A high power 1030 nm ytterbium doped fiber laser with a near diffraction limited quality using a 20/400 μm active fiber

Jafari, Niloofar; Batebi, S.; Sarikhani, S.; Chenar, Reza Eyni

doi:10.1088/1555-6611/ac687c

Cited by 2 publications

(3 citation statements)

References 21 publications

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“…Suppression of ASE is crucial for successful power scaling. In short-wavelength fiber lasers, reducing the total absorption of the gain fiber can be used to suppress ASE [14][15][16][17][18][19]. In our experiment, a fiber laser amplifier with a pump-sharing structure is employed, where the initial seeding laser power is set at 151 W. The length of the germanium-doped fiber (GDF) is defined as the distance from the combiner tail to QBH, and it initially measures 4 m in length.…”

Section: Optimizing Ydf Length To Mitigate the Ase Effectmentioning

confidence: 99%

“…Moreover, the amplification of short-wavelength fiber lasers is also seriously affected by stimulated Raman scattering (SRS). In recent years, there have been a variety of research studies conducted on high-power fiber lasers at a short-wavelength range [14][15][16][17][18][19]. Naderi et al achieved excellent ASE suppression with 40 dB at the power level of 1 kW at 1030 nm, using a preamplifier bandpass filter and optimizing the YDF length in the amplifier stage [16].…”

Section: Introductionmentioning

confidence: 99%

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A 4.8-kW high-efficiency 1050-nm monolithic fiber laser amplifier employing a pump-sharing structure

Meng,

Li,

Yang

et al. 2023

Front. Phys.

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The power scaling of ytterbium-doped fiber (YDF) lasers emitting at the wavelength range of 1030 nm–1060 nm has been limited by amplified spontaneous emission (ASE), stimulated Raman scattering (SRS) effect, and transverse mode instability (TMI). These effects pose challenges in achieving a high-output power laser within the range of 1030 nm–1060 nm while maintaining a high signal-to-noise ratio. Based on a counter-pumped fiber laser amplifier utilizing our self-developed ytterbium-doped fiber, we have successfully showcased a 4.8-kW laser output at 1050 nm, accompanied by an 85.3% slope efficiency and nearly diffraction-limited beam quality. By effectively applying ASE and TMI, and controlling the Raman Stokes at ∼17 dB below the primary signal wavelength, we have achieved optimal performance at the maximum power level. This high efficiency has been attained through a pump-sharing structure combined with cost-effective, non-wavelength-stabilized 976-nm laser diodes.

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Section: Optimizing Ydf Length To Mitigate the Ase Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 4.8-kW high-efficiency 1050-nm monolithic fiber laser amplifier employing a pump-sharing structure

Meng,

Li,

Yang

et al. 2023

Front. Phys.

View full text Add to dashboard Cite

show abstract

“…In recent years, fiber lasers operating at wavelengths below 1060 nm have been reported by multiple research institutions [8][9][10][11][12][13][14][15][16]. In 2016, Naderi et al constructed a narrow linewidth fiber amplifier at 1034 nm with an output power of 1 kW [9].…”

Section: Introductionmentioning

confidence: 99%

A 5 kW Nearly-Single-Mode Monolithic Fiber Laser Emitting at ~1050 nm Employing Asymmetric Bi-Tapered Ytterbium-Doped Fiber

Meng,

Li,

Yang

et al. 2023

Photonics

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Limited by stimulated Raman scattering (SRS), amplified spontaneous emission (ASE) and transverse mode instability (TMI), it is challenging to achieve high-power laser output in ytterbium-doped fiber (YDF) lasers with operating wavelengths less than 1060 nm. In high-power fiber lasers, bi-tapered YDF can provide a balance between the suppression of SRS and TMI. In this work, we designed and fabricated a new double-cladding asymmetric bi-tapered YDF to suppress ASE and SRS in the 1050 nm monolithic fiber laser. The asymmetric bi-tapered YDF has an input end with a core/cladding diameter of ~20/400 μm, a middle section with a core/cladding diameter of ~30/600 μm and an output end with a core/cladding diameter of ~25/500 μm. The working temperature of the non-wavelength-stabilized 976 nm laser diodes was optimized to improve the TMI threshold. An output power of over 5 kW with an efficiency of 83.1% and a beam quality factor M2 of about 1.47 were achieved. To the best of our knowledge, this represents the highest power nearly-single mode in 1050 nm fiber lasers. This work demonstrates the potential of asymmetric bi-tapered YDF for achieving a high-power laser with high beam quality in 1050 nm fiber lasers.

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A high power 1030 nm ytterbium doped fiber laser with a near diffraction limited quality using a 20/400 μm active fiber

Cited by 2 publications

References 21 publications

A 4.8-kW high-efficiency 1050-nm monolithic fiber laser amplifier employing a pump-sharing structure

A 4.8-kW high-efficiency 1050-nm monolithic fiber laser amplifier employing a pump-sharing structure

A 5 kW Nearly-Single-Mode Monolithic Fiber Laser Emitting at ~1050 nm Employing Asymmetric Bi-Tapered Ytterbium-Doped Fiber

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