| Title |
Didelės smailinės galios lazerio kūrimas taikant kieto kūno, parametrinius ir priverstinės Ramano sklaidos stiprintuvus / |
| Translation of Title |
Development of a high peak power laser based on solid-state, parametric and stimulated Raman amplifiers. |
| Authors |
Mackonis, Paulius |
| DOI |
10.15388/vu.thesis.296 |
| Full Text |
|
| Pages |
148 |
| Keywords [eng] |
laser ; CPA ; OPCPA ; SRS |
| Abstract [eng] |
This thesis describes the generation of ultrashort high peak power laser pulses using optical parametric and stimulated Raman scattering chirped pulse amplifiers (OPCPA and TSRCPA) pumped by a picosecond Yb:YAG laser. The investigations were carried out by experimental optimization of designs and characterization of the output parameters of the pump laser, OPCPA and TSRCPA. The thesis brings together several advanced and rapidly developing solid-state laser technologies. The first part of the thesis presents a Yb:YAG laser system for pumping OPCPA and TSRCPA, generating pulses with a pulse width of 1.15 ps and an energy of 20 mJ. A method for controlling the envelope of single-picosecond pulses using cascade generation of the second harmonic is also described. The second part is devoted to generating a broadband seed for OPCPA and TSRCPA in the visible and infrared spectral range, respectively. The third and fourth parts of the thesis describe the amplification of chirped continuum pulses in optical parametric and stimulated Raman scattering amplifiers. In the first case, broadband pulses with a pulse width of 20 fs, an energy of 2 mJ were generated at a central wavelength of 790 nm. In the second case, pulses with a pulse width of 145 fs and a power of 0.6 mJ were generated at a central wavelength of 1135 nm. The demonstrated TSRCPA efficiency of 55% highlights the advantages of this amplification method over optical parametric amplification, especially when the wavelength is tuned close to the pump laser wavelength. |
| Dissertation Institution |
Valstybinis mokslinių tyrimų institutas Fizinių ir technologijos mokslų centras. |
| Type |
Doctoral thesis |
| Language |
Lithuanian |
| Publication date |
2022 |
