Hybrid Beam Combination by Active Phasing and Bandwidth-Controlled Dichromatic Mirror

Author

Ma, Pengfei ; Jiang, Man ; Wang, Xiaolin ; Ma, Yanxing ; Zhou, Pu ; Liu, Zejin

Author_Institution

College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, China

Volume

27

Issue

19

fYear

2015

Firstpage

2099

Lastpage

2102

Abstract

In this letter, we present what we believe to be a new design for simultaneously coherent and spectral beam combinations by active phasing and bandwidth-controlled dichromatic mirror. A principle of concept experiment is demonstrated by employing eight 20-W power-level polarization-maintained all fiber amplifiers, which generate a 142.1-W near diffraction limited ( $M^{2}_{x}\\sim 1.1$ and $M^{2}_{y}\\sim 1.1$ ) output power with the whole combining efficiency of $>90$ %. The new designed beam combining system is competent for both narrow-band and broadband gain elements with full linewidth of $< 4$ nm. Along with the near-diffraction-limited power scaling progress on monolithic polarization-maintained amplifier, we believe that the approach demonstrated has great potential for remarkable power boosting in both continuous- and pulsed-wave operations.

Keywords

Laser beams; Measurement by laser beam; Optical fiber amplifiers; Optical fiber polarization; Optimized production technology; Power amplifiers; Power generation; Fiber amplifiers; coherent beam combination; spectral beam combination;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2453356

Filename

7152870