Passively Q-switched Tm3+, Ho3+-doped silica fiber laser using a highly nonlinear saturable absorber and dynamic gain pulse compression

Samuli Kivistö*, Riku Koskinen, Jonna Paajaste, Stuart D. Jackson, Mircea Guina, Oleg G. Okhotnikov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

We demonstrate a compact core-pumped 2 μm Tm3+, Ho 3+-doped all-fiber laser passively Q-switched with an antimony-based saturable absorber. The 20 ns pulses are the shortest Q-switched pulses from a fiber laser operating beyond 1850 nm and were produced at a repetition rate of 57 kHz and pulse energy of 15 μJ using a short-length (4 ns) cavity. The large absorber modulation depth of ∼70% together with transient gain compression is shown to provide an efficient mechanism for Q-switched pulse shortening.

Original languageEnglish
Pages (from-to)22058-22063
Number of pages6
JournalOptics Express
Volume16
Issue number26
DOIs
Publication statusPublished - 22 Dec 2008
Externally publishedYes

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