1 kW, 15 μJ linearly polarized fiber laser operating at 977 nm

Abstract

A linearly-polarized, 977 nm pulsed laser capable of 1 kW, 15 µJ output has been demonstrated. The laser is based on Yb 3+ -doped fiber technology, is core pumped and has a monolithic, all-fiber design. A 13 dB polarization extinction ratio was observed at the maximum measured output power. The output performance of the laser is pump-limited and shows no sign of non-linear effects at the demonstrated output powers. The laser emission is inherently near-diffraction limited due to the single-mode nature of the fibers used.

Yb-doped fiber laser system generating 12-ns 0.7-mJ pulses at 82 kHz at 977 nm

“…To the best of our knowledge, the highest performances reported in nanosecond regime for a fiber system operating around 977 nm are still very limited, with demonstration of average power of 110 mW in 15 µJ pulses, at the repetition rate of 7 kHz [9].…”

All-fiber single-mode actively Q-switched laser at 1120 nm

“…At shorter wavelength, pulsed Yb-doped fiber laser at 977 nm is interesting for frequency doubling to blue light. A linearly-polarized pulsed laser with a peak power of 1 kW and pulse energy of 15 µJ was obtained by Khitrov et al using polarization maintaining (PM) LMA 10/125 fiber [9]. With rod-type photonic crystal fiber, millijoule class pulse with a duration of 12 ns was obtained by Boullet et al at a low repetition rate [10].…”

A 100 W all fiber nanosecond linearly polarized ytterbium-doped fiber amplifier

“…In 2006, Ye reported a linearly polarized fiber amplifier, which delivered 53.1 W average power at 40 kHz repetition rate, with a pulse duration of 30 ns and a line-width of 0.7 nm [5]. In 2008, Khitrov reported a pulsed fiber laser, with >10 kW peak power, tunable 2 ns-0.2 µs pulse duration, tunable 50 kHz-50 MHz repetition rate and 50 W average power in diffraction-limited, linearly polarized and stabilized 0.8 nm line-width output beam operation [6]. In 2009, Jiang reported an all fiber linearly polarized pulsed fiber amplifier delivering a diffraction-limited output with an average power of 30 W at a repetition rate of 40 kHz and a pulse duration of about 30 ns [7].…”