Ultrafast soliton mode-locked fiber laser at 1560 nmbased on Znq2 as a saturable absorber
2021
A mode-locked fiber laser was developed by using
bis(8-hydroxyquinoline) zinc (Znq2) as a
saturable absorber (SA). Znq2 is an
organic metal chelate with several advantages such as good saturable
absorption, relatively high damage threshold, and an easy, low-cost, and
simple fabrication process. The developed SA based on
Znq2 has a linear absorption (at 1560 nm),
modulation depth, and saturation intensity of 1.2 dB, 16.6 %, and
95MW/cm2, respectively. The laser
cavity produced a very stable soliton mode-locking operation at 1560.6 nm
with pulse duration, repetition rate, and SNR of 1.46 ps, 3.5 MHz, and
60.6 dB, respectively. This work is the first, to the best of our
knowledge, to report Znq2 as a mode
locker.
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