Luka Černe (Author), Jaka Petelin (Author), Rok Petkovšek (Author)

Abstract

In this manuscript, an implementation of a tunable nonlinear phase compensation method is demonstrated on a typical femtosecond hybrid laser consisting of a fiber pre-amplifier and an additional solid-state amplifier. This enables one to achieve constant laser pulse parameters over a wide range of pulse repetition rates in such a laser. As the gain in the solid-state amplifier is inversely proportional to the input power, the shortfall in the solid-state gain at higher repetition rates must be compensated for with fiber pre-amplifier to ensure constant pulse energy. This increases the accumulated nonlinear phase and consequently alters the laser pulse parameters such as pulse duration and Strehl ratio. To overcome this issue, the nonlinear phase must be compensated for, and what is more it should be compensated for to a different extent at different pulse repetition rates. This is achieved with a tunable CFBG, used also as a pulse stretcher. Using this concept, we demonstrate that constant laser pulse parameters such as pulse energy, pulse duration and Strehl ratio can be achieved in a hybrid laser regardless of the pulse repetition rate.

Keywords

hibridni laserji;femtosekundni laserji;CPA;variabilen CFBG;hybrid lasers;Femtosecond lasers;tunable CFBG;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 535
COBISS: 76393731 Link will open in a new window
ISSN: 2304-6732
Views: 163
Downloads: 63
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: hibridni laserji;femtosekundni laserji;CPA;variabilen CFBG;
Type (COBISS): Article
Pages: f. 1-10
Volume: ǂVol. ǂ8
Issue: ǂiss. ǂ9
Chronology: Sep. 2021
DOI: 10.3390/photonics8090387
ID: 13418734