Recovery of 40 GHz optical clock from 160 Gbit/s data using regeneratively modelocked semiconductor laser

Ohno, Takao; Sato, K.; Shimizu, Tomoya; Furuta, Tadaomi; Itô, Hisashi

doi:10.1049/el:20030303

Cited by 27 publications

(10 citation statements)

References 4 publications

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“…Unfortunately, base-rate clocks are essential for demultiplexing and add-drop multiplexing. Assistive techniques can be used to improve the performance but at the expense of increased complexity [45], [46].…”

Section: Clock Recoverymentioning

confidence: 99%

High-Speed OTDM and WDM Networks Using Traveling-Wave Electroabsorption Modulators

Chou

Bowers

2007

IEEE J. Select. Topics Quantum Electron.

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Abstract-We describe the design and performance of a number of elements based on traveling-wave electroabsorption modulators (TW-EAMs) in optical time-division-multiplexing (OTDM) and wavelength-division-multiplexing (WDM) networks. The incorporation of traveling-wave (TW) electrode design into electroabsorption modulators (EAMs) relieves the resistance-capacitance (RC) bandwidth limitation common to lumped components, enabling higher operation speed without shortening the device. As a result, high-speed operation can be combined with essential modulator characteristics such as modulation efficiency and extinction ratio. While significant modulation bandwidth has been achieved, a lesser known aspect is that the TW electrode also provides an extra dimension for improving and enabling functionalities beyond broadband modulation. This new dimension originates from the distributed effect of the TW design and its interactions with distinctive EAM properties. This paper reviews such developments in recent years with specific applications for optical signal processing in OTDM and WDM networks. The covered functionalities include various optical gating operations for OTDM, regenerative wavelength conversions for WDM, and clock recovery.Index Terms-Clock recovery, electroabsorption, optical signal processing, optical time-division multiplexing (OTDM), travelingwave (TW), wavelength-division multiplexing (WDM).

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Section: Clock Recoverymentioning

confidence: 99%

High-Speed OTDM and WDM Networks Using Traveling-Wave Electroabsorption Modulators

Chou

Bowers

2007

IEEE J. Select. Topics Quantum Electron.

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“…A 40 GHz repetition rate pulse train is obtained at the output of this circuit that will be used as the control signal enabling the switching at the SOA-MZI. Several techniques to recover optical clock signals from 160 Gbit/s OTDM data streams have been proposed and demonstrated [42][43][44][45] . These techniques require further pulse shaping 19 as the recovered clock signal is usually a sine wave.…”

Section: Optical Demultiplexing From 160 To 40 Gbit/s Using Soa-mzi Amentioning

confidence: 99%

Technologies for optical networking in Nx160-Gbit/s DWDM networks

et al. 2003

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Future multi-terabit/s optical core networks require optical technologies capable of managing ultra-high bit rate OTDM/DWDM (optical time division multiplexing/ dense wavelength division multiplexing) channels at 160 Gbit/s or higher bit rates. The key functionalities in ultra-high speed network nodes are all-optical wavelength conversion, 3R-regeneration and demultiplexing of OTDM signals. Advanced optical networking techniques (optical add-drop multiplexing and optical routing) are studied in simulations and their performance evaluated considering 160 Gbit/s OTDM/DWDM channels. Performance comparison results for both OADM (optical add-drop multiplexer) and OXC (optical cross-connect) node networking functionalities are shown considering different technologies: semiconductoroptical-amplifier-based symmetric Mach-Zehnder interferometers (SOA-MZI) for wavelength conversion, signal regeneration and demultiplexing, electroabsorption-modulator-based demultiplexers, and wavelength converters based on four-wave mixing in dispersion-shifted fiber. The simulation results show that the SOA-MZI is a promising technology for all-optical signal processing in network nodes mainly due to its signal regeneration capability. At ultrahigh bit rates, however, the relaxation time of SOAs considerably limits the operation. A solution to mitigate this problem is to use a differential scheme at the input of the device. Error-free wavelength conversion, signal regeneration and demultiplexing of 160 Gbit/s OTDM signals employing a SOA-MZI with a differential scheme is demonstrated by means of simulations. Furthermore, the parameters of this architecture are optimized to obtain the best performance for each optical networking functionality in OADM and OXC network nodes.

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“…A number of different OCR methods have been demonstrated [2,3], with the work reported here utilising a ModeLocked Laser Diode (MLLD) [4,5]. The advantage of this method is that when an RZ data stream is injected into the MLLD, it produces a sub-harmonic optical pulse train as an output [4].…”

Section: Introductionmentioning

confidence: 99%

Dispersion Insensitive, High-Speed Optical Clock Recovery based on a Mode-Locked Laser Diode

Maguire

Reid

Barry

et al. 2008

OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference

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Recovery of 40 GHz optical clock from 160 Gbit/s data using regeneratively modelocked semiconductor laser

Cited by 27 publications

References 4 publications

High-Speed OTDM and WDM Networks Using Traveling-Wave Electroabsorption Modulators

High-Speed OTDM and WDM Networks Using Traveling-Wave Electroabsorption Modulators

Technologies for optical networking in Nx160-Gbit/s DWDM networks

Dispersion Insensitive, High-Speed Optical Clock Recovery based on a Mode-Locked Laser Diode

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