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Proceedings Paper

Optical phase transmultiplexing to support traffic grooming in transparent optical networks
Author(s): Guo-Wei Lu
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Paper Abstract

Advanced phase modulation formats, such as differential binary phase-shift keying (DPSK), differential quadrature phase-shift keying (DQPSK), and differential eight-ary phase-shift keying (D8PSK), and so on, have attracted considerable research attention as promising candidates for future optical communication systems. To accommodate different requirements such as nonlinear and dispersion tolerance, implementation complexity or spectral efficiency in different regions of networks, several different modulation formats are expected to coexist in the future optical network. For example, low-speed binary modulation formats may be deployed in the edge networks such as metro or access networks, whereas high-speed or multi-level modulation formats are preferred to be employed at the core networks to support high-speed long-haul transmission. To support the transparent cross-connection among various networks, and the traffic grooming from low-speed edge networks to high-speed core networks, optical phase transmultiplexing technology is highly desirable. In this paper, we report an all-optical phase interleaving technology to phase-multiplex 3x10-Gb/s differential phase-shift keying (DPSK) wavelength-division multiplexing (WDM) signals to a single 30-Gb/s DPSK, and an optical phase-modulated format conversion scheme to convert 2x10-Gb/s DPSK WDM to a single quadrature 20-Gb/s differential quadrature phase-shift keying (DQPSK). The proposed schemes are based on four-wave mixing effect in highly-nonlinear fiber. Different from conventional optical signal processing schemes, the proposed schemes are achieved in optical phase domain directly. Experiments were performed to verify the feasibility of the proposed schemes. Both of them could be applied in transparent optical networks to act as an optical phase transmultiplexer enabling traffic grooming and cross-connection among different networks.

Paper Details

Date Published: 2 November 2009
PDF: 8 pages
Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 75141I (2 November 2009); doi: 10.1117/12.853532
Show Author Affiliations
Guo-Wei Lu, National Institute of Information and Communications Technology (Japan)


Published in SPIE Proceedings Vol. 7514:
Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors
Dieter Stefan Jäger; Hequan Wu; Shuisheng Jian; Desheng Jiang; Deming Liu; Weiwei Dong; Qizhen Sun; Xiaochun Xiao, Editor(s)

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