Associate Professor Pasu Kaewplung, Ph.D.
รศ. ดร.พสุ แก้วปลั่ง
Education
- Ph.D (Electrical Engineering), Chulalongkorn University
Email: Pasu.K@chula.ac.th
Research Interest
- All of telecommunications technologies with no any burdens to realize Digital Eco-System. 5G, Fiber-optics networks, LEO Satellite, AI, Bigdata, etc., whatever you want to conduct your carrier path.
Research Cluster
Link to
1.
Maneekut, R; Kaewplung, P
Noise suppression using amplitude-shaping OCDM with 16-Chip multi-level phase-shifted En/Decoder Journal Article
In: IEEE Access, vol. 6, pp. 50096-50104, 2018, ISSN: 21693536, (cited By 0).
@article{Maneekut2018,
title = {Noise suppression using amplitude-shaping OCDM with 16-Chip multi-level phase-shifted En/Decoder},
author = {R Maneekut and P Kaewplung},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052625238&doi=10.1109%2fACCESS.2018.2867940&partnerID=40&md5=345543064626d6b1db0cfc0e00b66761},
doi = {10.1109/ACCESS.2018.2867940},
issn = {21693536},
year = {2018},
date = {2018-01-01},
journal = {IEEE Access},
volume = {6},
pages = {50096-50104},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {We propose an amplitude-shaping (AS) technique to shape an en/decoded signal in 10-Gb/s coherent time-spreading optical-code division multiplexing (OCDM) with ON- OFF keying modulation format, using 16-chip multi-level phase-shifted keying en/decoders. By employing this technique, the primary beat noise and the multiple access interference can be suppressed, and the code detection performance is improved. The bit error rate and the power penalty of the 8×10 Gb/s AS-OCDM, obtained from the calculation and the simulation, are improved, in comparison with the conventional OCDM system. © 2013 IEEE.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We propose an amplitude-shaping (AS) technique to shape an en/decoded signal in 10-Gb/s coherent time-spreading optical-code division multiplexing (OCDM) with ON- OFF keying modulation format, using 16-chip multi-level phase-shifted keying en/decoders. By employing this technique, the primary beat noise and the multiple access interference can be suppressed, and the code detection performance is improved. The bit error rate and the power penalty of the 8×10 Gb/s AS-OCDM, obtained from the calculation and the simulation, are improved, in comparison with the conventional OCDM system. © 2013 IEEE.
2.
Kaewplung, P; Kikuchi, K
In: Journal of Lightwave Technology, vol. 25, no. 10, pp. 3035-3050, 2007, ISSN: 07338724, (cited By 10).
@article{Kaewplung2007,
title = {Simultaneous cancellation of fiber loss, dispersion, and Kerr effect in ultralong-haul optical fiber transmission by midway optical phase conjugation incorporated with distributed raman amplification},
author = {P Kaewplung and K Kikuchi},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-36348990920&doi=10.1109%2fJLT.2007.903626&partnerID=40&md5=100c8a8e16d18c7901527f23b9f27e3f},
doi = {10.1109/JLT.2007.903626},
issn = {07338724},
year = {2007},
date = {2007-01-01},
journal = {Journal of Lightwave Technology},
volume = {25},
number = {10},
pages = {3035-3050},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {An alternative application of distributed Raman amplification (DRA) for ultralong-haul optical fiber transmission is proposed. In our study, the DRA is employed in a transmission system using midway optical phase conjugation (OPC) for amplifying an optical signal and, at the same time, for constructing signal power evolution, which is symmetrical with respect to the midpoint of the system where the OPC is performed. Then, the nonlinear signal waveform distortions that are caused by the Kerr effect, as well as fiber dispersion, are almost completely compensated by the OPC, whereas the fiber loss is compensated by the DRA. Three possible symmetrical signal power maps-a power map that has a reverse sign of the power map that is caused by lump amplification, a flat signal power map, and an arbitrary symmetrical signal power map-are numerically designed by using appropriate Raman pump powers. We show that the flat power map exhibits smaller difference from the target and a higher optical signal-to-noise ratio and requires lower pump power than the other two power maps. Numerical simulation results demonstrate that, by employing the flat power maps with a span of 40 km, a single-wavelength signal whose data rate is 160 Gb/s can be successfully transmitted over 5000 km, and the Kerr effect is sufficiently suppressed near limitation due to the nonlinear accumulation of noise. Finally, we study the feasibility of expanding our method to wavelength-division-multiplexed signal transmission by designing a DRA gain with multiple-wavelength pumping to simultaneously obtain a flat power map and a wide-and-flat gain bandwidth. By using four-wavelength Raman pumps while carefully choosing pump wavelengths and their powers, we achieve the DRA gain that simultaneously gives a fluctuation of the signal power of only 3.5%, a gain ripple of only 5.3%, and, at the same time, a gain bandwidth of as wide as 46 nm. © 2007 IEEE.},
