302  W single-mode power from an Er/Yb fiber MOPA

Matniyaz, Turghun; Kong, Fanting; Kalichevsky-Dong, Monica T.; Dong, Liang

doi:10.1364/ol.392786

Cited by 37 publications

(22 citation statements)

References 18 publications

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“…To increase the output power further, doping the Yb 3+ ions can effectively improve the pump absorption coefficient [1,9]. Additionally, doping high-concentration phosphorus is also necessary for Er 3+ /Yb 3+ codoped silica fiber (EYDF) [10,11]. This has two advantages, namely, an improved dispersion effect of the Er 3+ and Yb 3+ ions [12], and a weak back energy transfer (ET) from the Er 3+ to Yb 3+ ions in the high phonon energy environment [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…The current power record of the single-mode EYDF is 302 W, which has an optical efficiency of 56%. The gain fiber (Nufern-LMA-EYDF-25P/300-HE) was doped with ~11mol% P 2 O 5 [10]. At present, two primary factors limit the increase in power of the EYDF: first, the significant thermal effect caused by the quantum defect (QD) [10,15,16], which reduces the pump absorption and damages the fiber coating [17][18][19]; second, the amplified spontaneous emission (ASE) and parasitic oscillations of the Yb 3+ ions at ~1 µm, reducing the efficiency of the ET from the Yb 3+ to the Er 3+ ions [11].…”

Section: Introductionmentioning

confidence: 99%

“…The absorption coefficients of the EYDF at ~915, ~940, ~97x, and ~1018 nm are significantly different, and are affected by the composition of the fiber core glass. The low pump absorption can achieve a smoother population inversion distribution along the EYDF [20], thereby suppressing the significant thermal effect and leading to a Yb-ASE gain [6,10,21,22]. For the high phosphorus-doped EYDF, the absorption spectrum at 940 nm is flatter than 915 nm and 97x nm [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have been conducted on the doping concentration and doping ratio of the Yb 3+ and Er 3+ ions in silica glass [24]. The results show that when the doping concentration of the Yb 3+ ions reaches 3-5 wt%, and the molar concentration ratio of Yb 3+ /Er 3+ ions is 8-15, the EYDF exhibits a better laser performance [10,[24][25][26]. However, the strong pump absorption of the Yb 3+ ions inevitably causes the temperature of the glass to rise.…”

Section: Introductionmentioning

confidence: 99%

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Temperature Dependence of Absorption and Energy Transfer Efficiency of Er3+/Yb3+/P5+ Co-Doped Silica Fiber Core Glasses

et al. 2022

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A high phosphorus Er3+/Yb3+ co-doped silica (EYPS) fiber core glass was prepared using the sol-gel method combined with high-temperature sintering. The absorption spectra, emission spectra, and fluorescence decay curves were measured and compared in temperatures ranging from 300 to 480 K. Compared to 915 and 97x nm, the absorption cross-section at ~940 nm (~0.173 pm2) demonstrates a weaker temperature dependence. Hence, the 940 nm pump mechanism is favorable for achieving a high-power laser output at 1.5 μm. Additionally, the double-exponential fluorescence decay of Yb3+ ions and the emission intensity ratio of I1018nm/I1534nm were measured to evaluate the energy transfer efficiency from Yb3+ ions to Er3+ ions. Through the external heating and active quantum defect heating methods, the emission intensity ratios of I1018nm/I1534nm increase by 30.6% and 709.1%, respectively, from ~300 to ~480 K. The results indicate that the temperature rises significantly reduce the efficiency of the energy transfer from the Yb3+ to the Er3+ ions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temperature Dependence of Absorption and Energy Transfer Efficiency of Er3+/Yb3+/P5+ Co-Doped Silica Fiber Core Glasses

et al. 2022

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“…Fig 6. The power evolutions of (a) 1086.5 nm signal and (b) the residual pump as functions of pump power, with different QD output.…”

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confidence: 99%

Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber

et al. 2022

High Pow Laser Sci Eng

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Quantum defect (QD) is an important issue that demands prompt attention in high-power fiber laser. Large QD may aggravate the thermal load in the laser, which would impact the frequency and amplitude noise, mode stability and threaten the security of high-power laser system. Here, we propose and demonstrate a cladding-pumped Raman fiber laser (RFL) with QD <1%. Using the Raman gain of the boson peak in a phosphorusdoped fiber to enable the cladding pump, the QD is reduced to as low as 0.78% with a 23.7 W output power. To our knowledge, this is the lowest QD ever reported in claddingpumped RFL. Furthermore, the output power can be scaled to 47.7 W with a QD of 1.29%. This work not only offers a preliminary platform for the realization of high-power low-QD fiber laser, but also proves low-QD fiber laser's great potential in power scaling.

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Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

et al. 2022

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The success of high-power fiber lasers is fueled by maturation of active and passive fibers, combined with the availability of high-power fiber-based components. In this contribution, we first overview the enormous potential of rare-earth doped fibers in spectral coverage and recent developments of key fiber-based components employed in high-power laser systems. Subsequently, the emerging functional active and passive fibers in recent years, which exhibit tremendous advantages in balancing or mitigating parasitic nonlinearities hindering high-power transmission, are outlined from the perspectives of geometric and material engineering. Finally, novel functional applications of conventional fiber-based components for nonlinear suppression or spatial mode selection, and correspondingly, the high-power progress of function fiber-based components in power handling are introduced, which suggest more flexible controllability on high-power laser operations. Graphical abstract

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302 W single-mode power from an Er/Yb fiber MOPA

Cited by 37 publications

References 18 publications

Temperature Dependence of Absorption and Energy Transfer Efficiency of Er3+/Yb3+/P5+ Co-Doped Silica Fiber Core Glasses

Temperature Dependence of Absorption and Energy Transfer Efficiency of Er3+/Yb3+/P5+ Co-Doped Silica Fiber Core Glasses

Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

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