Femtosecond Yb-doped fiber laser system at 1 μm of wavelength with 100-nm bandwidth and variable pulse structure for accelerator diagnostics

Date
2007-05
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Source Title
8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2007
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Pages
235 - 237
Language
English
Type
Conference Paper
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Abstract

Laser-based diagnostic systems play an increasingly important role in accelerator diagnostics in, for instance, electron bunch length measurements. To date, the laser system of choice for electro-optic experiments has been the Ti:sapphire laser, providing several nanojoules of pulse energies at fixed a repetition rate, which is not well suited to the bunch structure of accelerator facilities such as FLASH. Limited long-term stability and operability of Ti:sapphire systems are significant drawbacks for a continuously running measurement system requiring minimal maintenance and maximum uptime. We propose fiber lasers as a promising alternative with significant advantages. Gating of the pulse train to match the bunch profile is simple with fibercoupled modulators, in contrast to bulk modulators needed for Ti:sapphire lasers. An in-line fiber amplifier can boost the power, such that a constant pulse energy is maintained regardless of the chosen pulse pattern. Significantly, these lasers offer excellent robustness at a fraction of the cost of a Ti:sapphire laser and occupy a fraction of the optical table space.

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Keywords
Accelerator facilities, Diagnostic systems, Electron bunch length measurement, Long term stability, Measurement system, Pulse structures, Ti: Sapphire laser, Yb-doped fiber lasers, Amplifiers (electronic), Fiber amplifiers, Modulators, Particle accelerators, Q switched lasers, Sapphire, Laser diagnostics
Citation
Published Version (Please cite this version)