note = {cited By 10},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
An alternative application of distributed Raman amplification (DRA) for ultralong-haul optical fiber transmission is proposed. In our study, the DRA is employed in a transmission system using midway optical phase conjugation (OPC) for amplifying an optical signal and, at the same time, for constructing signal power evolution, which is symmetrical with respect to the midpoint of the system where the OPC is performed. Then, the nonlinear signal waveform distortions that are caused by the Kerr effect, as well as fiber dispersion, are almost completely compensated by the OPC, whereas the fiber loss is compensated by the DRA. Three possible symmetrical signal power maps-a power map that has a reverse sign of the power map that is caused by lump amplification, a flat signal power map, and an arbitrary symmetrical signal power map-are numerically designed by using appropriate Raman pump powers. We show that the flat power map exhibits smaller difference from the target and a higher optical signal-to-noise ratio and requires lower pump power than the other two power maps. Numerical simulation results demonstrate that, by employing the flat power maps with a span of 40 km, a single-wavelength signal whose data rate is 160 Gb/s can be successfully transmitted over 5000 km, and the Kerr effect is sufficiently suppressed near limitation due to the nonlinear accumulation of noise. Finally, we study the feasibility of expanding our method to wavelength-division-multiplexed signal transmission by designing a DRA gain with multiple-wavelength pumping to simultaneously obtain a flat power map and a wide-and-flat gain bandwidth. By using four-wavelength Raman pumps while carefully choosing pump wavelengths and their powers, we achieve the DRA gain that simultaneously gives a fluctuation of the signal power of only 3.5%, a gain ripple of only 5.3%, and, at the same time, a gain bandwidth of as wide as 46 nm. © 2007 IEEE.
3.
Kaewplung, P; Angkaew, T; Kikuchi, K
In: Journal of Lightwave Technology, vol. 21, no. 6, pp. 1465-1473, 2003, ISSN: 07338724, (cited By 16).
@article{Kaewplung2003,
title = {Simultaneous suppression of third-order dispersion and sideband instability in single-channel optical fiber transmission by midway optical phase conjugation employing higher order dispersion management},
author = {P Kaewplung and T Angkaew and K Kikuchi},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0041418228&doi=10.1109%2fJLT.2003.812462&partnerID=40&md5=6394e75e2fb991c7a3b00ff1f4863a1b},
doi = {10.1109/JLT.2003.812462},
issn = {07338724},
year = {2003},
date = {2003-01-01},
journal = {Journal of Lightwave Technology},
volume = {21},
number = {6},
pages = {1465-1473},
abstract = {In optical phase conjugation (OPC) systems, the third-order dispersion (TOD) of optical fibers and the nonlinear resonance at well-defined signal sideband frequencies called sideband instability (SI) mainly limit the transmission performance. We propose, for the first time, a scheme for simultaneous suppression of both TOD and SI in OPC systems using a periodic higher order dispersion-managed link consisting of standard single-mode fibers (SMFs) and reverse dispersion fibers (RDFs). Computer simulation results demonstrate the possibility of 200-Gb/s data transmission over 10000 km in the higher order dispersion-managed OPC system, where the dispersion map is optimized by our system design strategies.},
note = {cited By 16},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In optical phase conjugation (OPC) systems, the third-order dispersion (TOD) of optical fibers and the nonlinear resonance at well-defined signal sideband frequencies called sideband instability (SI) mainly limit the transmission performance. We propose, for the first time, a scheme for simultaneous suppression of both TOD and SI in OPC systems using a periodic higher order dispersion-managed link consisting of standard single-mode fibers (SMFs) and reverse dispersion fibers (RDFs). Computer simulation results demonstrate the possibility of 200-Gb/s data transmission over 10000 km in the higher order dispersion-managed OPC system, where the dispersion map is optimized by our system design strategies.
4.
