We
present
an
experimental
investigation
of
supercontinuum
generation
in
potassium
gadolinium
tungstate
(KGW)
and
yttrium
vanadate
(YVO)
crystals
pumped
with
210
fs,
1030
nm
pulses
from
amplified
Yb:KGW
laser
operating
at
2
MHz
repetition
rate.
demonstrate
that
compared
to
commonly
used
sapphire
YAG,
these
materials
possess
considerably
lower
thresholds,
produce
remarkable
red-shifted
spectral
broadenings
(up
1700
YVO
up
1900
KGW)
exhibit
less
bulk
heating
due
energy
deposition
during
filamentation
process.
Moreover,
durable
damage-free
performance
was
observed
without
any
translation
the
sample,
suggesting
KGW
are
excellent
nonlinear
for
high
rate
near
short-wave
infrared
range.
Optics Letters,
Journal Year:
2022,
Volume and Issue:
48(2), P. 506 - 506
Published: Dec. 19, 2022
High
repetition
rate
femtosecond
filaments
in
transparent
solids
produce
conical
third
harmonic
generation
due
to
filament-induced
material
reorganization
the
form
of
periodic
volume
nanogratings.
Here
we
report
on
that
accompanies
supercontinuum
fused
silica
using
broadly
tunable
pulses.
The
measurement
cone
angles
with
driving
wavelengths
1-3-μm
range
fully
supports
noncollinear
phase-matching
scenario
involves
a
reciprocal
lattice
vector
filament-inscribed
nanograting.
nanograting
provides
an
octave-spanning
bandwidth,
as
attested
by
measurements
angle-resolved
spectra
broadband
emission.
We
report
on
the
generation
of
a
passive
carrier-envelope
phase
(CEP)
stable
1.7-cycle
pulse
in
mid-infrared
by
adiabatic
difference
frequency
generation.
With
sole
material-based
compression,
we
achieve
sub-2
cycle
16
fs
at
center
wavelength
2.7
μm
and
measured
CEP
stability
<190
mrad
RMS.
The
stabilization
performance
an
downconversion
process
is
characterized
for
first
time.
We
report
on
the
generation
of
a
passive
carrier-envelope
phase
(CEP)
stable
1.7-cycle
pulse
in
mid-infrared
by
adiabatic
difference
frequency
generation.
With
sole
material-based
compression,
we
achieve
sub-2
cycle
16
fs
at
center
wavelength
2.7
μm
and
measured
CEP
stability
<190
mrad
RMS.
The
stabilization
performance
an
downconversion
process
is
characterized
for
first
time.
We
present
an
experimental
investigation
of
supercontinuum
generation
in
potassium
gadolinium
tungstate
(KGW)
and
yttrium
vanadate
(YVO)
crystals
pumped
with
210
fs,
1030
nm
pulses
from
amplified
Yb:KGW
laser
operating
at
2
MHz
repetition
rate.
demonstrate
that
compared
to
commonly
used
sapphire
YAG,
these
materials
possess
considerably
lower
thresholds,
produce
remarkable
red-shifted
spectral
broadenings
(up
1700
YVO
up
1900
KGW)
exhibit
less
bulk
heating
due
energy
deposition
during
filamentation
process.
Moreover,
durable
damage-free
performance
was
observed
without
any
translation
the
sample,
suggesting
KGW
are
excellent
nonlinear
for
high
rate
near
short-wave
infrared
range.
