Tunability of a seeded free-electron laser through frequency pulling
Sincrotrone Trieste - S.S. 14 km 163.5, Trieste, Italy, EU
2 Physics Department, Nova Gorica University - Nova Gorica, Slovenia, EU
Corresponding author: email@example.com
Accepted: 8 March 2010
Frequency pulling is a well-known phenomenon leading to an output frequency shift in a conventional laser, when the cavity and the maximum gain frequencies are detuned. We demonstrate that a similar mechanism is at play in a seeded free-electron laser (FEL), when the seed frequency is out of resonance. Frequency pulling thus may give the possibility of fine-tuning the FEL frequency. On the basis of numerical simulations, we provide a general formula for the FEL output frequency. Such a formula generalizes the one normally used when treating the frequency pulling in conventional lasers.
PACS: 41.60.Cr – Free-electron lasers / 42.55.Ah – General laser theory / 42.65.Ky – Frequency conversion; harmonic generation, including higher-order harmonic generation
© EPLA, 2010