Experimental characterization of an off-axis scheme for pumping high-power photonic crystal fiber lasers

Boris Rosenstein, Avry Shirakov, Daniel Belker, Amiel A. Ishaaya

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We experimentally investigate a free-space, off-axis method for pumping high-power photonic crystal fiber (PCF) lasers and amplifiers. The method is based on off-axis injection of the pump beam, exploiting the relatively high numerical aperture of the PCF pump cladding. With this method, we obtain pump coupling efficiency of more than 97 % for incidence angles as high as 30 degrees and show that with more than 60-W pump power the laser efficiency and beam quality do not significantly depend on the incidence angle. Our results indicate that this off-axis pumping method, with its significant advantages over the standard on-axis methods, can be exploited in high-power photonic crystal lasers and amplifiers.

Original languageEnglish
Pages (from-to)327-331
Number of pages5
JournalApplied Physics B: Lasers and Optics
Volume114
Issue number3
DOIs
StatePublished - 1 Mar 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy (all)

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