210 W single-frequency, single-polarization, thulium-doped all-fiber MOPA

Liu, Jiang; Shi, Hongxing; Liu, Kun; Hou, Yudong; Wang, Pu

doi:10.1364/oe.22.013572

Cited by 55 publications

(21 citation statements)

References 21 publications

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“…In this case, M 2 should be less than 2. Due to the quasi-three level nature of the laser, cooling the thulium-doped fiber to the lower temperature was very critical for achieving high slope efficiency in the power amplifier [6]. The pulse duration of the fiber power amplifier are shown in Fig.…”

Section: Picosecond-pulsed 1204 W Tm-fiber Mopamentioning

confidence: 99%

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Recent progress in high-power ultrafast thulium-doped fiber lasers and mid-infrared supercontinuum sources

et al. 2015

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The research on high-power ultrafast thulium-doped fiber lasers at 2 µm wavelength and mid-infrared (mid-IR) supercontinuum sources at 2~5 µm wavelength is one of these hot spots because of their potential applications in eye-safe radar, material processing, and electro-optical countermeasure system, which has an irreplaceable role compared to other wavelength fiber lasers. Here, we review the recent work of our group at 2 µm high-power ultrafast thulium-doped fiber lasers and 2~5 µm high-power mid-IR supercontinuum sources. Firstly, we demonstrate a high-power picosecond-pulsed thulium-doped all-fiber master-oscillator power-amplifier (MOPA), which yielded 120 W of average output power at central wavelength of 1963 nm with pulse duration of 16 ps.And then, we demonstrate a 203 W average power all-polarization-maintaining (all-PM) thulium-doped fiber MOPA system delivering picosecond pulses without using conventional chirped pulse amplication (CPA) technique. The pulse duration of 15 ps at 611.5 MHz repetition-rate results in a peak-power of 22 kW in the final PM thulium-doped fiber power amplifier. The polarization extinction ratio (PER) at the highest average output power was measured to be >15 dB, further power scaling is limited by available pump power. Finally, we demonstrate a high-power mid-IR supercontinuum generation with up to 21.8 W average power and spectrum spanning from 1.9 to beyond 3.8 µm in a single-mode ZBLAN fiber pumped by a 2 µm amplified picosecond pulses from a single-mode thulium-doped all-fiber MOPA.

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Section: Picosecond-pulsed 1204 W Tm-fiber Mopamentioning

confidence: 99%

“…The high-power all-PM thulium-doped all-fiber picosecond MOPA system consists of a PM thulium-doped fiber picosecond oscillator and three-stage PM thulium-doped fiber amplifiers [6]. The schematic setup of the MOPA system is shown in Fig.…”

Section: Linearly-polarized Picosecond-pulsed 203 W Tm-fiber Mopamentioning

confidence: 99%

Recent progress in high-power ultrafast thulium-doped fiber lasers and mid-infrared supercontinuum sources

et al. 2015

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“…However, the direct output power of these lasers is relatively low. By using a master-oscillator poweramplifier (MOPA) scheme, the output power can be increased [7][8] , with the drawback that the amplified spontaneous emission (ASE) noise maybe degrade the OSNR and broaden the laser linewidth. In addition, achieving a high output power is hindered by backward stimulated Brillouin scattering (SBS).…”

Section: Introductionmentioning

confidence: 99%

High power, high signal-to-noise ratio single-frequency 1μm Brillouin all-fiber laser

et al. 2016

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We demonstrate a high-power, high signal-to-noise ratio single-frequency 1 μm Brillouin all-fiber laser with high slope efficiency. The Brillouin laser system consists of a high-power single-frequency fiber laser and a single-pass Brillouin ring cavity. The high-power single-frequency fiber laser is one-stage master-oscillator power amplifier with the maximum output power of 10.33 W, the signal-to-noise ratio of 50 dB and the slope efficiency of 46%. The Brillouin fiber laser is pumped by the amplified laser with a linewidth of 33 kHz and an output power of 2.61 W limited by the damage threshold of the optical isolator. By optimizing the length of the Brillouin ring cavity to 10 m, stable singlefrequency Brillouin fiber laser is obtained with 3 kHz linewidth owing to the linewidth narrowing effect. At the launched pump power of 2.15 W, the Brillouin fiber laser generates maximum output power of 1.4 W with a slope efficiency of 79% and the optical signal-to-noise ratio of 77 dB.

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“…Average powers as high as 1 kW have been demonstrated in Thulium fiber lasers [1] along with highpower narrow-linewidth output [2][3][4][5][6], wavelength tunability [3,7,8], and all-fiber architecture [1,[4][5][6]. Additionally, there have been recent advances in high-power Holmium doped fiber lasers [9,10] as well as several notable improvements in pulsed Tm:fiber laser performance in nanosecond [11][12][13], picosecond [14,15], and femtosecond [16][17][18][19] regimes for use in a wide range of applications such as pumps for mid-IR generation, LIDAR, materials processing, and telecommunications.…”

Section: Introductionmentioning

confidence: 99%

High-power spectral beam combining of linearly polarized Tm:fiber lasers

et al. 2015

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To date, high-power scaling of Tm:fiber lasers has been accomplished by maximizing the power from a single fiber aperture. In this work, we investigate power scaling by spectral beam combination of three linearly polarized Tm:fiber MOPA lasers using dielectric mirrors with a steep transition from highly reflective to highly transmissive that enable a minimum wavelength separation of 6 nm between individual laser channels within the wavelength range from 2030 to 2050 nm. Maximum output power is 253 W with M(2)<2, ultimately limited by thermal lensing in the beam combining elements.

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210 W single-frequency, single-polarization, thulium-doped all-fiber MOPA

Cited by 55 publications

References 21 publications

Recent progress in high-power ultrafast thulium-doped fiber lasers and mid-infrared supercontinuum sources

Recent progress in high-power ultrafast thulium-doped fiber lasers and mid-infrared supercontinuum sources

High power, high signal-to-noise ratio single-frequency 1μm Brillouin all-fiber laser

High-power spectral beam combining of linearly polarized Tm:fiber lasers

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