>5kW Record High Power Narrow Linewidth Laser From Traditional Step-Index Monolithic Fiber Amplifier
- 13 September 2021
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 33 (21), 1181-1184
- https://doi.org/10.1109/lpt.2021.3112270
Abstract
A high-power monolithic continuous wave (CW) Yb doped fiber amplifier at 1064 nm has been demonstrated based on traditional large mode area step-index fiber, which generated 5.07 kW narrow line-width laser with near diffraction-limited beam quality. At the maximal output power, >35dB OSNR has been achieved with line-width being 370pm, and the measured beam quality is M 2 x = 1.252, M 2 y = 1.322. The influence of cooling temperature on SRS has been investigated in high power fiber lasers, which shows that the SRS at 4kW has been suppressed 24 dB by lowering the temperature from 20°C to 8°C. To the best of our knowledge, this is the highest narrow line-width laser power generated from the traditional large mode area step-index monolithic fiber amplifier.Keywords
Funding Information
- National Key Research and Development Program of China (2017YFB1104401)
This publication has 22 references indexed in Scilit:
- 108 kW spectral beam combination of eight all-fiber superfluorescent sources and their dispersion compensationOptics Express, 2016
- Simplified modelling the mode instability threshold of high power fiber amplifiers in the presence of photodarkeningOptics Express, 2015
- Study of Wavelength Dependence of Mode Instability Based on a Semi-Analytical ModelIEEE Journal of Quantum Electronics, 2015
- Mitigating of modal instabilities in linearly-polarized fiber amplifiers by shifting pump wavelengthJournal of Optics, 2015
- Optimization of phase modulation with arbitrary waveform generators for optical spectral control and suppression of stimulated Brillouin scatteringOptics Express, 2015
- Influence of signal bandwidth on mode instability thresholds of fiber amplifiersPublished by SPIE-Intl Soc Optical Eng ,2015
- Impact of gain saturation on the mode instability threshold in high-power fiber amplifiersOptics Express, 2014
- Overview of a Steady-Periodic Model of Modal Instability in Fiber AmplifiersIEEE Journal of Selected Topics in Quantum Electronics, 2014
- High-power fibre lasersNature Photonics, 2013
- Spontaneous Raman scattering in optical fibers with modulated probe light for distributed temperature Raman remote sensingJournal of Lightwave Technology, 1999