A novel orthogonal modulation format of D8PSK/ASK with differential bi-phase encoding and its application in a label switching optical network

Zhang, Xing; Zhang, Xiaolei; Wang, Yongjun; Xin, Xiangjun; Yin, Xiaoli; Li, Ling; Zhao, Jijun

doi:10.1007/s11801-012-1121-4

Cited by 10 publications

(3 citation statements)

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“…3 Among these OLS methods, orthogonal modulation is widely applied. [4][5][6][7][8][9][10][11][12][13] Orthogonal modulation superimposes a nonamplitude-modulated signal on an amplitude shift keying (ASK) signal. As the label applies nonamplitude-modulation, it could be superimposed on the payload without extra bandwidth resource, for example, extra time slots or wavelength channels.…”

Section: Introductionmentioning

confidence: 99%

“…Besides the crosstalk reduction, PPM provides high tolerance to dispersion. 14 The nonamplitude modulation applied in OLS includes frequency shift keying (FSK), 4,5 differential phase shift keying (DPSK) [6][7][8][9][10][11][12] and polarization shift keying (PolSK). 13 As PolSK is sensitive to the polarization rotation and FSK occupies more wavelength resource and suffers more dispersion, DPSK is mostly applied among the three modulations.…”

Section: Introductionmentioning

confidence: 99%

“…OLS recently attracts much attention and many schemes of OLS have been proposed, which are summarized and compared in 3 . Among these OLS methods, orthogonal modulation is widely applied 4‐13 . Orthogonal modulation superimposes a nonamplitude‐modulated signal on an amplitude shift keying (ASK) signal.…”

Section: Introductionmentioning

confidence: 99%

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DPSK over inverse pulse position modulation with high extinction ratio for optical label switching

Lü

et al. 2020

Micro & Optical Tech Letters

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Optical label switching (OLS) is a promising solution for rapidly growing packet based internet traffic and data switching in data center. Most proposed schemes apply orthogonal modulation, which superimpose a nonamplitude modulated label signal onto a Manchester coded or pulse position modulated (PPM) ASK payload signal. The extinction ratio (ER) has to be reduced for overlaid signal. To avoid the quality degradation of payload signal from low ER, a differential phase shift keying (DPSK) over inverse PPM is proposed in this paper. Due to the high mark ratio of the inverse PPM, the proposed DPSK over inverse PPM modulation achieves a high ER for the ASK signal while induces limited crosstalk to the DPSK signal. Compare with the previously proposed schemes, the test results show the proposed DPSK over inverse 4PPM modulation achieves an optimum ER improvement of at least 6 dB to support an extended of at least 10.5 km.

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