Feasibility of 40-Gbps RZ-DQPSK signal transmission over PON

Ket-Urai, Varaporn; Maneekut, Rachata; Kaewplung, Pasu

doi:10.1109/oecc.2012.6276705

Cited by 2 publications

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“…DQPSK can also perform well at 40 Gbps. Its main limit factor at this speed is CD [8]. Results in [9] show that RZ-DQPSK enables the longest optical reach, NRZ-DQPSK has the largest dispersion tolerance, and RZ-DPSK offers the largest nonlinearity tolerance for a single 160 Gbps channel and different dispersion compensation schemes.…”

Section: Icton 2015mentioning

confidence: 99%

System improvements in dense wavelength division multiplexing networks by using advanced optical modulation formats

Agalliu

Lucki

2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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In this paper we focus on modulation formats for optical transmission networks. The most widely used intensity formats such as Non Return to Zero, Return to Zero, Carrier-Suppressed Return to Zero and duobinary are investigated in terms of bit error rate, Q-factor, optical reach and dense wavelength division multiplexing grid, in order to find out their physical limitations and system performance in a transmission system with given parameters. However, phase-based modulation formats like Differential Phase-Shift Keying and Differential Quadrature Phase-Shift Keying can perform better at the cost of increased transceiver's complexity. Some formats can benefit from polarization division multiplexing to enable higher spectral efficiency, optical reaches, optical to signal noise ratio and chromatic dispersion tolerances. Simulations are performed in OptSim software environment based on the Time Domain Split Step method which uses full band simulation and offers aliasing errors immunity, accurate differential group delays, parallel computing, etc.

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Section: Icton 2015mentioning

confidence: 99%

System improvements in dense wavelength division multiplexing networks by using advanced optical modulation formats

Agalliu

Lucki

2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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“…Gbps with advanced modulation formats over PON research also have been studied [13], [14]. The study of efficient and flexible PON network employing dynamic wavelength allocation (DWA) and using AWGs as a multiplexer at OLT side also has been demonstrated [15].…”

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confidence: 99%

Flexible optical fiber access networks using wavelength selective switches

Htwe

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The optical switching crosstalk is the important considerable issue in the optical fiber communication system, it tends to the signal distortion and decreasing of the system performance. This dissertation research is proposed a guideline to design a flexible fiber to the x (FTTx) system based on wavelength division multiplexing passive optical network (WDM-PON) combining with wavelength selective switches (WSSs). For the system configuration, the 4 wavelengths-10 ONUs system with the data bit rate of 10-Gbps/? and 40-Gbps/ ? are studied in this dissertation. Moreover, to be active switching, the dynamic wavelength bandwidth allocation (DWBA) controller is used to control WSSs. The modulation format NRZ-OOK is applied for 10 Gbps/? system and the advanced modulation format NRZ-DQPSK is applied for 40 Gbps/? system. The investigation of this dissertation is mainly focus on the improvement of system performance such as the minimum received optical power and power budget related with bit error rate(BER). In order to improve the system performance, the signal distortion reduction methodology is applied by adding the proper delay times in switching characteristics of 3 different types of WSS. The results of investigation come from only the computer simulation by using the commercial OptiSystem software without performing real experiments. The maximum reach of data transmission is limited to 20 km over ITU-T G652.D SMF fiber with the limited BER=10?? (without using forward error correction: FEC). As the results based on worst case BER, the received optical power for both system designs are improved after providing proper delay times in switching characteristics of WSS. Obviously, the power budget is improved by about 3 dB after providing 3? delay time of electro-optic switch for both system designs.

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Feasibility of 40-Gbps RZ-DQPSK signal transmission over PON

Cited by 2 publications

References 2 publications

System improvements in dense wavelength division multiplexing networks by using advanced optical modulation formats

System improvements in dense wavelength division multiplexing networks by using advanced optical modulation formats

Flexible optical fiber access networks using wavelength selective switches

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