64-QAM Self-Coherent Transmission Using Symmetric Silicon Photonic Stokes-Vector Receiver

Ishimura, Shota; Fukui, Taichiro; Tanomura, Ryota; Soma, Go; Nakano, Yoshiaki; Tanemura, Takuo

doi:10.1364/ofc.2022.m4j.6

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…In self-coherent systems, the same laser source is utilized for both the signal and local oscillator (LO) components, eliminating the need for precise wavelength control and enabling uncooled laser operation. 4 This can significantly reduce the system cost compared to conventional coherent systems. However, since the signal and LO components are sent over different fiber channels, it is difficult to precisely adjust the path mismatch between the two paths.…”

Section: Introductionmentioning

confidence: 99%

Integrated polarization tracking and control for enhanced performance in polarization multiplexed self-coherent detection

Thakur,

Atkar,

Singh

et al. 2024

Integrated Optics: Devices, Materials, and Technologies XXVIII

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The construction of optical receivers using heterodyne detection techniques is a significant challenge due to the need for complex and power-intensive DSP approaches. Additionally, it is practically difficult to construct a local oscillator laser at the receiver that has the same frequency as the carrier laser for homodyne detection. Therefore, we propose a polarization multiplexed self-coherent detection method that sends both the message signal and the carrier through the same fiber while utilizing polarization diversity. Quadrature Amplitude Modulation is used for modulating the message signal. The system is capable of transmitting a data rate of 150 Gbps. We demonstrate an integrated polarization stabilizer that consists of cascaded Mach-Zehnder interferometers with a fast-tracking algorithm that can track the polarization of an incoming signal at the receiver and an integrated polarization converter based on Stokes vector that minimizes the effect of mixing of signals of orthogonal polarizations in the optical fiber. The algorithm used to feed the polarization controller can change the polarization of an incoming signal at the receiver to the polarization it had when it left the transmitter. Consequently, reducing the impact of PMD (Polarization mode dispersion) on transmission in fiber.

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Section: Introductionmentioning

confidence: 99%