Possibility for mode-locked operation of a femtosecond UV storage ring free-electron laser using a low-loss Fabry–Perot resonator

Parvin, Parviz; Mortazavi, Seyedeh Zahra; Korabaslo, Mohamad Nouri

doi:10.1016/j.optlastec.2012.03.008

Cited by 3 publications

(8 citation statements)

References 33 publications

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“…where 𝐿 𝑢 is the length of the undulator and 𝜆 𝑢 is the wavelength of an electron. The nonhomogeneous broadening is due to energy spread ∈ 𝑠 of the electron beam and emittance ∈ 𝑖 (𝑖 = 𝑥 + 𝑦) as follows (Parvin et al, 2012):…”

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

“…𝑡𝑜𝑡𝑎𝑙 in an FEL for both homogenous and nonhomogeneous effects can be written as (Parvin et al, 2012;Dattoli et al, 1993).…”

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

“…The round-trip time 𝜏 𝑟 of the resonator is equal to the inverse value of the free spectral range (𝐹𝑆𝑅) of the resonator (see Figure 1), which is given by the equation (Parvin et al, 2012;Dattoli et al, 1993;Penzkofer, 1988;Davis, 1996).…”

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

“…where 𝐴 is the absorption loss and 𝑇 the transmittance of the output mirror. It can be calculated by (Parvin et al, 2012):…”

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

“…where 𝑔 0 is the small signal gain per unit length, written by the equation emittance (∈ 𝑖 (𝑖 = 𝑥 + 𝑦) ≈ 0) (Parvin et al, 2012;Dattoli et al, 1993;Penzkofer, 1988;Davis, 1996;Dhedan et al, 2022 ):…”

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

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Ultra-Short Pulses Generation of Free Electron Laser

Al-Aish¹,

Kamil²

2022

BAS-SJKFU

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The major problem facing the development of civil and military laser applications lies in the attempts to obtain short pulses close to the length of the bond that connects the atoms of certain materials. In this paper, an executable program has been constructed to simulate and analyze the generation of ultra-short free electron laser pulses; it contains several parameters directing the creation of short pulses within a time duration of femtoseconds (fs). On analyzing the simulation results, it can be concluded that it is possible to generate ultra-short pulses with a duration of about 7.4 – 87.4 fs with the storage ring free-electron laser Fabry–Perot resonator with noticeably short wavelengths (11.4–190.2) for the output laser beam. KEYWORDS Homogenous broadening; SR-FEL; undulator; energy spread gain; Q- switching

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Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

“…𝑡𝑜𝑡𝑎𝑙 in an FEL for both homogenous and nonhomogeneous effects can be written as (Parvin et al, 2012;Dattoli et al, 1993).…”

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

“…where 𝐴 is the absorption loss and 𝑇 the transmittance of the output mirror. It can be calculated by (Parvin et al, 2012):…”

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

Section: The Technique and Implementation Of The Workmentioning

confidence: 99%

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Ultra-Short Pulses Generation of Free Electron Laser

Al-Aish¹,

Kamil²

2022

BAS-SJKFU

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The theory of stability, bistability, and instability in three-mode class-A lasers

Jahanpanah

Rahdar

2014

Laser Phys.

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Instability is an inevitable and common problem in all different kinds of lasers when they are oscillating in both single-and multi-mode states. Here, the stability conditions are investigated for a three-mode class-A laser. A set of linear equations is derived for the stable oscillation of the cavity central mode together with its left and right adjacent longitudinal modes. The coefficient determinant of stability equations is Hermitian and equal to zero for the roots of two diagonal arrays. In other words, the novelty of our work is to expand the stability coefficient determinant in terms of main diagonal arrays rather than for one row or one column. These diagonal roots lead to two lower and upper boundary curves in the form of a bifurcation. The lower boundary curve mimics the single-mode laser and delimits the instability region (with no above-threshold oscillating mode) from the bistability region (with two above-threshold oscillating modes). The upper boundary curve mimics the two-mode laser and delimits the bistability region from the stability region, in which all three-longitudinal modes are simultaneously oscillating in the above-threshold state.

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Analysis and Simulation the Effect of the Pierce Parameter on the Output of the Free Electron Laser system

Al-Aish

Kamil²

2023

ETJ

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The effect of the Pierce parameter on the performance of the free electron laser system was shown using MATLAB simulation. Pierce parameter values ranged between (0.01 -0.03) for the laser beam with long wavelengths.  The Pierce parameter represents the ratio between the saturation power and electrons power.The free electron laser is considered one of these important and advanced inventions because it provides a laser beam within various wavelengths of the electromagnetic spectrum. In any laser system device, several parameters must be available on which the efficiency and performance of the laser system are dependent. The Pierce parameter is one of the important parameters in measuring the performance quality of the free electron laser. In this paper, the simulation results were obtained using the MATLAB program to show the important effect of the Pierce parameter on the performance of the free electron laser system. The simulation results showed that the values of the Pierce parameter ranged between (0.01 -0.03) for the laser beam with long wavelengths, while it ranged between (0.001-0.0001) for the short wavelengths. The results showed an increase in the efficiency values of the free electron laser system with increasing the values of the Pierce parameter, which represents the ratio between the saturation power and the power of the electron; therefore, it can be used as a specific threshold to measure the efficiency of the laser system. Additionally, the simulation of the Pierce parameter has a direct relation to the small signal gain per unit length.

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Possibility for mode-locked operation of a femtosecond UV storage ring free-electron laser using a low-loss Fabry–Perot resonator

Cited by 3 publications

References 33 publications

Ultra-Short Pulses Generation of Free Electron Laser

Ultra-Short Pulses Generation of Free Electron Laser

The theory of stability, bistability, and instability in three-mode class-A lasers

Analysis and Simulation the Effect of the Pierce Parameter on the Output of the Free Electron Laser system

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