Nonlinear phase-conjugate mirrors for atmospheric distortion compensation

Romanov, N. A.; Leshchev, Alexey; Rodionov, Andrei; Семенов, В. Е.; Sherstobitov, V E; Vysotina, N. V.

doi:10.1117/12.349231

Cited by 2 publications

(2 citation statements)

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“…Although many works used OPC with the free space optics, they focused on achieving the laser target‐aiming and improving the energy concentration of the laser spot in the imaging systems [7]. The OPC has a simple structure, short response time, and a minor limitation of the affordable spatial frequencies owing to its all‐optical characteristics [8]. The signal phase distortion can be conjugated and compensated as the optical carrier propagating back through the atmospheric channel.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of an optical phase conjugation based dual‐hop PDM‐QPSK free‐space optical communication link

Chen

Liu

et al. 2022

Electronics Letters

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The dual‐hop free‐space optical (FSO) communication link for polarization‐division multiplexing quadrature phase‐shift keying (PDM‐QPSK) signals is proposed and experimentally demonstrated in an atmospheric chamber with the optical phase conjugation (OPC) compensating the turbulence‐induced signal distortions. The phase fluctuations can be effectively reduced by the OPC, as the error vector magnitudes are 10.03% and 8.28% decreased for x‐ and y‐polarization. At the bit error rate of 1 × 10–3, the power penalty of the dual‐hop link with OPC is 2.85 or 2.34 dB lower than that of each polarization without OPC.

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Section: Introductionmentioning

confidence: 99%

Demonstration of an optical phase conjugation based dual‐hop PDM‐QPSK free‐space optical communication link

Chen

Liu

et al. 2022

Electronics Letters

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“…Though a significant success has been achieved, these approaches based on AO technology revealed some limitations, such as application of highly complicated computation and structures, rather moderate response time (its typical value is about 10 -3 -10 -2 sec) and moderate range of spatial frequencies of the distortions (about 200-400 actuators across the adaptive mirror). In comparison, due to the all optical phase conjugation (OPC) techniques, the compensations based on OPC for atmospheric turbulences have much shorter response time (10 -9 -10 -7 sec) and less limitations of the affordable spatial frequencies [14]. The aberration influence imposed on the forward beam that passes through the atmospheric turbulence can be automatically removed for the backward OPC beam that passes through the same one.…”

Section: Introductionmentioning

confidence: 99%

Free-Space Communication Turbulence Compensation by Optical Phase Conjugation

et al. 2020

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A new scheme is proposed to mitigate the atmospheric turbulence effect in coherent free-space optical (FSO) communications by employing optical phase conjugation (OPC) to compensate the signal distortion. The compensation performance of the dual-hop FSO transmission link is simulated using the phase screen method for quadrature phase-shift keying (QPSK) signals. The results show that the bite error rate (BER) can be effectively reduced and the OPC correction is tightly affected by the OPC receiving aperture in strong turbulence regimes. The dual-hop FSO link with the OPC correction is experimentally demonstrated in a turbulence-tunable atmospheric cell, where the OPC is achieved by using degenerate four-wave mixing (DFWM) in a 110-m-long highly nonlinear fiber. At the BER of × − , the power penalty for dual-hop link with OPC correction decreases about 1.2 dB and 2 dB compared with the single-trip link and the non-compensation dual-hop link. The result demonstrates that the OPC unit can improve the performances of the coherent FSO communication, and it has the potential to be extended to higher-order modulation formats and higher bit rate processing.

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Nonlinear phase-conjugate mirrors for atmospheric distortion compensation

Cited by 2 publications

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Demonstration of an optical phase conjugation based dual‐hop PDM‐QPSK free‐space optical communication link

Demonstration of an optical phase conjugation based dual‐hop PDM‐QPSK free‐space optical communication link

Free-Space Communication Turbulence Compensation by Optical Phase Conjugation

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