Optics Continuum,
Год журнала:
2022,
Номер
1(5), С. 1157 - 1157
Опубликована: Апрель 11, 2022
High-power,
high-energy,
ultrashort,
mid-infrared
(MID-IR)
laser
systems
operating
at
high
repetition
rates
are
of
considerable
interest
for
many
science
applications,
such
as
coherent
vibrational
spectroscopy,
label-free
imaging,
time-resolved
pump-probe
and
high-harmonic
generation
studies.
We
developed
an
optical
parametric
chirped-pulse
amplifier
(OPCPA)
system
employing
a
difference-frequency
in
lithium
gallium
sulfide
nonlinear
crystal
the
final
stage,
which
provides
principle
possibility
passive
carrier-envelop-phase
(CEP)
stability.
The
OPCPA
efficiently
down-converts
1
μ
m
200
J
Yb-YAG
pump
pulse
into
MID-IR
spectral
range
generating
J-level
pulses
rate
kHz.
Two
modes
operations
providing
complimentary
properties
presented.
Depending
on
envisaged
application,
one
can
switch
between
(a)
wavelength-tunable
(4.2–11
m)
source
(b)
broadband
centered
≈8.5
by
controlling
group-delay
dispersion
signal
pulse.
broadband,
high-energy
have
short
duration
74±2
fs,
corresponds
to
only
≈3
cycles
central
wavelength
8.5
m.
Applied Optics,
Год журнала:
2021,
Номер
60(22), С. 6600 - 6600
Опубликована: Июль 6, 2021
This
paper
reports
refined
Sellmeier
equations
for
the
biaxial
nonlinear
crystal
B
mathvariant="normal">a
mathvariant="normal">G
4
mathvariant="normal">S
7
that
provide
a
good
reproduction
of
phase-matching
angles
second-harmonic
generation
(SHG)
and
sum-frequency
(SFG)
mid-IR
outputs
Nd:YAG
Ho:YLF
laser-pumped
optical
parametric
oscillators
(OPOs)
frequency-doubled
mathvariant="normal">C
mathvariant="normal">O
2
laser
in
0.7584–8.018
µm
range.
The
theoretical
results
are
found
to
agree
with
recent
experimental
data
1-µm-pumped
processes
based
on
beyond
8
µm.
Optics Express,
Год журнала:
2024,
Номер
32(27), С. 48599 - 48599
Опубликована: Ноя. 25, 2024
A
2.6-fold
spectral
broadening
of
mid-infrared
femtosecond
µJ-level
pulses
has
been
achieved
using
an
unfolded
multi-pass
configuration
germanium
plates
and
zinc
selenide
lenses.
This
method
maintains
a
throughput
higher
than
60%
while
preserving
the
spatial
quality
temporal
duration
input
beam.
Numerical
simulations
match
experimental
results
show
potential
to
tailor
parameters
cell
obtain
different
spectra.
Optics Continuum,
Год журнала:
2022,
Номер
1(5), С. 1157 - 1157
Опубликована: Апрель 11, 2022
High-power,
high-energy,
ultrashort,
mid-infrared
(MID-IR)
laser
systems
operating
at
high
repetition
rates
are
of
considerable
interest
for
many
science
applications,
such
as
coherent
vibrational
spectroscopy,
label-free
imaging,
time-resolved
pump-probe
and
high-harmonic
generation
studies.
We
developed
an
optical
parametric
chirped-pulse
amplifier
(OPCPA)
system
employing
a
difference-frequency
in
lithium
gallium
sulfide
nonlinear
crystal
the
final
stage,
which
provides
principle
possibility
passive
carrier-envelop-phase
(CEP)
stability.
The
OPCPA
efficiently
down-converts
1
μ
m
200
J
Yb-YAG
pump
pulse
into
MID-IR
spectral
range
generating
J-level
pulses
rate
kHz.
Two
modes
operations
providing
complimentary
properties
presented.
Depending
on
envisaged
application,
one
can
switch
between
(a)
wavelength-tunable
(4.2–11
m)
source
(b)
broadband
centered
≈8.5
by
controlling
group-delay
dispersion
signal
pulse.
broadband,
high-energy
have
short
duration
74±2
fs,
corresponds
to
only
≈3
cycles
central
wavelength
8.5
m.
