1030 nm Kilowatt-Level Ytterbium-Doped Narrow Linewidth Fiber Amplifier

Yinhong, 孙殷宏 Sun; Weiwei, 柯伟伟 Ke; Yujun, 冯昱骏 Feng; Yanshan, 王岩山 Wang; Wanjing, 彭万敬 Peng; Yi, 马毅 Ma; Tenglong, 李腾龙 Li; Xiaojun, 王小军 Wang; Chun, 唐淳 Tang; Kai, 张凯 Zhang

doi:10.3788/cjl201643.0601003

Cited by 2 publications

(2 citation statements)

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“…The length of the gain fiber was optimized to suppress ASE. Also in the same year, Sun et al reported a 1030 nm fiber amplifier employing master oscillator power amplifier (MOPA) structure [10]. A maximum output power of 1.01 kW with an optical-to-optical (O-O) efficiency of 81% was achieved.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

“…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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3 kW high OSNR 1030 nm single-mode monolithic fiber amplifier with a 180 pm linewidth

et al. 2020

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In this Letter, the amplified spontaneous emission (ASE) effect of a 1030 nm fiber laser is studied theoretically and, based on the theoretical results, a 3 kW high optical signal-to-noise ratio (OSNR) 1030 nm fiber amplifier with a 180 pm linewidth and near-diffraction-limited beam quality is achieved. A theoretical model, which takes simulate ASE light falling in the range of Raman light as the Raman seed, has been used to optimize the power scaling capability of 1030 nm fiber amplifiers. It shows that the SRS effect seeded by the ASE is the main limiting factor for the fiber amplifiers operating at 1030 nm, and > 3 k W output power with a high OSNR can be achieved by proper parameter designing of the fiber laser system. A 1030 nm monolithic narrow linewidth fiber amplifier, which delivers 3 kW output power with the OSNR being 37 dB and a 0.18 nm spectrum linewidth, has been demonstrated. At the maximum 3 kW output power, the SRS light peak is obviously higher than ASE light, which agrees with the theoretical predictions. Neither a stimulated Brillouin scattering effect nor a thermal-induced mode instability effect has been observed at ultimate power level, and the beam quality factor M 2 is measured to be less than 1.2. To the best of our knowledge, this is the highest average power for a narrow linewidth single-channel fiber laser system reported so far operating at 1030 nm.

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1030 nm Kilowatt-Level Ytterbium-Doped Narrow Linewidth Fiber Amplifier

Cited by 2 publications

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

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

3 kW high OSNR 1030 nm single-mode monolithic fiber amplifier with a 180 pm linewidth

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