400GBASE-LR4 and 400GBASE-LR8 Transmission Reach Maximization Using Bismuth-Doped Fiber Amplifiers

Wakayama, Yuta; Elson, Daniel J.; Mikhailov, V.; Maneekut, Rachata; Luo, Juan; Yoshikane, Noboru; Inniss, Daryl; Tsuritani, Takehiro

doi:10.1109/jlt.2023.3269536

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…6 with the maximum achievable OSNR around 30 dB. The average OSNR after fiber transmission was shown to corroborate with the experimental results in [30]. The individual BER versus ROP and OSNR also showed that the system performance was strongly dependent on CD and the signal at 1274 nm was the performance limiting wavelength due to the largest amount of CD.…”

Section: A 400gbase-lr8 Reach Extension Using Multi-span Fiber Transm...supporting

confidence: 81%

“…The work in [30] has shown the experimental setup of 400GBASE-LR8 transceivers with 3 spans of fibers and BDFAs. The average symbol error rate (SER) of all 8 channels below HD-FEC, obtained from a 400GbE tester, was reported.…”

Section: A 400gbase-lr8 Reach Extension Using Multi-span Fiber Transm...mentioning

confidence: 99%

“…Several works have also shown the progress using BDFA with customized transmitters/receivers (Tx/Rx) using 25 Gbaud PAM-4 signals to increase the single-span distance [27]- [29]. On the contrary, the multi-span transmission with BDFAs as inline amplifiers has successfully demonstrated with 400GBASE-LR8 modules with the distance of 90 km [30]. Other multi-span transmission work with BDFA was experimentally conducted in [31] and [32] by using an optical re-circulating loop with Nyquist on-off keying (OOK) and Kramers-Kronig detection-assisted singlesideband quadrature phase-shift keying (KK-SSB-QPSK).…”

Section: Introductionmentioning

confidence: 99%

“…If a system has been loss managed by the use of OAs, CD becomes the dominant distortion that restricts the system's transmission reach [28], [30]. Although the value of dispersion in the O-band is relatively low compared to the Cband, the accumulating effects of CD after a sufficiently long distance can cause destructive power fading in IM/DD systems [35].…”

Section: Introductionmentioning

confidence: 99%

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Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

Maneekut,

Elson,

Wakayama

et al. 2024

IEEE Access

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This paper explores, through the utilization of analytical models and simulations, the bit error rate (BER) of 400GBASE-LR8/ER8 in back-to-back configuration, considering various extinction ratio (ER) values and photodetector types. Simulation of transmission over fiber is carried out to measure chromatic dispersion (CD) penalty in each scenario. To increase the distance, we simulated a multi-span transmission with inline optical amplifiers (OAs). We mitigated the effects of CD-induced power fading by employing equalization such that the channel under test (CUT) at 1274 nm could reach 7×30 km. The effects of fiber nonlinearity were also investigated for both single-channel and 3 wavelength division multiplexing (WDM) at various channel spacings. Moreover, the relationship between ER and peak-to-average-power ratio (PAPR) at different distances was investigated. An ER optimization for a highly accumulated CD multi-span fiber link with amplification was effective in improving the BER. Finally, we successfully transmitted a 26.56 GBaud 4-level pulse amplitude modulation (PAM-4) signal up to 8×30 km with the optimal ER of 5 dB.

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Section: A 400gbase-lr8 Reach Extension Using Multi-span Fiber Transm...supporting

confidence: 81%

Section: A 400gbase-lr8 Reach Extension Using Multi-span Fiber Transm...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

Maneekut,

Elson,

Wakayama

et al. 2024

IEEE Access

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E-band telecom-compatible 40 dB gain high-power bismuth-doped fiber amplifier with record power conversion efficiency

Donodin,

Manuylovich,

Dvoyrin

et al. 2024

APL Photonics

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Multi-band transmission is one of the key practical solutions to cope with the continuously growing demand on the capacity of optical communication networks without changing the huge existing fiber base. However, ultra-broadband communication requires the development of novel power efficient optical amplifiers operating beyond C- and L-bands, and this is a major research and technical challenge comparable to the introduction of the seminal erbium-doped fiber amplifiers that dramatically changed the optical communication sector. There are several types of optical fibers operating beyond C- and L-bands that can be used for the development of such amplifiers, specifically the fibers doped with neodymium, praseodymium, thulium, and bismuth. However, among these, Bi-doped fibers are of special interest as the most promising amplification medium because, unlike the others, different Bi-associated active centers allow amplification in an enormous band of overall width of 700 nm (1100–1800 nm). Such spectral coverage can be obtained by using different host materials, such as aluminosilicate, phosphosilicate, silica, and germanosilicate glasses. Here, we report a novel Bi-doped fiber amplifier with record characteristics for E-band amplification, including the highest power conversion efficiency among telecom-compatible E-band amplifiers reported to date. This bismuth-doped fiber amplifier (BDFA) features a maximum gain of 39.8 dB and a minimal noise figure of 4.6 dB enabled by 173 m Bi-doped fiber length. The maximum achieved power conversion efficiency of 38% is higher than that of L-band Er-doped fiber amplifiers. This performance demonstrates the high potential of BDFA for becoming the amplifier of choice in modern multi-band optical communication networks.

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All-Optical Time-Extended OCDM-PAM4 for 200 Gbps/λ O-Band Multi-Span Transmission

Maneekut,

Elson,

Wakayama

et al. 2024

IEEE Access

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400GBASE-LR4 and 400GBASE-LR8 Transmission Reach Maximization Using Bismuth-Doped Fiber Amplifiers

Cited by 11 publications

References 15 publications

Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

E-band telecom-compatible 40 dB gain high-power bismuth-doped fiber amplifier with record power conversion efficiency

All-Optical Time-Extended OCDM-PAM4 for 200 Gbps/λ O-Band Multi-Span Transmission

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