Nanosecond Pulses Generation with Samarium Oxide Film Saturable Absorber

Zulkipli, N.F. and Batumalay, Malathy and Samsamnun, F.S.M. and Mahyuddin, Mohamad Badrol Hisyam and Hanafi, Effariza and Izam, T.F.T.M.N. and Abdul Khudus, Muhammad Imran Mustafa and Harun, Sulaiman Wadi (2019) Nanosecond Pulses Generation with Samarium Oxide Film Saturable Absorber. Chinese Physics Letters, 36 (7). 074203. ISSN 0256-307X

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Official URL: https://doi.org/10.1088/0256-307X/36/7/074203

Abstract

For an electron-electron collision with characteristic scale length larger than the relative gyro-radius of the two colliding electrons, when the initial relative parallel kinetic energy cannot surmount the Coulomb repulsive potential, reflection will occur with interchange of the parallel velocities of the two electrons after the collision. The Fokker-Planck approach is employed to derive the electron collision term R describing parallel velocity scattering due to the reflections for a magnetized plasma where the average electron gyro-radius is much smaller than the Debye length but much larger than the Landau length. The electron parallel velocity friction and diffusion coefficients due to the reflections are evaluated, which are found not to depend on the electron perpendicular velocity. By studying the temporal evolution of the quantity due to R, it is found that R eventually makes the system relax to a state in which the electron parallel velocity distribution is decoupled from the perpendicular velocity distribution.

Item Type: Article
Uncontrolled Keywords: Saturable absorbers; Q switching; Absorber SA
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 31 Oct 2019 03:16
Last Modified: 31 Oct 2019 03:16
URI: http://eprints.um.edu.my/id/eprint/22884

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