Single mode MOPA structured all-fiber Yb pulse fiber amplifier at low repetition |
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| Authors: | Zheng C Zhang H T Cheng W Y Liu M Yan P Gong M L |
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| Institution: | 1.State Key Laboratory of Tribology, Center for Photonics and Electronics, Department of Precision Instruments, Tsinghua University, Beijing, 100084, China
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| Abstract: | We describe a mopa structured all-fiber 15 μm fiber amplifier cascade. A single-mode diode laser generating 1064 nm wavelength,
several nanosecond pulses at 100 Hz repetition was adopted to seed a corepumping amplifier featuring a 6 μm core Yb-doped
fiber. Multi-stage pulse-pumping technology was applied to eliminate ASE as much as possible and ease the heat load of the
system that leads to the freedom of temperature control of the laser diode. The master oscillator-power amplifier (MOPA) generated
1064 nm, 18 ns pulse-width, 100 Hz repetition of 220 μJ single pulse energy, peak power >12 kW with single transverse output.
The pulse energy of 220 μJ is the largest to date in the all-fiber MOPA amplifier with core diameter around 15 μm to our knowledge. |
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