| Issue |
EPL
Volume 89, Number 6, March 2010
|
|
|---|---|---|
| Article Number | 64005 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/89/64005 | |
| Published online | 07 April 2010 | |
Tunability of a seeded free-electron laser through frequency pulling
1
Sincrotrone Trieste - S.S. 14 km 163.5, Trieste, Italy, EU
2
Physics Department, Nova Gorica University - Nova Gorica, Slovenia, EU
Corresponding author: enrico.allaria@elettra.trieste.it
Received:
30
September
2009
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
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