High Power Laser Science and Engineering,
Journal Year:
2024,
Volume and Issue:
12
Published: Jan. 1, 2024
Abstract
We
demonstrate
the
post-compression
of
GW-level
femtosecond
pulse
in
a
solid-state
multi-pass
cell
(MPC)
by
pre-chirp
management
method.
When
laser
is
positively
pre-chirped,
200
μJ
170
fs
input
compressed
to
163
44
at
output,
corresponding
transmission
81%
and
shortening
factor
3.86.
negatively
spectral
evolution,
as
propagates
MPC,
characterized
and,
eventually,
duration
51
fs,
3.3.
After
driving
goes
through
managed
MPC
device,
power
stability
beam
quality
are
almost
preserved.
The
experimental
results
offer
viable
path
toward
high-peak-power
pulses.
Optics Express,
Journal Year:
2024,
Volume and Issue:
32(8), P. 13235 - 13235
Published: Feb. 7, 2024
Multi-pass
cell
(MPC)
compressors
have
proven
to
be
the
method
of
choice
for
compression
high
average
power
long-pulse
Yb
lasers.
Yet,
generating
sub-30
fs
pulses
at
pulse
energy
with
compact
and
simple
components
remains
a
challenge.
This
work
demonstrates
an
efficient
cost-effective
approach
nonlinear
using
hybrid
air-bulk
MPC.
By
carefully
balancing
relative
contributions
ambient
air
fused
silica,
we
achieve
strong
spectral
broadening
without
dispersion
engineering
or
pressure-control
inside
400-µJ
energy.
In
this
way,
compress
from
220
27
40.3
W
(100
kHz
repetition
rate),
enhancing
peak
1.6
GW
10.2
while
maintaining
78%
within
main
pulse.
Our
combines
strengths
gas-filled
bulk
schemes
exhibits
excellent
overall
optical
transmission
(91%)
uniformity.
Moreover,
utilize
INSIGHT
technique
investigate
spatio-temporal
couplings
geometrical
aberrations
compressed
results
demonstrate
remarkable
temporal
homogeneity,
Strehl
ratio
0.97
consistently
observed
throughout
entire
profile.
Additionally,
all
spectrally-integrated
Zernike
coefficients
maintain
values
below
0.02λ.
CIRP Annals,
Journal Year:
2024,
Volume and Issue:
73(2), P. 533 - 559
Published: Jan. 1, 2024
Today,
tailored
laser
beams
are
rarely
used
and
thus
an
opportunity
to
optimize
existing
or
introduce
new
processes
is
missed.
New
methods
of
dynamic
beam
shaping
have
the
potential
change
that
in
future.
This
keynote
paper
deals
with
allowing
a
transient
energy
input
into
workpiece
at
such
time
scales
underlying
interaction
guided
towards
desired
result.
It
shows
principles,
categorizes
necessary
system
technology,
gives
application
examples
familiarize
reader
topic.
postulates
time-scale-dependent
coupling
between
addressed
process
features
key
for
achieving
optimum.
Optica,
Journal Year:
2024,
Volume and Issue:
11(10), P. 1368 - 1368
Published: Aug. 27, 2024
SESAM
modelocked
oscillators
are
interesting
for
applications
in
strong-field
physics
such
as
high-harmonic
generation
and
attosecond
science
at
high
repetition
rates
or
frequency
combs
the
ultraviolet.
Here
we
present
a
ultrafast
thin-disk
laser
oscillator
providing
550W
of
average
output
power
with
852fs
pulses
5.5MHz
rate.
To
reach
this
significant
scaling,
replicating
cavity
design
is
utilized.
The
delivers
103
MW
peak
pulse
energy
100
µJ
beam
quality
M
2
<1.2,
optical-to-optical
efficiency
35%.
advances
manufacturing
that
enabled
result
discussed,
well
practical
challenges
when
scaling
to
kW-class.
When
combined
established
compression
technologies,
can
enable
simpler
systems
by
avoiding
complexity
chirped
amplifier
chains.
Additionally,
support
much
lower
noise
floor
due
reduced
influence
shot
noise,
which
may
provide
route
more
sensitive
pump-probe
measurements.
Optics Letters,
Journal Year:
2024,
Volume and Issue:
49(10), P. 2717 - 2717
Published: April 17, 2024
We
report
an
amplification-free
thin-disk
laser
system
delivering
0.9
GW
peak
power.
The
120
fs
pulses,
at
14
MHz,
centered
around
1
µm,
containing
12.8
µJ
delivered
by
a
oscillator,
were
compressed
factor
15
down
to
8.0
with
148
W
average
output
power
and
overall
82%
efficiency.
Additionally,
we
showed
that
even
sub-two-cycle
operation
6.2
can
be
reached
this
technology.
will
crucial
part
of
the
XUV
frequency
comb
being
developed
unique
high-repetition
rate
driver
for
attosecond
pulse
generation.
Optics Express,
Journal Year:
2023,
Volume and Issue:
31(12), P. 19554 - 19554
Published: April 5, 2023
Since
its
first
demonstration
in
2016,
the
multi-pass
spectral
broadening
technique
has
covered
impressive
ranges
of
pulse
energy
(3
µJ
-
100
mJ)
and
peak
power
(4
MW
GW).
