Spatial-Light-Modulator-Based Multichannel Data Transmission by Vortex Beams of Various Orders
<p>View of a 13-channel filter defined by Equation (9) at <span class="html-italic">p</span> = 6: (<b>a</b>) phase of the filter, (<b>b</b>) intensity pattern (negative) in the focal plane and correspondence of diffraction orders to OV values.</p> "> Figure 2
<p>(<b>a</b>) The experimental setup for investigation of demultiplexing of OV beams and their superpositions using the proposed diffractive multichannel filter: Laser is as solid-state laser (λ = 532 nm), PH is a pinhole (aperture size 40 μm). L1, L2, L3, and L4 are lenses with focal lengths of 350, 200, 300, and 250 mm, SLM1 is a transmissive spatial light modulator (HOLOEYE, LC 2012 with 1024 × 768-pixel resolution), SLM 2 is a reflective spatial light modulator (HOLOEYE, PLUTO_VIS with 1920 × 1080-pixel resolution), D is a diaphragm, G is a vapor generator connected with a glass container, CAM is a video camera. (<b>b</b>) An example of the phase mask of the element generating the sent OAM state defined as <span class="html-italic">w</span>(φ) = exp (<span class="html-italic">i</span>2.5φ), μ = 2.5 and displayed onto the first SLM. (<b>c</b>) The phase mask of the proposed diffractive multichannel filter displayed onto the second SLM.</p> "> Figure 3
<p>Experimentally obtained results of the detection of light fields with different OAM states: (<b>a</b>) <span class="html-italic">w</span>(φ) = const, μ = 0 (correspondence of the diffraction orders in the focal plane to the OAM state is shown), (<b>b</b>) <span class="html-italic">w</span>(φ) = exp(−<span class="html-italic">i</span>2φ), μ = −2, (<b>c</b>) <span class="html-italic">w</span>(φ) = exp(−<span class="html-italic">i</span>1.25φ), μ = −1.25, (<b>d</b>) <span class="html-italic">w</span>(φ) = exp(<span class="html-italic">i</span>2.5φ), μ = 2.5, (<b>e</b>) <span class="html-italic">w</span>(φ) = exp(−<span class="html-italic">i</span>φ) + exp(<span class="html-italic">i</span>φ), μ = 0, (<b>f</b>) <span class="html-italic">w</span>(φ) = exp(−<span class="html-italic">i</span>2φ) + exp(<span class="html-italic">i</span>φ), μ = −0.5, (<b>g</b>) <span class="html-italic">w</span>(φ) = exp(–<span class="html-italic">i</span>φ) + exp(−<span class="html-italic">i</span>2φ), μ = −1.5, and (<b>h</b>) <span class="html-italic">w</span>(φ) = exp(–<span class="html-italic">i</span>φ) + exp(−<span class="html-italic">i2</span>φ) + exp(<span class="html-italic">i</span>2φ), μ = −0.33. The color dashed circles show the generated correlation peaks.</p> "> Figure 4
<p>Experimentally measured crosstalk matrix of OAM states using only (<b>a</b>) integer orders (i.e., the upper row of the proposed filter shown in <a href="#sensors-21-02988-f001" class="html-fig">Figure 1</a>), (<b>b</b>) half-integer orders (i.e., a bottom row of the proposed filter shown in <a href="#sensors-21-02988-f001" class="html-fig">Figure 1</a>).</p> "> Figure 5
<p>Experimentally measured crosstalk matrix of OAM states using both integer and half-integer TCs (i.e., both rows of the proposed filter shown in <a href="#sensors-21-02988-f001" class="html-fig">Figure 1</a>).</p> ">
Abstract
:1. Introduction
2. Development of Multichannel Filters and Modelling of the Sorting Process
3. Experimental Results
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Khonina, S.N.; Karpeev, S.V.; Butt, M.A. Spatial-Light-Modulator-Based Multichannel Data Transmission by Vortex Beams of Various Orders. Sensors 2021, 21, 2988. https://doi.org/10.3390/s21092988
Khonina SN, Karpeev SV, Butt MA. Spatial-Light-Modulator-Based Multichannel Data Transmission by Vortex Beams of Various Orders. Sensors. 2021; 21(9):2988. https://doi.org/10.3390/s21092988
Chicago/Turabian StyleKhonina, Svetlana N., Sergey V. Karpeev, and Muhammad A. Butt. 2021. "Spatial-Light-Modulator-Based Multichannel Data Transmission by Vortex Beams of Various Orders" Sensors 21, no. 9: 2988. https://doi.org/10.3390/s21092988