Chirp-aided power fading mitigation for upstream 100 km full-range long reach PON with DBR DML

Zhang, Kuo; He, Hao; Xin, Haiyun; Hu, Weisheng; Liu, Song; Lu, Dan; Zhao, Lingjuan

doi:10.1016/j.optcom.2017.09.011

Cited by 16 publications

(5 citation statements)

References 19 publications

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“…However, if the fiber can generate negative dispersion at the transmission window, the transmission performance will be better than chirp-free case and long-reach transmission based on DML can be achieved [15]. Optical fiber transmission system frequency response transfer function based on DMLs can be expressed as [16]- [18],…”

Section: Principlementioning

confidence: 99%

4 × 25-Gb/s NRZ-OOK Signals Transmission Over a 160-km Single-Mode Fiber Using 10G-Class DML and Photodiode

Xue

2018

IEEE Photonics J.

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In this paper, we have experimentally demonstrated the C-band 4 × 25-Gb/s nonreturn-to-zero ON-OFF-keying (NRZ-OOK) signals over a 160-km single-mode fiber transmission based on 10G-class directly-modulated lasers and photodiodes. The excessive negative dispersion at the receiver side is used to equalize the frequency response of bandwidthlimited directly-modulated signal, therefore enables 25-Gb/s NRZ-OOK transmission based on 10G-class optical devices. By employing a multichannel chromatic dispersion compensation module in the receiver, a single optical device can be used to equalize the frequency response of multiple channels realizing low-cost and high-capacity signal transmission. The results shown in this paper reveal that our proposed scheme would be a promising candidate for a low-cost transition to 100 Gb/s (4 × 25 Gb/s) for the point-to-point metro network applications.

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Section: Principlementioning

confidence: 99%

4 × 25-Gb/s NRZ-OOK Signals Transmission Over a 160-km Single-Mode Fiber Using 10G-Class DML and Photodiode

Xue

2018

IEEE Photonics J.

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“…With the deployment of the fifth generation of mobile networks (5G), in the next few years, the demand for optical devices in 5G networks will mainly include three aspects: huge data throughput by optical devices, a wider operating temperature range, and low cost [1][2][3][4][5][6]. Directly modulated lasers and modules with 25 and 100 Gb/s data transmission characteristics will become the mainstream optical transmitters.…”

Section: Introductionmentioning

confidence: 99%

25 Gb/s Data Transmission Using a Directly Modulated InGaAlAs DBR Laser over 14 nm Wavelength Tuning Range

Zhou

et al. 2021

Photonics

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With the deployment of the fifth generation of mobile networks (5G), 25 and 100 Gb/s directly modulated lasers and modules will become the mainstream optical transmitters. A directly modulated InGaAlAs/InP distributed Bragg reflector (DBR) laser is fabricated by butt-joint technology. A 25 Gb/s data transmission over a single-mode fiber of up to 10 km is demonstrated, and a wavelength tuning range of 14.28 nm is achieved through injection current tuning of a DBR section and temperature control of a thermoelectric cooler (TEC), which is the best candidate of colorless light sources for wavelength-division-multiplexed passive optical network (WDM-PON) systems.

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“…However, DML suffers from frequency chirp, consisting of adiabatic chirp and transient chirp. When a DML is biased at high current, the adiabatic chirp is dominant [5], [6]. In that case, different intensity levels of PAM signal correspond to different frequency offsets and accordingly transmit at different velocities through a dispersive fiber.…”

Section: Introductionmentioning

confidence: 99%

“…The corresponding ERs are 2.8 dB, 3.6 dB, 4.4 dB, 5.2 dB, 5.6 dB, 6.2 dB, 6.9 dB for the 56 Gb/s PAM-4 signal and 2.4 dB, 3.1 dB, 3.6 dB, 4.2 dB, 4.5 dB, 5.4 dB, 5.7 dB for the 84 Gb/s PAM-4 signal. When the DML is operating at a high bias current, the adiabatic chirp induced adiabatic fading can effectively compensate the first transient fading notch, thereby adiabatic fading is dominant[5]. The PWL equalizer is quite effective for the adiabatic chirp dominant case.…”

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confidence: 99%

Piecewise Linear Equalizer for DML Based PAM-4 Signal Transmission Over a Dispersion Uncompensated Link

Kong

Xin

et al. 2020

J. Lightwave Technol.

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Directly modulated laser (DML) and direct detection (DD) based pulse-amplitude modulation (PAM) for short reach optical communications has attracted lots of research interests due to its low cost and simple configuration. However, the directly modulated PAM signal usually suffers from distortions after the transmission over a dispersion uncompensated link. Due to the adiabatic chirp of the DML working in a high output power region, different intensity levels of the PAM signal correspond to different frequency offsets, thus resulting in amplitude-dependent skew after the transmission over a dispersion uncompensated link. It will degrade signal quality and limit transmission distance. In this paper, we, for the first time, propose a computational efficient piecewise linear (PWL) equalizer to correct the amplitude-dependent skew due to the interaction between the DML chirp and chromatic dispersion in the fiber. By using the PWL equalizer, the amplitude-dependent skew is corrected, and we successfully transmit 56 Gb/s PAM-4 signal over 40 km and 84 Gb/s PAM-4 signal over 20 km dispersion uncompensated link in the C band, with a bit error ratio (BER) below the HD-FEC threshold (3.8×10 -3 ). To demonstrate the low computational complexity of the PWL, we compare its complexity with 2 nd order Volterra equalizer for a similar BER performance. The results show that the computational complexity can be reduced by 61.4% and 40.4% for the 56 Gb/s and 84 Gb/s PAM-4 signal transmission, respectively.

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Chirp-aided power fading mitigation for upstream 100 km full-range long reach PON with DBR DML

Cited by 16 publications

References 19 publications

4 × 25-Gb/s NRZ-OOK Signals Transmission Over a 160-km Single-Mode Fiber Using 10G-Class DML and Photodiode

4 × 25-Gb/s NRZ-OOK Signals Transmission Over a 160-km Single-Mode Fiber Using 10G-Class DML and Photodiode

25 Gb/s Data Transmission Using a Directly Modulated InGaAlAs DBR Laser over 14 nm Wavelength Tuning Range

Piecewise Linear Equalizer for DML Based PAM-4 Signal Transmission Over a Dispersion Uncompensated Link

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