Optical and Quantum Electronics,
Journal Year:
2023,
Volume and Issue:
56(1)
Published: Nov. 23, 2023
Abstract
Photoacoustic
(PA)
medical
imaging
is
a
crossbred
technique
relying
on
light-induced
ultrasonic
waves
due
to
the
PA
effect
phenomenon
recorded
primarily
in
1880
by
A.
G.
Bell.
Numerical
simulation,
also
known
as
in-silico,
studies
assist
scientists
minimizing
incorrect
experiments
both
in-vitro
and
in-vivo.
modeling
techniques
help
achieve
fast
simulation
process
contrast
pure
mathematics
alone.
However,
if
suitable
facilitated
mathematical
model
can
be
established
prior
applying
numerical
modeling,
it
will
of
great
interest
whole
numeric
model.
Numerous
equations,
theorems,
propositions
have
been
proposed
signal
generation
propagation
biological
media.
most
them
are
complicated
difficult
understood
researchers,
especially
beginners.
That’s
why
this
paper
was
introduced.
Our
aims
simplify
understanding
biomedical
waves.
We
developed
for
entire
process.
The
introduced
based
three
steps:
(1)
pulsed
laser
stimulation,
(2)
light
diffusion,
(3)
stress
wave
propagation.
has
implemented
utilizing
COMSOL
Multiphysics,
which
relies
finite
element
method
(FEM)
principle.
in-silico
time-dependent
study's
results
confirmed
that
simple,
efficient,
accurate,
quick
starting
point
researchers
simulate
signals'
any
software
such
multiphysics.
Optica,
Journal Year:
2024,
Volume and Issue:
11(3), P. 385 - 385
Published: Feb. 20, 2024
Scattering
is
not
necessarily
an
obstacle
to
imaging.
It
can
help
enhance
imaging
performance
beyond
the
reach
of
a
lens
system.
However,
current
scattering-enhanced
systems
require
prior
knowledge
transmission
matrix.
There
are
also
some
techniques
that
do
such
see
through
strongly
scattering
media,
but
results
still
limited
by
optics
used.
Here
we
propose
overcoming
diffraction
limit
visually
opaque
diffuser.
By
controlling
distance
between
diffuser
and
system,
light
with
higher
spatial
frequencies
scattered
into
entrance
pupil.
With
deformed
wavefront
corrected,
experimentally
achieved
3.39×
enhancement
Rayleigh
limit.
In
addition,
our
method
works
well
for
objects
4×
larger
than
memory
effect
range
maintain
super-resolution
depth
field
6.6×
achieve.
Using
method,
obstructive
medium
throughput
even
though
matrix
has
been
measured
beforehand.
Advanced Photonics,
Journal Year:
2024,
Volume and Issue:
6(02)
Published: Feb. 28, 2024
Structured
light,
where
complex
optical
fields
are
tailored
in
all
their
degrees
of
freedom,
has
become
highly
topical
late,
advanced
by
a
sophisticated
toolkit
comprising
both
linear
and
nonlinear
optics.
Removing
undesired
structure
from
light
is
far
less
developed,
leveraging
mostly
on
inverting
the
distortion,
e.g.,
with
adaptive
optics
or
inverse
transmission
matrix
channel,
requiring
that
distortion
be
fully
characterized
through
appropriate
measurement.
We
show
distortions
spatially
structured
can
corrected
difference-frequency
generation
crystal
without
any
need
for
to
known.
demonstrate
versatility
our
approach
using
wide
range
aberrations
modes,
including
higher-order
orbital
angular
momentum
(OAM)
beams,
showing
excellent
recovery
original
undistorted
field.
To
highlight
efficacy
this
process,
we
deploy
system
prepare-and-measure
communications
link
OAM,
minimal
cross
talk
even
when
channel
aberrated,
outline
how
could
extended
alternative
experimental
modalities
processes.
Our
demonstration
light-correcting
measurement
opens
an
measurement-free
error
correction
classical
quantum
direct
applications
imaging,
sensing,
communication.
Pushing
the
information
states'
acquisition
efficiency
has
been
a
long-held
goal
to
reach
measurement
precision
limit
inside
scattering
spaces.
Recent
studies
have
indicated
that
maximal
states
can
be
attained
through
engineered
modes;
however,
partial
intrusion
is
generally
required.
While
non-invasive
designs
substantially
explored
across
diverse
physical
scenarios,
of
dynamic
spaces
remains
challenging
due
intractable
non-unique
mapping
problem,
particularly
in
context
multi-target
scenarios.
Here,
we
establish
feasibility
experimentally
for
first
time
by
introducing
tandem-generated
adversarial
network
framework
To
illustrate
framework's
efficacy,
demonstrate
efficient
scenarios
achieve
Fisher
solely
utilization
external
matrix
system.
Our
work
provides
insightful
perspectives
precise
measurements
complex
systems.
