High power broadband continuum source based on an all-PM-fiber master oscillator nonlinear power amplifier

C. L. Chang, Y. Y. Lin, P. Y. Lai, Y. Y. Li, S. H. Chen, S. L. Huang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


In an all-polarization-maintaining-fiber master oscillator power amplifier system at 1064 nm under all normal dispersion, intense nanosecond emission was generated with spectral broadening from 980 to 1600 nm. In such a fiber nonlinear power amplifier, efficient power scaling is able to be free from significant depletion because both laser amplification and nonlinear conversion are simultaneously employed. As a result, output peak power up to 117 kW with a pulse energy of 1.2 mJ is generated with a maximum core intensity of 30 GW cm-2. In addition, the conversion efficiency is 66% for a pulse duration of 6.1 ns at the moderate repetition of 20 kHz. The output level is close to the damage threshold for long-term operation. The onset and interplay of constituted fiber nonlinearities can be addressed, especially from single mode to a few modes, stage by stage. Furthermore, the seeding influence on the spectral broadening reveals its versatility for enabling many potential applications. For seeding by a highly controlled diode laser at the nanojoule level, a double-pass preamplifier significantly improves the energy extraction, resulting in a high input level for an efficient nonlinear power amplifier. Such a linearly polarized light source composed of an intense 1064 nm pump and a broad sideband seed is beneficial for efficiently driving broadband tunable optical parametric amplification.

Original languageEnglish
Article number045101
JournalLaser Physics
Issue number4
StatePublished - Apr 2014


  • fiber laser amplifiers
  • fiber nonlinear optics
  • rare-earth-doped fibers


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