Highly polarized all-fiber thulium laser with femtosecond-laser-written fiber Bragg gratings

Willis, Christina C. C.; McKee, Erik; Böswetter, Pascal; Sincore, Alex; Thomas, Jens; Voigtländer, Christian; Krämer, Ria G.; Bradford, Joshua; Shah, Lawrence; Nolte, Stefan; Tünnermann, Andreas; Richardson, Martin

doi:10.1364/oe.21.010467

Cited by 13 publications

(6 citation statements)

References 24 publications

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“…Being named "eye-safe" lasers, TDFL shave found wide applications in remote sensing, LIDAR, industrial machining, frequency conversion, and biomedicine [1][2][3]. However, some applications require high peak power and high pulse energy 2 μm laser beams, which cannot be steadily obtained from TDFLs, owing to the lack of high-power modulation elements in this wavelength region.…”

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confidence: 99%

High-power passively Q-switched thulium fiber laser with distributed stimulated Brillouin scattering

Tang

Wang

2013

Opt. Lett.

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We report a novel passively Q-switched 2 μm Tm(3+) fiber laser simply by distributed stimulated Brillouin scattering with an all-fiber configuration. The maximum output power is 2.49 W with an optical-to-optical slope efficiency of 12%, and the laser wavelength is centered at ~1991 nm with a spectral width of >10 nm. The single pulse energy can be over 50 μJ with a pulse width of about 20 ns, and the pulse repetition rate can be tuned from several kilohertz to tens of kilohertz by changing the pump power. To the best of our knowledge, this is the highest-average-power passively Q-switched 2 μm Tm(3+) fiber laser in the nanosecond regime.

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confidence: 99%

High-power passively Q-switched thulium fiber laser with distributed stimulated Brillouin scattering

Tang

Wang

2013

Opt. Lett.

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“…However, the power scaling of this type of laser is not that straightforward, and depends on the exact match of the corresponding reflection peaks of the FBG pair. As the pump power increases, thermal effects could influence the reflection spectrum of the FBG and thus change the performance of the laser [23][24][25]. Since the distributions of pump power and signal power are not uniform, the temperature rise at the high reflectivity (HR) FBG and low reflectivity (LR) FBG is different, which would lead to the mismatch of LP 11 mode reflection peaks, destroying Laser Physics Letters High power narrow linewidth LP 11 mode fiber laser using mode-selective FBGs the LP 11 mode operation.…”

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confidence: 99%

High power narrow linewidth LP₁₁ mode fiber laser using mode-selective FBGs

Song¹,

Xu²,

Wu³

et al. 2018

Laser Phys. Lett.

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We demonstrated a high power Yb-doped fiber laser capable of delivering LP11 mode laser output. The oscillation of LP11 mode was realized by incorporating a pair of few-mode fiber Bragg gratings (FBGs), whose LP11 mode reflection peaks are matched with each other. The temperature-sensitivity of the FBGs was used to optimize the matching degree of the LP11 mode reflection peaks. Based on this configuration, over 50 W of LP11 mode output power with a linewidth of around 70 pm was obtained, which, to the best of our knowledge, is the highest power obtained in LP11 mode all-fiber lasers. Moreover, this laser possesses a certain stability; the standard deviation of whose output power is ~0.07% over a period of 300 s stability test. This work could provide a stable and high power LP11 transverse mode laser source for a wide range of applications.

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“…Employing this scheme, output power from several tens of watts [15] to kilowatt level has been demonstrated. In 2014, Belke et al announced a 1 kW single-transverse-mode linearly polarized all-fiber oscillator, which was the highest linearly polarized output power reported to date [16].…”

Section: Introductionmentioning

confidence: 99%

15 kW ytterbium-doped single-transverse-mode, linearly polarized monolithic fiber master oscillator power amplifier

Huang

Tao

et al. 2015

Appl. Opt.

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A linearly polarized monolithic fiber laser based on a master oscillator power amplifier structure with a master oscillator and a one-stage power amplifier is reported. We design a homemade oscillator based on the theory that, in the coiled gain fiber, the higher modes and the polarized mode of the fundamental mode along the fast axis are suppressed effectively because of their obviously higher bend loss than that of the polarized mode of the fundamental mode along the slow axis. The oscillator operates at 1080 nm, launching a 30 W seed laser with a high polarization extinction ratio of 19 dB into the power amplifier via a mode field adapter. The power amplifier utilizes Yb-doped polarization-maintaining fiber of 20/400 μm, which produces nearly diffraction-limited output power of about 1.5 kW with an optical-optical efficiency of 81.5% and a polarization extinction ratio of 13.8 dB. Both the M(x)² factor and the M(y)² factor of the collimated beam are measured to be about 1.2. The spectral width of the output power is broadened approximately linearly, and the full width at half maximum of the spectrum at the maximum output power is about 5.8 nm. It is known as the highest linearly polarized output power to the best of our knowledge.

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Highly polarized all-fiber thulium laser with femtosecond-laser-written fiber Bragg gratings

Cited by 13 publications

References 24 publications

High-power passively Q-switched thulium fiber laser with distributed stimulated Brillouin scattering

High-power passively Q-switched thulium fiber laser with distributed stimulated Brillouin scattering

High power narrow linewidth LP₁₁ mode fiber laser using mode-selective FBGs

15 kW ytterbium-doped single-transverse-mode, linearly polarized monolithic fiber master oscillator power amplifier

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Highly polarized all-fiber thulium laser with femtosecond-laser-written fiber Bragg gratings

Cited by 13 publications

References 24 publications

High-power passively Q-switched thulium fiber laser with distributed stimulated Brillouin scattering

High-power passively Q-switched thulium fiber laser with distributed stimulated Brillouin scattering

High power narrow linewidth LP11 mode fiber laser using mode-selective FBGs

15 kW ytterbium-doped single-transverse-mode, linearly polarized monolithic fiber master oscillator power amplifier

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Product

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High power narrow linewidth LP₁₁ mode fiber laser using mode-selective FBGs