Optics Express,
Journal Year:
2024,
Volume and Issue:
33(2), P. 2310 - 2310
Published: Dec. 26, 2024
We
propose
and
demonstrate
an
ultra-wide
tunable
mode-locked
all-fiber
laser
based
on
nonlinear
amplifying
loop
mirror
(NALM)
with
the
output
of
cylindrical
vector
beams
(CVBs).
The
tuning
range
covers
from
1029
nm
to
1098
through
intracavity
polarization
evolution
(NPE)
filter
effect.
switchable
CVBs
between
radially
azimuthally
polarized
mode
purity
above
90%
are
generated
by
incorporating
a
broadband
few-mode
long-period
fiber
grating
(LPFG).
It
is
first
time
realize
near
1100
widest
spectral
in
achieved
our
knowledge.
pulsed
at
have
3
dB
bandwidth
0.31
pulse
duration
358ps.The
narrow-bandwidth
less
than
1
obtained
among
whole
process
which
high
flexibility
precision
introducing
what
we
believe
be
novel
mechanisms
NPE
into
NALM
cavity.
wide-range
has
potential
applications
high-capacity
optical
communication,
imaging,
optic
sensing
fields.
APL Photonics,
Journal Year:
2024,
Volume and Issue:
9(3)
Published: March 1, 2024
Mode-locking
techniques
have
played
a
pivotal
role
in
developing
and
advancing
laser
technology.
Stable
fiber-cavity
configurations
can
generate
trains
of
pulses
spanning
from
MHz
to
GHz
speeds,
which
are
fundamental
various
applications
micromachining,
spectroscopy,
communications.
However,
the
generation
exploitation
multiple
timescales
single
cavity
configuration
remain
unexplored.
Our
work
demonstrates
designed
control
pulse
nanosecond
picosecond
with
broadband
output
low
mode-locking
threshold.
approach
exploits
frequency
mechanism
that
simultaneously
drives
modes
an
integrated
microring
resonator
nested
within
external
fiber-loop
cavity,
guaranteeing
ultra-stable
operation.
By
selectively
filtering
modes,
we
transition
burst
components
coexist.
produces
train
durations
5.1
ns
3.1
ps
at
repetition
rates
4.4
48.7
GHz,
time-bandwidth
products
close
transform-limited
values
0.5
0.46,
respectively.
Moreover,
absence
modulation,
demonstrate
comb
spectra
adjustable
central
wavelength.
findings
potential
significantly
contribute
development
cutting-edge
technologies
applications,
harnessing
distinct
advantages
mode-locked
across
scientific
engineering
disciplines.
Optics Express,
Journal Year:
2023,
Volume and Issue:
31(17), P. 27667 - 27667
Published: July 25, 2023
We
characterized
and
analyzed
the
effect
of
intracavity
spectral
filtering
in
Er:fiber
laser
mode-locked
with
a
semiconductor
saturable
absorber
mirror
(SESAM).
studied
dispersive
properties
bandpass
filters
their
influence
on
characteristics
generated
soliton
pulses.
Our
analysis
showed
that
various
sideband
structures
were
induced
by
filter
dispersion
profiles
shaped
through
interaction
wave.
In
addition,
improved
intensity
phase
noise
significantly,
we
optimal
conditions
for
both
types
noise.
By
adding
10
nm
to
resonator,
2-
2.6
times,
respectively.
Abstract
Ultrafast
polarization‐maintaining
fiber
lasers
(UPMFLs),
with
superior
optical
performance
and
high
immunity
to
environmental
disturbances,
are
highly
preferable
in
a
variety
of
industrial
scientific
applications
such
as
high‐precision
micromachining
biomedical
imaging.
Especially,
the
utilization
PM
fibers
endows
laser
intrinsic
stability,
thereby
enabling
construction
robust
low‐noise
frequency
comb
systems.
To
meet
more
demanding
application
challenges,
continuous
efforts
have
been
invested
design
fabrication
UPMFLs,
aiming
reach
unprecedented
levels
various
pulse
parameters,
that
is,
achieve
shorter
duration,
higher
or
lower
repetition
rate,
energy.
