A simplified mode diversity coherent receiver based on non-mode-selective photonic lantern and Kramers-Kronig detection

Qiu, Cong; Ma, Wenqi; Liu, Feng; Hu, Guijun

doi:10.1016/j.optlastec.2023.109229

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…A photonic lantern offers a potentially simpler alternative to the commonly used adaptive optic systems as demonstrated in Refs. [13][14][15][16]. Not only can photonic lanterns transition light from a multi-mode input into a single mode fiber, they also can provide information about the shape of the wavefront [17].…”

Section: Photonic Lanterns For Coherent Modulationmentioning

confidence: 99%

The application of photonic lanterns in free space optical communications

Tedder

2024

Optical Interconnects XXIV

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Photonic lanterns offer an efficient solution to transition distorted light from free space into small aperture or singlemode waveguide devices. As a result, photonic lanterns can be useful for free space optical communications, where light is transmitted across a channel with varying atmospheric conditions. This paper will give an overview of studies using photonic lanterns in photon counting optical communication receivers where the detectors are small in aperture and fiber coupled. This paper will also survey other potential uses of photonic lanterns in coherent optical communication receivers or as wavefront sensors in adaptive optical systems.

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Section: Photonic Lanterns For Coherent Modulationmentioning

confidence: 99%

The application of photonic lanterns in free space optical communications

Tedder

2024

Optical Interconnects XXIV

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“…Note that an alternative to using the coherent receivers is by implementing the direct detectors and signal phase extraction in the digital domain based on the Kramers-Kronig detection technique (that uses the Hilbert transform) [11]. However, the simplicity of using the direct detectors in the Kramers-Kronig receivers versus the ICR's turns to be offset by, first, a more complex DSP algorithm that should implement both the forward and backward Fourier transforms of the log(Power(t)) function to be able to extract the signal phase vs time, which imposes more burden on the DSP resource utilization and, second, by inevitability of using a narrow linewidth LO to create the minimum phase signal [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of coherent receiver with photonic lantern and digital signal processing

Yevick,

Bayne,

Garcia

et al. 2024

Free-Space Laser Communications XXXVI

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In free-space optical communications in which the signal is coupled into a single-mode fiber, atmospheric distortion leads to loss of signal and reduced receiver sensitivity. We demonstrate a coherent receiver system in which a dual polarization quadrature phase shift-keying (DP-QPSK) signal is coupled into a photonic lantern, which efficiently separates the light from a large multimode core into single mode fibers. Outputs from the lantern are passed to off-the-shelf integrated coherent receivers and digitized, and the resulting signals are coherently combined with optimal weight coefficients. The reconstructed signal exhibits reduced sensitivity to atmospheric distortion and demonstrates improved performance.

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Satellite-to-ground optical downlink model using mode mismatching multi-mode photonic lanterns

Guo,

Li,

Chen

et al. 2023

Opt. Express

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Photonics lanterns (PLs) provide an effective mode diversity solution to mitigate atmospheric turbulence interference in free-space optical communications (FSOC). This paper presents mode-mismatching multimode photonic lanterns (MM-PLs) for diversity receiver in satellite-to-ground downlink scenarios. Our study evaluates the coupling characteristics of the mode-selective PLs (MSPLs) and non-mode-selective PLs (NSPLs) for the influence of strong-to-weak turbulence and confirms that MSPLs outperform NSPLs under weak turbulence conditions. The research further explores the impact of fiber position error (FPE) on the spatial light-to-fiber coupling, including the optimal focal length deviation and lateral offset of receiving fiber devices. We have calculated and compared the coupling power and signal-to-noise ratio (SNR) of few-mode PLs (FM-PLs) and MM-PLs for various turbulence intensities. The results indicate that the optimal focal length tolerance, which corresponds to a decrease of approximately 1 dB in the average coupling power, is 2-3 m and 5-6 m for FM-PLs and MM-PLs, respectively. Furthermore, regardless of whether it is strong or weak turbulence, MM-PL exhibits a lateral offset tolerance exceeding 12 µm for a 0.5 dB drop in the mean coupled power, whereas the lateral offset tolerance of FM-PL is only 3 µm under weak turbulence. Additionally, the decrease in the average SNR of MM-PLs is gentle, only 0.67-1.16 dB at a 12 µm offset under weak turbulence, whereas there is a significant reduction of 6.50-8.49 dB in the average SNR of FM-PLs. These findings demonstrate the superiority of MM-PLs over FM-PLs in turbulence resistance and fiber position tolerance in the satellite-ground downlink.

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A simplified mode diversity coherent receiver based on non-mode-selective photonic lantern and Kramers-Kronig detection

Cited by 4 publications

References 17 publications

The application of photonic lanterns in free space optical communications

The application of photonic lanterns in free space optical communications

Experimental demonstration of coherent receiver with photonic lantern and digital signal processing

Satellite-to-ground optical downlink model using mode mismatching multi-mode photonic lanterns

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