Presentation + Paper
5 March 2021 Single-mode Er/Yb fiber MOPA at 1562nm with 302W power and 56% optical efficiency
Turghun Matniyaz, Fanting Kong, Monica T. Kalichevsky-Dong, Liang Dong
Author Affiliations +
Abstract
We have demonstrated a new record of 302W single-mode power from an Er/Yb co-doped fiber master oscillator power amplifier (MOPA) with a record optical efficiency of 56%. This single-mode power is a new record for any lasers in this wavelength range. The previous record of single-mode power from an Er/Yb fiber laser pumped by a 9xx nm diode was 207 W at 1560 nm. The new optical efficiency of 56%, very close to the quantum-limited efficiency of 58.6%, is also a new record for Er/Yb fiber lasers. This new result is made possible mainly due to new fiber development from Nufern and off-resonant pumping of the Er/Yb fiber, which demonstrates further power-scaling potentials of Er/Yb fiber lasers pumped by widely available 9xx nm diodes. We also show that further power scaling is no longer limited by Yb3+ parasitic lasing near 1.06μm, but by fiber fuse in the Er/Yb fiber. The Yb3+ amplified spontaneous emission (ASE) was found to be negligible in all the cases we tested. Nonetheless, our numerical investigation shows that off-resonance pumping at 915 nm or 940 nm only plays a small role in the above-mentioned negligible ASE. We believe that the major cause may be the high Er3+ doping level in the Nufern Er/Yb co-doped fiber. Our results provide significant new insights and will stimulate further power scaling of Er/Yb fiber lasers and amplifiers.
Conference Presentation
© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Turghun Matniyaz, Fanting Kong, Monica T. Kalichevsky-Dong, and Liang Dong "Single-mode Er/Yb fiber MOPA at 1562nm with 302W power and 56% optical efficiency", Proc. SPIE 11665, Fiber Lasers XVIII: Technology and Systems, 116650M (5 March 2021); https://doi.org/10.1117/12.2573781
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KEYWORDS
Fiber lasers

Diodes

Ytterbium

Doping

Erbium

Fiber amplifiers

Optical amplifiers

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