Abstract
An elliptical initial polarization state is essential for generating
mode-locked pulses using the nonlinear polarization rotation technique. In
this work, the relationship between the ellipticity ranges capable of
maintaining mode-locked operation against different pump power levels is
investigated. An increasing pump power, in conjunction with minor adjustments
to the polarization controller’s quarter waveplate, results in a wider
ellipticity range that can accommodate mode-locked operation. Other parameters
such as noise, pulsewidth, and average output power are also observed to vary
as the ellipticity changes.
© 2017 Chinese Laser Press
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