beam Applications IV; 75810O (2010) https://doi.org/10.1117/12.846253
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

A fiber-optic RF distribution system has been developed for synchronizing lasers and RF plants in short pulse FELs. Typical requirements are 50-100fs rms over time periods from 1ms to several hours. Our system amplitude modulates a CW laser signal, senses fiber length using an interferometer, and feed-forward corrects the RF phase digitally at the receiver. We demonstrate less than 15fs rms error over 12 hours, between two independent channels with a fiber path length difference of 200m and transmitting S-band RF. The system is constructed using standard telecommunications components, and uses regular telecom fiber.

Citation Download Citation

R. B. Wilcox, J. M. Byrd, L. R. Doolittle, G. Huang, and J. W. Staples "A 20fs synchronization system for lasers and cavities in accelerators and FELs", Proc. SPIE 7581, High Energy/Average Power Lasers and Intense Beam Applications IV, 75810O (17 February 2010); https://doi.org/10.1117/12.846253

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