Pasu Kaewplung

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This paper mathematically analyzes the phase distortion of optical orthogonal frequency division multiplexed (O-OFDM) signal due to fiber dispersion and Kerr effect. The results verified by the computer simulation using OptiSys 5.0 software are in a good agreement with the mathematical analysis result.
In this paper, we propose a FTTx system using an active wavelength selective switch (WSS) incorporated with a dynamic wavelength and bandwidth allocation (DWBA) in order to improve the efficiency in bandwidth consumption of the FTTx based on wavelength division multiplexed passive optical network (WDM-PON). Under the control by DWBA, appropriate numbers of(More)
This is the first report showing the simultaneous bandwidth-shift-free phase conjugation with Q factor larger than 7, of 15×10 Gb/s WDM signal on 11.15-nm bandwidth located from 1539.77 to 1550.92 nm, using the optimal designed Sagnac based optical phase conjugator constructed by the 120-m-long highly-nonlinear photonic crystal fiber.
The first wavelength-shift-free phase-conjugated WDM transmission is numerically demonstrated by the transmission of 15×10 Gbps WDM signal on 1539.77–1550.92 nm over 900 km with Q factor larger than 7 using 2 bandwidth-shift-free Sagnac-based optical phase conjugators constructed by 120-m-long highly-nonlinear photonic crystal fiber (HNL-PCF).
We study, by computer simulation, the possibility of employing the optical code-division multiple access (OCDMA) on passive optical network (PON). When the data rate per subscriber is 1.25 Gbps, we demonstrate that the bit error rate smaller than 10−9 at the distance of 20 km is achieved for 4 and 8 subscribers with inline dispersion compensation.