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Malakzadeh, A., Zare Kalate, S., Kamjoo, M. (2016). Simulation of Kerr Lens Behavior in a Ti:Sapphire Oscillator with Symmetric and Asymmetric Resenator. Electronic and Cyber Defense, 7(1), 59-70.
Abdollah Malakzadeh; Seyed Reza Zare Kalate; Mohammad Javad Kamjoo. "Simulation of Kerr Lens Behavior in a Ti:Sapphire Oscillator with Symmetric and Asymmetric Resenator". Electronic and Cyber Defense, 7, 1, 2016, 59-70.
Malakzadeh, A., Zare Kalate, S., Kamjoo, M. (2016). 'Simulation of Kerr Lens Behavior in a Ti:Sapphire Oscillator with Symmetric and Asymmetric Resenator', Electronic and Cyber Defense, 7(1), pp. 59-70.
Malakzadeh, A., Zare Kalate, S., Kamjoo, M. Simulation of Kerr Lens Behavior in a Ti:Sapphire Oscillator with Symmetric and Asymmetric Resenator. Electronic and Cyber Defense, 2016; 7(1): 59-70.

Simulation of Kerr Lens Behavior in a Ti:Sapphire Oscillator with Symmetric and Asymmetric Resenator

علوم و فناوریهای پدافند نوین
Article 6, Volume 7, Issue 1 - Serial Number 23, July 2016, Pages 59-70    PDF (979.96 K)
Authors
Abdollah Malakzadeh; Seyed Reza Zare Kalate; Mohammad Javad Kamjoo*
Receive Date: 30 January 2019,  Revise Date: 04 January 2021,  Accept Date: 30 January 2019 
Abstract
Femtosecond pulse lasers are one of the most widely used lasers. Femtosecond oscillator is first step to generate powerful femtosecond pulses. In this work, the laser beam propagation in an oscillator in symmetric and asymmetric designs without Kerr lens effect inside a Ti:Sa medium was simulated and the cavity stable operation conditions have been obtained. Then, Kerr lens modelocking behavior is simulated and  the situation compensating the beam astigmatism is achieved. Split-step method has been used to obtain the beam intensity change in the Ti:Sa rod and shooting method has been utilized to calculate the beam spot size on the first cavity mirror. Assuming no Kerr lens effect, influence of the cavity length changes in laser beam characteristics is investigated and considering the Kerr lens effect in the laser rod, influence of the rod position in the beam characteristics and beam propagation is simulated. Finally, by considering the simulations results, conditions to achieve soft or hard aperture modelocking are discussed.
Keywords
Femtosecond; Oscillator; Kerr Lens Effect; Astigmatism; Modelocking; Soft Aperture Modelocking; Hard Aperture Modelocking
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