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October 1, 2025PhotonicsOpen Access

7 kW LD-Pumped Nearly-Single-Mode MOPA Fiber Laser Enabled by Low-NA Confined-Doped Fiber

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Authors

HTHengyu TangSwissLitho (Switzerland)BRB. Gowri Sankara RaoYGYufei Gan

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Overview

Experimental results demonstrate improved TMI thresholds in lasers with lower NA, indicating enhanced power scalability.

Key Points

  • 6.79 kW MOPA fiber laser achieves nearly-single-mode quality using low-NA confined-doped fiber.
  • Higher TMI thresholds observed in fibers with descending NA, supporting better laser performance.
  • Three types of YDFs were manufactured, with doping ratios around 80% and varying NAs.
  • Study enhances understanding of YDF designs for mitigating instability in high-power lasers.

Cite This Study

Tang et al. (2025) studied this question.

synapsesocial.com/papers/68dd91d5fe798ba2fc498eddhttps://doi.org/10.3390/photonics12100971
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