Detecting Lateral Motion using Light’s Orbital Angular Momentum

@article{Cvijetic2015DetectingLM,
  title={Detecting Lateral Motion using Light’s Orbital Angular Momentum},
  author={Neda Cvijetic and Giovanni Milione and Ezra Ip and Ting Wang},
  journal={Scientific Reports},
  year={2015},
  volume={5}
}
Interrogating an object with a light beam and analyzing the scattered light can reveal kinematic information about the object, which is vital for applications ranging from autonomous vehicles to gesture recognition and virtual reality. We show that by analyzing the change in the orbital angular momentum (OAM) of a tilted light beam eclipsed by a moving object, lateral motion of the object can be detected in an arbitrary direction using a single light beam and without object image reconstruction… 
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85 Citations
Background Citations
18
Methods Citations
3

85 Citations

Transferring linear motion of an optical wedge to rotational frequency shift in an orbital angular momentum interferometer
We build a modified Mach-Zehnder (M-Z) interferometer with an embedded Dove prism in one arm to observe the interference between two conjugate orbital angular momentum (OAM) beams. By inserting and…
Detection of spinning objects at oblique light incidence using the optical rotational Doppler effect.
TLDR
The analytic results indicate that even if the rotational axis of the spinning object is oriented at a specific tilt angle relative to the light propagation direction, theRotational speed can still be extracted from an asymmetrically broadened Doppler signal.
A phase-to-intensity strategy of angular velocity measurement based on photonic orbital angular momentum
Abstract Recently, orbital angular momentum (OAM) has been adopted to measure the shape of static objects and the translation motion of moving objects in optical remote sensing. Most of these studies…
Using a complex optical orbital-angular-momentum spectrum to measure object parameters.
TLDR
This work measures an object's opening angle using orbital-angular-momentum (OAM) -based complex spectrum, achieving a >15  dB signal-to-noise ratio and finds that the dip and slope of the OAM phase spectrum are dependent on the opening's orientation but independent of the opening angle.
Tiny velocity measurement using rotating petal-like mode of orbital angular momentum.
TLDR
This proposed system employs an interference structure in which the reference and measurement paths are filled by two light beams carrying opposite-sign orbital angular momentum (OAM) respectively and achieves a high-accuracy tiny velocity measurement with a measurement error rate that is less than 10 nm/s.
Digital spiral object identification using random light
TLDR
It is demonstrated that the spatial signatures and phase information of an object with rotational symmetries can be identified using classical orbital angular momentum correlations in random light, and the technique is robust against environmental noise, a fundamental feature of any realistic scheme for remote sensing.
Optical heterodyne detection of orthogonal orbital angular momentum modes for sensing through turbid media
Remote sensing modalities can utilize the effects of laser scattering from particulate matter to infer information about environmental conditions present in the optical path. Light contains many…
Observation of the rotational Doppler shift of the ring Airy Gaussian vortex beam
Generation of optical orbital angular momentum light by an azimuthally-graded refractive index plate
We propose and numerically demonstrate a method to generate orbital angular momentum (OAM) light by using an azimuthally graded index (AGI) plate of uniform subwavelength thickness. We illustrate,…
Rapidly tunable orbital angular momentum (OAM) system for higher order Bessel beams integrated in time (HOBBIT).
TLDR
By combining the linear tilted output from the AOD with the OAM generation capabilities of the HOBBIT system, the generated OAM modes become continuously tunable at high speeds measured on the order of 400 kHz.
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References

SHOWING 1-10 OF 37 REFERENCES
Detection of a Spinning Object Using Light’s Orbital Angular Momentum
TLDR
Using twisted light, Lavery et al. detected rotation with an analogous angular Doppler shift, which may be useful for remote sensing and observational astronomy, and the multiplicative enhancement of the frequency shift may have applications for the remote detection of rotating bodies in both terrestrial and astronomical settings.
Orbital angular momentum: origins, behavior and applications
As they travel through space, some light beams rotate. Such light beams have angular momentum. There are two particularly important ways in which a light beam can rotate: if every polarization vector…
Measurement of the light orbital angular momentum spectrum using an optical geometric transformation
We recently demonstrated a new method to efficiently analyse the orbital angular momentum (OAM) states of light by application of an optical geometric transformation (Berkhout et al 2010 Phys. Rev.…
Tweezers with a twist
The fact that light carries both linear and angular momentum is well-known to physicists. One application of the linear momentum of light is for optical tweezers, in which the refraction of a laser…
Analysis of orbital angular momentum of a misaligned optical beam
We report an analysis of the orbital angular momentum of an optical beam misaligned with respect to a reference axis. Both laterally displaced and angularly deflected Laguerre–Gaussian beams are…
Advances in optical angular momentum
Some 16 years ago, Allen et al. [Phys. Rev. A 45, 8185 (1992)] recognised that laser beams which carried an angular momentum additional to photon spin, could be realized in the laboratory. Such beams…
Angular diffraction
Angle and angular momentum are linked by a Fourier transformation. A restriction of the angular range within an optical beam profile therefore generates orbital angular momentum (OAM) sidebands on…
Application of orbital angular momentum to simultaneous determination of tilt and lateral displacement of a misaligned laser beam.
TLDR
The theory explains the symmetries and properties of the spectrum under the influence of misalignments and an improved technique for obtaining the orbital angular momentum spectrum employing Laguerre-Gaussian modes is proposed.
Internal flows and energy circulation in light beams
We review optical phenomena associated with the internal energy redistribution which accompany propagation and transformations of monochromatic light fields in homogeneous media. The total energy…
Intrinsic and extrinsic nature of the orbital angular momentum of a light beam.
TLDR
Numerical calculations of both spin and orbital angular momentum are confirmed by means of experiments with particles trapped off axis in optical tweezers, where the size of the particle means it interacts with only a fraction of the beam profile.
...
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