WDM Orthogonal Subcarrier Multiplexing Based on Mode-Locked Lasers

Gutiérrez, Félix; Martin, Eamonn P.; Perry, Philip; Ellis, A.D.; Anthur, Aravind P.; Panapakkam, Vivek; Gaimard, Quentin; Merghem, K.; Lelarge, F.; Ramdane, A.; Barry, Liam P.

doi:10.1109/jlt.2017.2706725

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…An additional gap of 20 sub-carriers is introduced next to the optical carrier, keeping the signal out of the region most affected by sub-carrier interference [29]. In a link scenario including semiconductor MLLs, for example, this gap would prove doubly beneficial, since it also offsets the signal spectrum away from the low frequency region where laser RIN dominates [30] and SOA induced signal distortion is the worst [31]. The guard band is followed by 100 sub-carriers, each loaded with randomly generated quadrature phase shift keyed (QPSK) symbols.…”

Section: A Measurement Setupmentioning

confidence: 99%

Laser Phase Noise in Ring Resonator Assisted Direct Detection Data Transmission

Nojić

Tabatabaei-Mashayekh

Rahman

et al. 2021

IEEE J. Select. Topics Quantum Electron.

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We introduce an analytical model describing the statistical and spectral properties of laser phase noise induced intensity noise in ring-resonator-based modulation. The model is validated with single sideband orthogonal frequency division multiplexing (SSB-OFDM) implemented with a silicon photonics resonantly-assisted Mach-Zehnder modulator (RA-MZM). Excellent agreement of experimental data with full link simulations, in which phase noise conversion is treated with the analytical model, confirms its validity. Moreover, we demonstrate 30 Gb/s raw data rate transmission with SSB-OFDM over 20 km of single-mode fiber with a bit error ratio below the 20% forward error correction (FEC) limit for three independently run channels of the RA-MZM, each supplied with off-the-shelf 1 MHz linewidth distributed feedback lasers.

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Section: A Measurement Setupmentioning

confidence: 99%

Laser Phase Noise in Ring Resonator Assisted Direct Detection Data Transmission

Nojić

Tabatabaei-Mashayekh

Rahman

et al. 2021

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

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Narrow linewidth optical frequency comb based on a directly modulated microcavity laser with optical feedback

et al. 2023

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A narrow linewidth optical frequency comb (OFC) based on a directly modulated microcavity laser with external optical feedback is investigated numerically and demonstrated experimentally. Based on the numerical simulations with rate equations, the evolution of the optical and electrical spectra is presented for the direct-modulated microcavity laser with increased feedback strength, and the linewidth property is improved at suitable feedback conditions. The simulation results also show good robustness for the generated OFC in terms of feedback strength and phase. Moreover, the OFC generation experiment is performed by combining with the dual-loop feedback structure to suppress the side mode, and an OFC with a side-mode suppression ratio of 31 dB is realized. Thanks to the high electro-optical response of the microcavity laser, a 15-tone OFC with a frequency interval of 10 GHz is obtained. Finally, the linewidth of each comb tooth is measured to be around 7 kHz under the feedback power of 47 µW, which indicates an enormous compression of approximately 2000 times compared with the free-running continuous-wave microcavity laser.

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WDM Orthogonal Subcarrier Multiplexing Based on Mode-Locked Lasers

Cited by 2 publications

References 28 publications

Laser Phase Noise in Ring Resonator Assisted Direct Detection Data Transmission

Laser Phase Noise in Ring Resonator Assisted Direct Detection Data Transmission

Narrow linewidth optical frequency comb based on a directly modulated microcavity laser with optical feedback

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