APL Photonics,
Journal Year:
2023,
Volume and Issue:
8(11)
Published: Nov. 1, 2023
Ultrabroadband
electro-optic
sampling
using
few-optical-cycle
probing
pulses
is
a
sensitive
technique
to
detect
electric
field
amplitudes
with
high
dynamic
range
and
up
near-infrared
optical
frequencies.
By
combining
this
method
dual-frequency-comb
spectroscopy
new
class
of
ultrafast
lasers,
we
perform
high-resolution,
80
MHz/0.0027
cm−1
(10
MHz/0.0003
spectral
interleaving),
spectroscopic
measurements
in
the
frequency
1.5–45
THz
(6.6–200
µm),
excluding
strongly
absorbing
Reststrahlen
band
lattice
resonances
at
4.5–9
THz,
an
instantaneous
coverage
exceeding
octave
(e.g.,
9–22
μm).
As
driving
source,
use
pair
mutually
coherent
combs
from
Kerr-lens
mode-locked
solid-state
Cr:ZnS
(2.35
μm)
lasers.
One
downconverted
via
intrapulse
difference
generation
produce
longwave
“sensing”
comb,
while
second
comb
doubled
near-IR
“probe”
for
(EOS).
The
low
intensity
phase
noise
our
dual-comb
system
allow
capturing
large
amount
information
(200
000
comb-mode-resolved
lines
spaced
by
MHz)
mid-IR
portion
spectrum
video
rate
69
Hz,
signal-to-noise
ratio
limited
shot
EOS
balanced
detection
system.
Our
low-pressure
gaseous
ethanol,
isoprene,
dimethyl
sulfide
reveal
Doppler-limited
signatures
that
have
never
been
explored
before.
Communications Physics,
Journal Year:
2019,
Volume and Issue:
2(1)
Published: Dec. 6, 2019
Abstract
Optical
frequency
combs
were
developed
nearly
two
decades
ago
to
support
the
world’s
most
precise
atomic
clocks.
Acting
as
precision
optical
synthesizers,
enable
transfer
of
phase
and
information
from
a
high-stability
reference
hundreds
thousands
tones
in
domain.
This
versatility,
coupled
with
near-continuous
spectroscopic
coverage
microwave
frequencies
extreme
ultra-violet,
has
enabled
measurement
capabilities
both
fundamental
applied
contexts.
review
takes
tutorial
approach
illustrate
how
20
years
source
development
technology
facilitated
journey
lab
into
field.
Science,
Journal Year:
2020,
Volume and Issue:
369(6501)
Published: July 17, 2020
An
optical
timekeeper
Optical
clocks,
based
on
transitions
of
atoms,
operate
at
much
higher
frequency
than
the
microwave
atomic
clocks
currently
used
as
our
timing
standards.
They
have
been
shown
to
exhibit
better
stability
and
are
poised
redefine
second.
The
development
stable,
self-referenced
combs
that
span
wavelengths
has
key
these
efforts.
Diddams
et
al.
reviewed
developments
refinements
over
past
20
years
provide
an
overview
where
they
finding
application,
from
precision
high-resolution
spectroscopy
imaging,
ranging,
navigation.
Science
this
issue
p.
eaay3676
Nature Communications,
Journal Year:
2019,
Volume and Issue:
10(1)
Published: Sept. 27, 2019
Vibrational
spectroscopy,
comprised
of
infrared
absorption
and
Raman
scattering
is
widely
used
for
label-free
optical
sensing
imaging
in
various
scientific
industrial
fields.
The
two
molecular
spectroscopy
methods
are
sensitive
to
different
types
vibrations
provide
complementary
vibrational
spectra,
but
obtaining
complete
information
with
a
single
spectroscopic
device
challenging
due
the
large
wavelength
discrepancy
between
methods.
Here,
we
demonstrate
simultaneous
that
allows
us
measure
broadband
spectra
fingerprint
region
instrument
based
on
an
ultrashort
pulsed
laser.
system
dual-modal
Fourier-transform
enabled
by
efficient
use
nonlinear
effects.
Our
proof-of-concept
experiment
demonstrates
rapid,
high
spectral
resolution
measurements
organic
liquids
precise
accurate
analysis.
Nature Photonics,
Journal Year:
2022,
Volume and Issue:
16(7), P. 512 - 518
Published: May 26, 2022
Abstract
Tailoring
the
electric-field
waveform
of
ultrashort
light
pulses
forms
basis
for
controlling
nonlinear
optical
phenomena
on
their
genuine,
attosecond
timescale.
Here
we
extend
control
from
visible
and
near-infrared—where
it
was
previously
demonstrated—to
mid-infrared
spectral
range.
Our
approach
yields
single-cycle
infrared
over
several
octaves
first
time.
Sub-10-fs
a
carrier-envelope-phase-stabilized,
Kerr-lens-mode-locked,
diode-pumped
Cr:ZnS
laser
drive
cascaded
intrapulse
difference-frequency
generation
evolution
resulting
coherent
emission
0.9–12.0
μm.
Sub-cycle
field
in
this
wavelength
range
will
be
instrumental
launching
steering
few-femtosecond
electron/hole
wavepackets
low-gap
materials,
extending
bandwidth
electronic
signal
processing
to
multi-terahertz
frequencies,
as
well
electric-field-resolved
molecular
fingerprinting
biological
systems.