Energy
scaling
this
into
joule-level
is
currently
limited
by
phenomena
such
as
optical
damage,
gas
ionization
spatio-spectral
beam
inhomogeneity.
These
limitations
can
be
overcome
novel
convex-concave
arrangement,
which
exhibits
crucial
properties
large
mode
size
compactness.
In
a
proof-of-principle
experiment,
260
fs,
15
200
pulses
are
broadened
subsequently
compressed
to
approximately
50
fs
with
90%
efficiency
excellent
homogeneity
across
profile.
We
simulate
proposed
concept
for
40
mJ
1.3
ps
input
discuss
possibility
further
scaling.
Optics Letters,
Journal Year:
2025,
Volume and Issue:
50(7), P. 2207 - 2207
Published: Feb. 24, 2025
We
propose
a
method
for
generating
extremely
short
(few-
and
even
subcycle)
ultraviolet
(UV)
pulses
with
the
use
of
three-color
ionizing
fields.
demonstrate
that
low-order
combination
frequencies
can
form
supercontinuum
up
to
fifth
harmonic
fundamental
field.
This
effect
is
achieved
by
using
fields
two
weak
components
detuned
from
half
frequency
intense
field,
which
be
obtained
an
optical
parametric
generator.
Our
calculations
based
on
solution
time-dependent
Schrödinger
equation
helium
atom
show
near-infrared
field
duration
25
fs
result
in
UV
pulse
central
wavelength
about
300
nm
full
width
at
maximum
intensity
0.9
fs.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 2, 2025
Abstract
Optical
solitons
in
multimode
nonlinear
optical
systems
offer
a
unique
platform
for
exploring
the
interplay
of
nonlinearity,
dispersion,
and
spatial
mode
coupling,
offering
insights
into
complex
wave
phenomena.
Multi-pass
cavities
(MPCs)
incorporating
Kerr
media
serve
as
prototypical
systems,
enabling
high-efficiency
supercontinuum
generation
pulse
compression.
However,
stabilizing
femtosecond
laser
pulses
solid-medium-based
MPCs
(solid
MPCs)
under
high
nonlinearity
remains
significant
challenge
due
to
which
disrupts
beam
stability.
In
this
work,
we
address
by
investigating
stability
using
Floquet
analysis
first-order
perturbation
theory.
We
identify
novel
mode-coupling-suppression
(MCS)
medium
lengths,
where
destructive
interference
among
components
suppresses
coupling
facilitates
soliton
stabilization.
Under
MCS
conditions,
demonstrate
stable
propagation
solid
with
phases
up
1.85π
per
pass,
achieving
10-fold
compression
exceptional
spatio-spectral
homogeneity.
Our
findings
valuable
guidance
designing
advanced
tailored
media.
APL Photonics,
Journal Year:
2025,
Volume and Issue:
10(4)
Published: April 1, 2025
We
present
an
in-depth
study
on
the
impact
of
spatiotemporal
Raman
enhancement
in
molecular
gas-filled
hollow-core
fibers
(HCFs),
demonstrating
efficient
generation
and
post-compression
multidimensional
solitary
states
(MDSS).
Through
different
experimental
scenarios—employing
large-core
HCFs
filled
with
gases
(N2
N2O)
driven
by
high
energy,
sub-picosecond
picosecond
Fourier
transform-limited
ytterbium
laser
pulses—this
work
leverages
multimode
propagation
enhanced
interactions
to
achieve
significant
spectral
broadening
asymmetric
redshift,
contrasting
sharply
self-phase
modulation.
Our
findings
reveal
that,
beyond
regime
maximum
nonadiabatic
alignment,
nonlinear
primarily
governs
for
input
pulse
durations
up
1
ps.
The
process
shows
limited
sensitivity
duration
two
investigated
N2O),
only
subtle
differences
arising
from
their
distinct
spectroscopic
properties.
Furthermore,
MDSS
was
achieved
various
cases.
Notably,
using
7
mJ,
ps
pulses,
we
generated
22
fs
pulses
a
47%
energy
conversion
efficiency
energy.
These
results
position
as
powerful
platform
generating
high-energy,
ultrashort
tunable
wavelengths,
offering
robust
solution
applications
such
harmonic
generation.
Optics Letters,
Journal Year:
2023,
Volume and Issue:
48(10), P. 2579 - 2579
Published: March 28, 2023
We
generated
1.7-cycle
and
35-$\mu$J
pulses
at
a
1-MHz
repetition
rate
by
using
two-stage
multiple
plate
continuum
compression
of
Yb-laser
with
80-W
average
input
power.
By
adjusting
the
positions
careful
consideration
thermal
lensing
effect
due
to
high
power,
we
compressed
output
pulse
184-fs
initial
duration
5.7
fs
only
group-delay-dispersion
compensation.
This
achieved
sufficient
beam
quality
($M^2$
<
1.5)
reaching
focused
intensity
over
10$^{14}$
W/cm$^2$
spatial-spectral
homogeneity
(98%).
Our
study
holds
promise
for
MHz-isolated-attosecond-pulse
source
advanced
attosecond
spectroscopic
imaging
technologies
unprecedentedly
signal-to-noise
ratios.
