Luka Černe (Author), Peter Šušnjar (Author), Rok Petkovšek (Author)

Abstract

We present here a detailed study of a compact and tunable nonlinear phase pre-compensation method based on a tunable chirped fiber Bragg grating (TCFBG) applied to an ultrafast fiber laser system. Frequency resolved optical gating (FROG) measurements reveal a significant variation in the output pulse shape due to the variation in accumulated nonlinear phase for varying pulse energy and repetition rate (even if the pulse energy is kept constant) of the laser system. The TCFBG, used as a stretcher and a pre-compensating element in this chirped fiber amplification (CPA) system, eliminates the need for additional pulse shaping components which greatly simplifies the system for tunable pre-compensation. We demonstrate an efficient pre-compensation of the accumulated nonlinear phase between 0 and 14 rad resulting in pulses with a constant pulse duration and Strehl ratio over a broad operating regime of the laser with repetition rates ranging from 100 kHz up to 30 MHz and pulse energies spanning from 1 [micro]J up to 70 [micro]J.

Keywords

nonlinear phase;femtosecond laser;self-phase modulation;CPA;FROG;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 535(045)
COBISS: 36354563 Link will open in a new window
ISSN: 0030-3992
Views: 32
Downloads: 8
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: nelinearna faza;femtosekundarni laser;samo-modulacija faze;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2022-11-05
Pages: str. 1-9
Issue: ǂVol. ǂ135
Chronology: Mar. 2021
DOI: 10.1016/j.optlastec.2020.106706
ID: 15899494