Instant And Efficient Second-Harmonic Generation And Downconversion In Unprepared Graded-Index Multimode Fibers

Abstract

We show that germanium-doped graded-index multimode silica fibers can exhibit relatively high conversion efficiencies (∼6.5%) for second-harmonic generation when excited at 1064 nm. This frequency-doubling behavior is also found to be accompanied by an effective downconversion. As opposed to previous experiments carried out in single- and few-mode fibers where hours of preparation were required, in our system, these χ 2 related processes occur almost instantaneously. The efficiencies observed in our experiments are, to the best of our knowledge, among the highest ever reported in unprepared fibers.

Publication Date

9-1-2017

Publication Title

Optics Letters

Volume

42

Issue

17

Number of Pages

3478-3481

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.42.003478

Socpus ID

85028616701 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85028616701

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