Simulation of Frequency Modulation Mode-locking in a Nd:YLF Laser and Investigation of Detuning Influence on the Laser Parameters

Malakzadeh Fard Khangheshlaghi, Abdollah; Kamjoo, Mohammad Javad; Ghaed Rahmati, Mehdi

Simulation of Frequency Modulation Mode-locking in a Nd:YLF Laser and Investigation of Detuning Influence on the Laser Parameters

Authors

Abdollah Malakzadeh Fard Khangheshlaghi

Mohammad Javad Kamjoo

Mehdi Ghaed Rahmati

Abstract

Todays, ultrashort pulse lasers are employed in many branches of science and technology. Surface coating destruction, three dimensional micro or nano-structuring, terahertz wave generation and various spectroscopic techniques such as: ultrashort pulse laser induced breakdown spectroscopy, filament induced breakdown spectroscopy, and also different and several applications in nuclear physics are a portion of ultrashort pulse lasers utilizations. In this work, frequency modulation is firstly overviewed and then active mode-locking using the modulation is investigated in details. The modulation is in fact employed for ultrashort pulse generation by cavity loss modulation or phase changes modulation in a round trip. This can be done using an acousto-optical modulator or an electro-optical modulator. Later the mode-locking in a Nd:YLF laser cavity implementing self-consistent method is simulated. Ultrashort pulses shorter than 40ps with 120nJ energy and a rate of 250MHz are output of the designed oscillator.

Keywords

Frequency Modulation

Mode-locking

Self-consistent