Kaewplung, P; Angkaew, T; Kikuchi, K
In: Journal of Lightwave Technology, vol. 20, no. 11, pp. 1895-1907, 2002, ISSN: 07338724, (cited By 14).
@article{Kaewplung2002,
title = {Complete analysis of sideband instability in chain of periodic dispersion-managed fiber link and its effect on higher order dispersion-managed long-haul wavelength-division multiplexed systems},
author = {P Kaewplung and T Angkaew and K Kikuchi},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036875185&doi=10.1109%2fJLT.2002.806365&partnerID=40&md5=e65a676fecc59d379cc4cc3e1d75ccf7},
doi = {10.1109/JLT.2002.806365},
issn = {07338724},
year = {2002},
date = {2002-01-01},
journal = {Journal of Lightwave Technology},
volume = {20},
number = {11},
pages = {1895-1907},
abstract = {We present for the first time a complete theoretical analysis of sideband instability (SI) that occurs when two kinds of fibers with different characteristics are concatenated to form a dispersion-managed fiber link. In the analysis, the following three cases are taken into account: case (a) when a dispersion-management period is larger than an amplification period, case (b) when the two lengths are equivalent, and case (c) when a dispersion-management period is smaller than an amplification period. We find that the SI gain peak appears at frequencies determined by the larger of the two variation periods. Moreover, for all three cases, the magnitude of the SI gain reduces with the increase in strength of dispersion management. Next, we focus on the fiber link using the combination of standard single-mode fiber and reverse dispersion fiber, which is widely used for simultaneously compensating second- and third-order dispersion. By computer simulation, it is shown that in wavelength-division-multiplexed systems, SI still induces significant degradation in channels located at frequencies where SI induced from other channels arises. By reallocating the channel frequency to avoid the SI frequency, the transmission performance is improved significantly.},
note = {cited By 14},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We present for the first time a complete theoretical analysis of sideband instability (SI) that occurs when two kinds of fibers with different characteristics are concatenated to form a dispersion-managed fiber link. In the analysis, the following three cases are taken into account: case (a) when a dispersion-management period is larger than an amplification period, case (b) when the two lengths are equivalent, and case (c) when a dispersion-management period is smaller than an amplification period. We find that the SI gain peak appears at frequencies determined by the larger of the two variation periods. Moreover, for all three cases, the magnitude of the SI gain reduces with the increase in strength of dispersion management. Next, we focus on the fiber link using the combination of standard single-mode fiber and reverse dispersion fiber, which is widely used for simultaneously compensating second- and third-order dispersion. By computer simulation, it is shown that in wavelength-division-multiplexed systems, SI still induces significant degradation in channels located at frequencies where SI induced from other channels arises. By reallocating the channel frequency to avoid the SI frequency, the transmission performance is improved significantly.
5.
Kaewplung, P; Angkaew, T; Kikuchi, K
In: IEEE Photonics Technology Letters, vol. 13, no. 4, pp. 293-295, 2001, ISSN: 10411135, (cited By 7).
@article{Kaewplung2001a,
title = {Feasibility of 100-Gb/s 10000-km single-channel optical transmission by midway optical phase conjugation incorporated with third-order dispersion compensation},
author = {P Kaewplung and T Angkaew and K Kikuchi},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035305138&doi=10.1109%2f68.917829&partnerID=40&md5=333c54a3c0dae3cf2ba90cb413edf8c1},
doi = {10.1109/68.917829},
issn = {10411135},
year = {2001},
date = {2001-01-01},
journal = {IEEE Photonics Technology Letters},
volume = {13},
number = {4},
pages = {293-295},
abstract = {In optical phase conjugation systems, the third-order dispersion of fibers almost linearly accumulates along the transmission distance, and the distortion induced from the third-order dispersion can be perfectly compensated by using a linear third-order dispersion compensator placed at any point of the system. We demonstrate by numerical simulations that 100-Gb/s single-channel transmission can be achieved over a 10,000-km distance in midway optical phase conjugation transmission systems by compensating the third-order dispersion.},
note = {cited By 7},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In optical phase conjugation systems, the third-order dispersion of fibers almost linearly accumulates along the transmission distance, and the distortion induced from the third-order dispersion can be perfectly compensated by using a linear third-order dispersion compensator placed at any point of the system. We demonstrate by numerical simulations that 100-Gb/s single-channel transmission can be achieved over a 10,000-km distance in midway optical phase conjugation transmission systems by compensating the third-order dispersion.