All-fiber graphene passively q-switched nanosecond thulium doped fiber laser at 1900 nm
We successfully demonstrated a simple, compact and low cost passive Q-switched Thulium doped fiber laser (TDFL) at long wavelength of 1854.3 nm regions in conjunction with 1552 nm pump excitation. A stable pulse has been generated using graphene film based saturable absorber (SA). The graphene...
| Main Authors: | , , , , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/41909/ http://irep.iium.edu.my/41909/ http://irep.iium.edu.my/41909/1/A_Q-switched_thulium-doped_fiber_laser_with_a_graphene_thin_film_based_saturable_absorber.pdf |
| Summary: | We successfully demonstrated a simple, compact
and low cost passive Q-switched Thulium doped fiber laser
(TDFL) at long wavelength of 1854.3 nm regions in conjunction
with 1552 nm pump excitation. A stable pulse has been generated
using graphene film based saturable absorber (SA). The
graphene is synthesized by electrochemical exfoliation of graphite
at room temperature in 1% sodium dodecyl sulphate (SDS)
aqueous solution. Graphene flakes obtained from the process are
mixed with polyethylene oxide (PEO) as the host polymer to
produce free standing composite thin film which acts as a passive
Q-switcher in the TDFL ring cavity. The SA is fabricated by
sandwiching the graphene thin film between two fiber
connectors. At 1552 nm pump power of 498 mW, a stable pulse
train has been observed with a repetition rate of 6.51 kHz and
pulse duration of 11.51 µs. The high performances of Q-switched
laser suggest that the new type of saturable absorber based on
electrochemical exfoliation in conjunction with all-fiber ring
cavity configuration is suitable for a Q-switcher near 1900 nm
wavelength. |
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