Coherent beam combining of two all-PM thulium-doped fiber chirped pulse amplifiers

In this paper, we report a coherent beam combining (CBC) system that involves two thulium-doped all-polarization maintaining (PM) fiber chirped pulse amplifiers. Through phase-locking the two channels via a fiber stretcher by using the stochastic parallel gradient descent (SPGD) algorithm, a maximum...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Frontiers of Optoelectronics (Online) Ročník 17; číslo 2; s. 14 - 10
Hlavní autori: Ren, Bo, Chang, Hongxiang, Li, Can, Wang, Tao, Jin, Kaikai, Zhang, Jiayi, Guo, Kun, Su, Rongtao, Leng, Jinyong, Zhou, Pu
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Beijing Higher Education Press 28.05.2024
Springer Nature B.V
Springer & Higher Education Press
Predmet:
Accuracy
Amplifiers
Bandwidths
Biomedical Engineering and Bioengineering
Chirped pulse amplifier
Coherent beam combining
Control algorithms
Diodes
Doped fibers
Efficiency
Electrical Engineering
Engineering
Gratings (spectra)
High-average power
Lasers
Noise intensity
Phase error
Physics
Relative intensity noise
Research Article
Spectrum allocation
Thulium
Thulium-doped fiber laser
Coherent beam combining
Chirped pulse amplifier
Thulium-doped fiber laser
High-average power
ISSN:2095-2759, 2095-2767, 2095-2767
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:In this paper, we report a coherent beam combining (CBC) system that involves two thulium-doped all-polarization maintaining (PM) fiber chirped pulse amplifiers. Through phase-locking the two channels via a fiber stretcher by using the stochastic parallel gradient descent (SPGD) algorithm, a maximum average power of 265 W is obtained, with a CBC efficiency of 81% and a residual phase error of λ/17. After de-chirping by a pair of diffraction gratings, the duration of the combined laser pulse is compressed to 690 fs. Taking into account the compression efficiency of 90% and the main peak energy proportion of 91%, the corresponding peak power is calculated to be 4 MW. The laser noise characteristics before and after CBC are examined, and the results indicate that the CBC would degrade the low frequency relative intensity noise (RIN), of which the integration is 1.74% in [100 Hz, 2 MHz] at the maximum combined output power. In addition, the effects of the nonlinear spectrum broadening during chirped pulse amplification on the CBC efficiency are also investigated, showing that a higher extent of pulse stretching is effective in alleviating the spectrum broadening and realizing a higher output power with decent combining efficiency.
Bibliografia:Coherent beam combining
Chirped pulse amplifier
Thulium-doped fiber laser
High-average power
Document received on :2024-02-20
Document accepted on :2024-04-29
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:2095-2759
2095-2767
2095-2767
DOI:10.1007/s12200-024-00117-3