Abstract
In this paper, we build a mode-locked all-polarization-maintaining figure-of-8 erbium-doped fiber oscillator based on a nonlinear amplifying loop mirror. The fiber oscillator can generate 1.6ps chirped pulses that can be de-chirped to 500fs at 1550nm with a pulse energy of 0.8nJ and a repetition rate of 12MHz. It can be further amplified up to 10nJ and compressed down to 100fs with a pre-chirp managed nonlinear amplification setup. Such an oscillator and amplifier configuration has the advantages of self-starting and long-term operation, and it is highly suitable for subsequent frequency conversion, which is desirable for many applications in ultrafast microscopy and precision spectroscopy.
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