Ultra-large core birefringent Yb-doped tapered double clad fiber for high power amplifiers
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||12|
|Publication status||Published - 19 Mar 2018|
|Publication type||A1 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).