Abstract
The spectral intensity near 1µm in a supercontinuum (SC) generated from an Er-doped fiber femtosecond optical frequency comb is enhanced effectively by cascading an Yb-doped fiber amplifier after spectral broadening. A 1µm laser output with a dechirped pulse width of 72 fs and a spectral width of 25nm is achieved. Through further power amplification, the output power of 1µm laser can be up to 750mW and the pulse width after compression is 85 fs. The spectral enhancement technology provides an effective optical source for a 1µm optical frequency comb based on an Er-doped fiber femtosecond laser.
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