Transfer Matrix Characterization and Mode-Dependent Loss Optimization of Packaged 7-Core Coupled-Core EDFA

Mazur, Mikael; Fontaine, Nicolas K.; Ryf, Roland; Chen, Haoshuo; Dallachiesa, Lauren; Ohtsuka, T.; Sakuma, Hirotaka; Hayashi, Tetsuya; Hasegawa, Takemi; Tazawa, Hidehisa; Neilson, David T.

doi:10.1109/ecoc52684.2021.9605897

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Fig. 20 shows the measured results of a packaged randomly-coupled seven-core EDFA, which achieves less than 3-dB P-P MDL (estimated to be <1-dB rms MDL) while offering more than 25-dB gain [95]. The MDL suppression of multi-core EDFA is a remaining challenge for realizing long-haul all MCF transmission links [25], [96], but the MDL caused by multi-core EDFAs is expected to be further suppressed by the MDL suppression of coupling subcomponents and optimizing the coupling strength among the cores.…”

Section: C O U P L E D M U L T I -C O R E a M P L I F I E R Smentioning

confidence: 99%

Randomly-Coupled Multi-Core Fiber Technology

et al. 2022

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| Randomly-coupled multi-core fiber (MCF) technology has come to attract lots of attention because of its strong applicability to long-haul transmission systems. Compared with weakly-coupled MCFs with independent cores, it can simultaneously realize higher spatial channel density and ultralow transmission loss using existing ultralow-loss single-mode fiber (SMF) core designs. The strong mode coupling characteristics of randomly-coupled MCFs can provide favorable optical properties, such as suppressed accumulation of modal dispersion (MD), mode-dependent loss (MDL), and nonlinear impairments. This article gives an overview of randomly-coupled MCF technology advancements. First, we describe the classification and design of randomly-coupled MCFs and explain what the randomly-coupled MCFs are and how they are designed. State-of-the-art randomly-coupled MCFs can accommodate four, seven, or 12 cores in a standard 125-µm cladding while achieving ultralow transmission loss and/or small MD, which are very promising for long-haul transmission media. Next, we present the methods to characterize the optical properties of randomly-coupled MCFs and the difference compared to conventional SMF measurements. We also show the low-loss low-MDL connectivity of Manuscript

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Section: C O U P L E D M U L T I -C O R E a M P L I F I E R Smentioning

confidence: 99%

Randomly-Coupled Multi-Core Fiber Technology

et al. 2022

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“…The transfer matrices of different 4CFs and the matched fanin and fan-outs (FIFOs) were measured using SWI, which has been commonly used to characterize space-divisionmultiplexing components and systems [27], [28]. The experiment setup is shown in Fig.…”

Section: Characteristics Of Transfer Matrixmentioning

confidence: 99%

Study on Characteristics of Coupled-Core Four-Core Fibers With Different Core Pitches

Xiong,

Ma,

Chang

et al. 2024

IEEE Photonics J.

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We studied the characteristics of coupled-core fourcore fibers (CC-4CFs) with different core pitches both theoretically and experimentally. The spatial mode dispersions of different fibers were analyzed, and the result agrees well with theoretical ones. In the experiment, we achieved a spatial mode dispersion as low as 3.72 ps/km 1/2 for a 4 km-long CC-4CF with core pitch of 19 μm at a bending radius of 8 cm. The impulse response matrices of four core fibers with different core pitches was investigated using swept-wavelength interferometry over 100 nm bandwidth. The impulse responses were Gaussian-shaped and consistent between different inputs and outputs for CC-4CFs. Our results show that the CC-4CFs with core pitches of 17 and 19 μm exhibit narrower pulse broadening. In addition, the modedependent losses of different fibers were analyzed. For the fibers with core pitch of 19 μm, the estimated mode-dependent loss was lower than 3 dB for the entire 100 nm bandwidth. Our results are especially helpful for developing coupled-core multicore fibers for long-haul transmission applications.

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