Self-pumped phase conjugation of light beams carrying orbital angular momentum

Woerdemann, Mike; Alpmann, Christina; Denz, Cornélia

doi:10.1364/oe.17.022791

Cited by 37 publications

(48 citation statements)

References 25 publications

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“…The research in TL spans several areas, such as the generation of beams [4,5], the interaction of TL with atoms and molecules [6,7] or with condensed matter [8][9][10][11][12][13][14][15][16][17][18][19][20]. TL has already proved to be useful in applications.…”

Section: Introductionmentioning

confidence: 99%

Formulation of the twisted-light–matter interaction at the phase singularity: The twisted-light gauge

2015

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Twisted light is light carrying orbital angular momentum. The profile of such a beam is a ring-like structure with a node at the beam axis, where a phase singularity exists. Due to the strong spatial inhomogeneity the mathematical description of twisted-light-matter interaction is non-trivial, in particular close to the phase singularity, where the commonly used dipole-moment approximation cannot be applied. In this paper we show that, if the handedness of circular polarization and the orbital angular momentum of the twisted-light beam have the same sign, a Hamiltonian similar to the dipole-moment approximation can be derived. However, if the signs differ, in general the magnetic parts of the light beam become of significant importance and an interaction Hamiltonian which only accounts for electric fields is inappropriate. We discuss the consequences of these findings for twisted-light excitation of a semiconductor nanostructures, e.g., a quantum dot, placed at the phase singularity.

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Section: Introductionmentioning

confidence: 99%

Formulation of the twisted-light–matter interaction at the phase singularity: The twisted-light gauge

2015

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“…It should be noted that the TC of the backward SBS signal is reversed when reflected by the PBS, while the OAM does not change. Therefore, we may conclude that the TC of the SBS signal reflected from the SBS PCM maintained the same TC with that of the incident vortex beam; the wavefront of the pump beam is exactly reversed and the OAM changed by 4ℏ [20] . In order to compare the reflection by SBS PCM with the reflection by a conventional mirror, a conventional mirror is placed after the PBS.…”

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confidence: 87%

Stimulated Brillouin scattering phase conjugation of light beams carrying orbit angular momentum (Invited Paper)

Chen

Chang

2017

Chin. Opt. Lett.

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We investigate the stimulated Brillouin scattering (SBS) properties of light beams carrying orbit angular momentum (OAM). The phase conjugation of light beams carrying OAM is experimentally achieved in an SBS mirror with a random phase plate. The spectrum and the pulse width compression of SBS light are measured. It is shown that the phenomena of pulse compression is observed and OAM conservation is confirmed in the SBS process. The OAM transfer from photons to phonons may find potential applications in photon-phonon conversion-based signal-processing schemes by using OAM multiplexing.

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“…The 3D distribution of intensity I speckle (z, t, r) is a random collection of pairs of helices with opposite handedness [36] ( fig.5). This feature of PC mirror ensures the phase-matched propagation of the phase-conjugated replica E b (z, t, r) [34]. The remarkable feature of this phase-conjugating laser interferometer technique [15,37] is a perfect compensation of the phase-piston errors ∆φ mn in backward propagation through the amplifying array [30]( fig.5).…”

Section: Model Formulationmentioning

confidence: 99%

Coherent chirped pulse laser network with Mickelson phase conjugator

Okulov¹

2014

Appl. Opt.

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The mechanisms of nonlinear phase-locking of a large fiber amplifier array are analyzed. It is shown that Michelson phase conjugating configuration with double passage through array of fiber amplifiers have the definite advantages compared to one-way fiber array coupled in a MachZehnder configuration. Regardless to amount of synchronized fiber amplifiers Michelson phaseconjugating interferometer is expected to do a perfect compensation of the phase-piston errors and collimation of backwardly amplified fiber beams on entrance/output beamsplitter. In both configurations the nonlinear transformation of the stretched pulse envelope due to gain saturation is capable to randomize the position of chirp inside envelope thus it may reduce the visibility of interference pattern at output beamsplitter. A certain advantages are inherent to the sech-form temporal envelope because of exponential precursor and self-similar propagation in gain medium. The Gaussian envelope is significantly compressed in a deep gain saturation regime and frequency chirp position inside pulse envelope is more deformed.

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Self-pumped phase conjugation of light beams carrying orbital angular momentum

Cited by 37 publications

References 25 publications

Formulation of the twisted-light–matter interaction at the phase singularity: The twisted-light gauge

Formulation of the twisted-light–matter interaction at the phase singularity: The twisted-light gauge

Stimulated Brillouin scattering phase conjugation of light beams carrying orbit angular momentum (Invited Paper)

Coherent chirped pulse laser network with Mickelson phase conjugator

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