Dispersion penalty for 1.3 mu m lightwave systems with multimode semiconductor lasers

Agrawal, Govind P.; Anthony, P. J.; Shen, T. M.

doi:10.1109/50.4046

Cited by 64 publications

(8 citation statements)

References 8 publications

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“…21 On the other hand, the laser fluctuations are likely amplified either intrinsically by mode competition phenomena 22 or extrinsically due to external optical feedback, 23 which enhances the TOJ and BER. 11,12,24 Therefore, modeling of laser fluctuations and evaluation of the TOJ are essential to understand the laser behavior and estimate its digital modulation performance.…”

Section: Introductionmentioning

confidence: 99%

Analysis of semiconductor laser dynamics under gigabit rate modulation

Ahmed

Yamada

Mahmoud

2007

Journal of Applied Physics

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A theoretical study of the dynamics of semiconductor lasers subjected to pseudorandom digital modulation at gigabit rates is presented. The eye diagram, turn-on jitter ͑TOJ͒, and power fluctuations in the modulated laser wave form are analyzed. The study is based on numerical large-signal analysis of the laser rate equations. Influences of the biasing and modulation currents on the eye diagram and TOJ are examined. The degree of eye opening is measured in terms of a Q factor of the laser signal analogous to the Q factor determining the bit-error rate in transmission systems. Influence of optimizing both the sampling and decision times on the signal Q factor is modeled. We show that the most eye opening corresponds to shortening the sampling time associated with lengthening the decision time. We also assess the relative contributions of the laser intrinsic noise and pseudorandom bit pattern to the TOJ. The results show that the bit pattern is the major contributor to the TOJ when the setting time of the relaxation oscillation is longer than the bit slot.

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Section: Introductionmentioning

confidence: 99%

Analysis of semiconductor laser dynamics under gigabit rate modulation

Ahmed

Yamada

Mahmoud

2007

Journal of Applied Physics

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“…According to the statistical analysis of MPN presented in [17,18], MPN penalty in nearly single-mode lasers will lead to independent (random) errors. We can then use (2), (3), and (5) to estimate the theoretical bound when RS(255, 239) codes are employed to correct for the power penalty introduced by the MPN in the channel.…”

Section: Mode-partition Noise Analysismentioning

confidence: 99%

“…Consequently, a power penalty must be paid to improve the SNR to the same value that is necessary to achieve the required BER. The power penalty caused by MPN existing in 1330 nm lightwave systems has been analyzed in [18].…”

Section: Mode-partition Noise Analysismentioning

confidence: 99%

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Performance analysis of burst-mode receivers with clock phase alignment and forward error correction for GPON

Shastri

Faucher²,

Kheder

et al. 2008

Analog Integr Circ Sig Process

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We experimentally demonstrate the performance analysis of burst-mode receivers (BMRx) in a 622 Mb/s 20-km gigabit-capable passive optical network (GPON) uplink. Our receiver features automatic phase acquisition using a clock phase aligner (CPA), and forward-error correction using (255, 239) Reed-Solomon (RS) codes. The BMRx provides instantaneous (0 preamble bit) phase acquisition and a packet-loss ratio (PLR) \ 10 -6 for any phase step (±2p rads) between consecutive packets, while also supporting more than 600 consecutive identical digits (CIDs). The receiver also accomplishes a 3-dB coding gain at a bit-error rate (BER) of 10 -10 . The CPA makes use of a phase picking algorithm and an oversampling clock-and-data recovery circuit operated at 29 the bit rate. The receiver meets the GPON physical media dependent layer specifications defined in the ITU-T recommendation G.984.2 standard. We investigate the PLR performance of the system and quantify it as a function of the phase step between consecutive packets, received signal power, CID immunity, and BER, while also assessing the tradeoffs in preamble length, power penalty, and pattern correlator error resistance. We also study the impact of mode-partition noise in the GPON uplink in terms of the effective PLR and BER coding gain performance of the system. In addition, we demonstrate how the CPA and the RS(255, 239) codes can be used in tandem for dynamic burst-error correction giving reliable BERs in bursty channels.

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“…While the burst-mode nature changes the bit-error distribution in a GPON uplink, the MPN changes the slope of the BER curve. According to the accepted MPN descriptions in [9], the MPN can be characterized as additional receiver noise with a properly defined variance , which is determined by [9] (1)…”

Section: Simulationsmentioning

confidence: 99%