5kW High peak power, 0.2 mJ high pulse energy, linearly-polarized pulsed laser from a single all-fiber oscillator. (December 2015)

• Record Type: Journal Article
• Authors: Shi, Chen; Huang, Long; Wang, Xiaolin; Zhou, Pu
• Is Part Of: Optics & laser technology. Volume 75(2015)
• Page Start: 24
• Page End: 28
• Publication Date: 2015-12
• Subjects: Fiber laser -- High peak power -- Linearly-polarized; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2015.06.017
• Languages: English
• ISSNs: 0030-3992

Abstract

Abstract: We report a high peak power ytterbium-doped fiber laser that emitted linearly-polarized laser at 1064 nm. An intracavity polarization-maintaining (PM) acousto-optic modulator (AOM) was used as a Q-switch to generate pulsed laser output. The whole system was constructed with all-fiber structure. The power of the polarized laser reached 4.21 W and a polarization purity of greater than 97.6% under the repetition rate of 20 kHz. The pulse width was 37 ns, which implied a 5 kW peak power and 0.2 mJ pulse energy. It is the highest peak power output from a linearly-polarized, Q-switched fiber laser oscillator to the best of our knowledge. Highlights: We constructed a linearly-polarized pulsed all fiber oscillator. We achieved 5 kW peak power and 0.2 mJ pulse energy output. The oscillator has the potential for further power scaling. Intracavity round trip gain was calculated to estimate Raman gain.