Widely-tunable all-fiber Tm doped MOPA with &gt; 1 kW of output power

ren, chuanyong; Shen, Yuzhong; Zheng, Yuhao; Mao, Yan; Wang, Fei; Shen, Deyuan; Zhu, Heyuan

doi:10.1364/oe.494015

Cited by 25 publications

(3 citation statements)

References 27 publications

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“…The experimental results of different output levels such as two-hundred watts (Case I [22]), five-hundred watts (Case II [23]) and one kilowatt (Case III [24]) in published papers were compared to the simulation results of beam quality prediction. The active fiber used in the studies was a thulium-doped large-mode-area (LMA) fiber with a core diameter of 25 μm (NA = 0.1) and a cladding diameter of 400 μm (NA = 0.46).…”

Section: Comparison and Discussionmentioning

confidence: 99%

Beam quality prediction for Tm-doped fiber system based on finite-difference beam propagation method

Wang,

Tao,

Yang

et al. 2024

Phys. Scr.

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A numerical model is established to predict the beam quality factor M2 of fiber laser for the first time. The finite-difference beam propagation method (FD-BPM) is introduced to simulate the beam propagation of thulium-doped fiber lasers (TDFLs) with given design parameters. The output beam profile can be calculated for an active fiber with complex refractive index profiles and various bending radii. The beam quality factor M2 can be obtained by the calculated beam profile. The numerical simulation results agree with the reported experiment data with a deviation of less than 10 %, which validates the accuracy of the model. This model provides a convenient and efficient approach for designing the high-beam-quality TDFLs with reduced experiment efforts.

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Section: Comparison and Discussionmentioning

confidence: 99%

Beam quality prediction for Tm-doped fiber system based on finite-difference beam propagation method

Wang,

Tao,

Yang

et al. 2024

Phys. Scr.

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“…The output power ~1.2 kW at ~2000 nm was obtained with these lasers in 2018. Their power evolution is presented in Figure 5 [62][63][64][65][66][67][68][69][70][71].…”

Section: Power Evolution Of Re-doped Fiber Lasersmentioning

confidence: 99%

Brief Review of Recent Developments in Fiber Lasers

Nemova

2024

Applied Sciences

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This review covers the recent achievements in high-power rare earth (RE)-doped fiber lasers, Raman fiber lasers, and Brillouin fiber lasers. RE-doped fiber lasers have many applications such as laser cutting, laser welding, laser cleaning, and laser precision processing. They operate in several wavelength ranges including 1050–1120 nm (ytterbium-doped fiber lasers), 1530–1590 nm (erbium- and erbium–ytterbium-doped fiber lasers), and 1900–2100 nm (thulium- and holmium-doped fiber lasers). White spaces in the wavelength spectrum, where no RE-doped fiber lasers are available, can be covered by Raman lasers. The heat power generated inside the laser active medium due to the quantum defect degrades the performance of the laser causing, for example, transverse-mode instability and thermal lensing. It can even cause catastrophic fiber damage. Different approaches permitting the mitigation of the heat generation process are considered in this review. Brillouin fiber lasers, especially multiwavelength Brillouin fiber lasers, have several important applications including optical communication, microwave generation, and temperature sensing. Recent progress in Brillouin fiber lasers is considered in this review.

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“…In these systems, the maximum output power reported in the literature was 567 W at 1.97 µm, achieved by Walbaum et al in 2016 [13]. Master-Oscillator Power Amplifier (MOPA) systems that are composed of a first low-power signal source (single-oscillator laser source or 2 µm diode) and one or more amplification stages were also studied in the literature (black dots in Figure 2) [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. The highest output power generated in a monolithic MOPA source so far is 1100 W at 1.95 µm reported in 2021 [26].…”

Section: Introductionmentioning

confidence: 99%

Emission Wavelength Limits of a Continuous-Wave Thulium-Doped Fiber Laser Source Operating at 1.94 µm, 2.09 µm or 2.12 µm

Louot,

Sanson,

Motard

et al. 2024

Photonics

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We present a thulium-doped single-oscillator monolithic fiber laser emitting successively at three wavelengths, especially at unusual long wavelengths as 2.09 µm and even at 2.12 µm. The 793 nm core absorption of 8.42 dB/m allows for achieving a slope efficiency higher than 43% both at 1.94 µm and 2.09 µm. The operation of the laser at 1.94 µm, 2.09 µm, and 2.12 µm is compared by using different fiber Bragg gratings to push the limit of thulium ions emission above 2.05 µm. This is the first demonstration of emission exceeding wavelengths of 2.1 µm of an only thulium-doped fiber laser, to the best of our knowledge.

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Widely-tunable all-fiber Tm doped MOPA with > 1 kW of output power

Cited by 25 publications

References 27 publications

Beam quality prediction for Tm-doped fiber system based on finite-difference beam propagation method

Beam quality prediction for Tm-doped fiber system based on finite-difference beam propagation method

Brief Review of Recent Developments in Fiber Lasers

Emission Wavelength Limits of a Continuous-Wave Thulium-Doped Fiber Laser Source Operating at 1.94 µm, 2.09 µm or 2.12 µm

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