Nonlinear threshold of RZ-DBPSK and RZ-DQPSK

Fischer, Johannes; Petermann, K.

doi:10.1109/ecoc.2008.4729505

Cited by 2 publications

(1 citation statement)

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“…The phase modulator works as a data modulator driven by the incoming electrical data stream. The optical channel power into the fiber launch point is set to 0 dBm (1 mW) to balance between providing a sufficient OSNR and reducing the impact of the nonlinear effect to achieve optimum BER performance [34,35]. Figure 7 shows a schematic diagram of the simulation setup for the ultra-long span transmission system, which was configured without an active repeater or optical line amplifier (OLA) component along the 390-km transmission link.…”

Section: Simulation Model Of Dqpsk Modulated Data Transmissionmentioning

confidence: 99%

Modeling of Ultra-Long Span Bidirectional Raman Transmission Link Using Three-Segment Hybrid Fiber Core Structure

2018

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Ultra-long span unrepeatered systems using distributed Raman amplification are cost-effective solutions for bridging moderate transmission distances. However, there are two major limiting factors: nonlinear Kerr effect-induced nonlinear signal distortion and optical signal-to-noise ratio degradation due to spontaneous Raman noise. In this report, we proposed a model of three-segment hybrid fiber effective core area structure and developed a model covering: (1) generalized mathematical formulations, (2) analysis of three-segment Raman amplified link, and (3) simulation model of data transmission. The proposed model showed an improvement of the Raman gain profile, a reduction of the negative impact of the nonlinear Kerr effect, and an enhancement of the optical signal-to-noise ratio. A numerical simulation of the transmission performance of the three-segment hybrid structure was compared to conventional single-segment single fiber core structure on 80 Gb/s differential quadrature phase-shift keying (DQPSK) modulated data signals over a propagation distance of 390 km. The required optical signal-to-noise ratio was reduced by 2.71 dB to achieve the target error rate without using forward error correction. The numerical model and simulation of various data rates up to 100 Gb/s consistently showed that an improvement in transmission performance could be achieved by using three-segment hybrid fiber effective core area structure.

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Section: Simulation Model Of Dqpsk Modulated Data Transmissionmentioning

confidence: 99%