This
review
presents
detailed
overview
different
passive
mode‐locking
techniques
for
pulsed
operation
most
significant
achievements
UPMFLs.
Representative
advances
at
1.0,
1.55,
2.0
µm
spectral
regions
presented
summarized.
The
state‐of‐the‐art
lasing
is
application‐oriented,
conversely,
improvements
all‐PM
promote
emerging
applications,
which
also
discussed
analyzed.
How
overcome
bottlenecks
UPMFLs
terms
emission
wavelength,
energy
make
them
powerful
tools
physical,
medical,
biological
remains
challenging
future.
Optics Express,
Journal Year:
2023,
Volume and Issue:
31(23), P. 37537 - 37537
Published: Oct. 12, 2023
We
experimentally
and
numerically
demonstrate
the
all-normal
dispersion
(ANDi)
ytterbium
(Yb)-doped
fiber
laser
based
on
nonlinear
amplifying
loop
mirror
(NALM)
mode-locked,
which
allows
tunable
single-wavelength
dual-wavelength
outputs.
The
pulses
tuning
ranges
of
are
from
1032.24
nm
to
1053.13
1047.94
1069.05
nm,
repetition
frequency
difference
varies
1766Hz
1834Hz.
To
our
knowledge,
this
is
widest
range
Yb-doped
lasers
NALM
mode-locked.
test
for
90
minutes
have
high
stability
in
both
dual-wavelength.
In
addition,
pulsed
collision
dynamics
between
two
solitons
at
different
wavelengths
studied.
Numerical
results
show
that
during
pulse
collision,
pass
through
each
other
maintain
their
properties,
also
confirms
particle
nature
isolated
wave.
Our
research
contributes
mode-locked
provides
what
we
believe
be
a
new
idea
dual-comb
sources.
Optics Letters,
Journal Year:
2023,
Volume and Issue:
48(16), P. 4312 - 4312
Published: July 24, 2023
We
present
an
all-polarization-maintaining
mode-locked
fiber
laser
based
on
a
nonlinear
amplifying
loop
mirror
utilizing
3
×
coupler.
A
pump
diode
placed
outside
the
cavity
pumps
both
oscillator
and
amplifier.
This
configuration
effectively
utilizes
all
ports
of
coupler,
making
compact
low-cost,
has
great
potential
as
seed
for
ultrashort
pulse
lasers.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
16(31), P. 14574 - 14588
Published: Jan. 1, 2024
Micro-supercapacitors
(MSCs)
play
a
crucial
role
as
micro-power
sources
for
on-chip
electronics.
This
review
comprehensively
summarizes
recent
advances
in
laser-machined
MSCs
and
their
integration
into
smart
microsystems.
Journal of Lightwave Technology,
Journal Year:
2024,
Volume and Issue:
42(9), P. 3376 - 3384
Published: Jan. 9, 2024
Nonreciprocity
of
traditional
filters
severely
limits
their
tunability.
To
tap
alternatives,
here
we
propose
hybrid
wavelength
manipulation
with
enhanced
ambient-thermal-drift
adaptability
in
an
all-polarization-maintaining
fiber
laser.
A
multifunctional
2-in-1
device,
which
is
based
on
a
CNTs-coated
tapered
panda
and
specially
designed
PMMA
(polymethyl
methacrylate)
package,
fabricated
applied
to
induce
nonlinear
saturable
absorption
spectral
filtering.
In
particular,
tuning
enabled
by
the
combination
mechanical
non-mechanical
mechanisms,
thus
greatly
prompting
flexibility
efficiency.
As
wide
as
40-nm
range
C-
short
L-band
covered,
coefficients
0.0116
nm/μϵ
0.77
nm/°C
respectively
via
stretching
heating
fiber.
Meanwhile,
twisting
induces
steady
dualwavelength
mode-locking.
Required
amount
adjustment
also
cut
nearly
half
contrast
previously
reported
works.
Besides,
great
thermal
expansion
introduces
adaptative
compensation
towards
ambient
fluctuation,
resulting
over
4.7
times
improvement.
Numerical
analysis
studied
for
optimal
design
filters.
This
work
explores
promising
solutions
advanced
tunable
ultrafast
lasers.
