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Ultra-large core birefringent Yb-doped tapered double clad fiber for high power amplifiers

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)6581-6592
Number of pages12
JournalOptics Express
Issue number6
Publication statusPublished - 19 Mar 2018
Publication typeA1 Journal article-refereed


We present a birefringent Yb-doped tapered double-clad fiber with a record core diameter of 96 μm. An impressive gain of over 38 dB was demonstrated for linearly polarized CW and pulsed sources at a wavelength of 1040 nm. For the CW regime the output power was70 W. For a mode-locked fiber laser a pulse energy of 28 μJ with 292 kW peak power was reached at an average output power of 28 W for a 1 MHz repetition rate. The tapered double-clad fiber has a high value of polarization extinction ratio at 30 dB and is capable of delivering the linearly polarized diffraction-limited beam (M2 = 1.09).

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Field of science, Statistics Finland

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