Self-pulsating DFB laser for all-optical clockrecovery at 40 Gbit/s

A simple model of self-pulsation in lasers is considered. The laser is described by the system of two ordinary differential equations for the number of photons in the cavity and the number of excitations in the active medium, leading to the equation for the oscillator Toda with damping. For the case of strong spiking, the damping is considered as perturbation; the estimates in terms of elementary functions are suggested for the period of pulsation, damping rate, amplitude and phase of pulsation, quasi-energy and the output power. These estimates are compared to the numerical solution and to the experimental data.

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“…where δ and E are determined with (25) and (26). The smoothed evolution of quasi-energy can be estimated with…”

Section: Damping As Perturbationmentioning

confidence: 99%

Self-pulsing laser as oscillator Toda: approximations through elementary functions

Kouznetsov¹,

Bisson²,

Li³

et al. 2007

J. Phys. A: Math. Theor.

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“…All-optical injection-locking techniques based on integrated semiconductor devices are very attractive for their small dimension and high-speed potential [42], [43]. For instance, a mode-locked laser diode can be injection-locked by an optical 160-Gb/s return-to-zero (RZ) signal and generates 160-GHz optical clock pulses [42].…”

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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“…Several techniques have been proposed so far for all-optical clock recovery. These include synchronized mode-locked ring lasers [13], [14], electronic phase-locked loops [15], use of a tuned Fabry-Pérot (FP) etalon [39] and self-pulsating DFB lasers [16]. Ring lasers, phase-locked loops, and FP etalons on their own are not suitable for data packets because they require a continuous data stream as input and they require a relatively long time to synchronize.…”

Section: B All-optical Packet Clock Recovery Circuitmentioning

confidence: 99%

“…Semiconductorbased devices [4] have lead the technology to a whole new class of compact circuits with very low power requirements that can be potentially integrated on a chip module. High-speed optical gates capable of performing bit-wise Boolean logic [5]- [12], clock recovery circuits [13]- [16], header separation and recognition techniques [17]- [22], optical flip-flops [23], and optical shift registers [24], [25] with read/write capability [25] are only part of the significant progress made up to now in the field. However, despite these achievements, integration of functionalities in a system environment to perform lossless packet processing and routing in the optical domain still remains an elusive target.…”

mentioning

confidence: 99%

Ultrafast nonlinear interferometer (UNI)-based digital optical circuits and their use in packet switching

Bintjas

Vlachos²,

Pleros

et al. 2003

J. Lightwave Technol.

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Abstract-Digital optical logic circuits capable of performing bit-wise signal processing are critical building blocks for the realization of future high-speed packet-switched networks. In this paper, we present recent advances in all-optical processing circuits and examine the potential of their integration into a system environment. On this concept, we demonstrate serial all-optical Boolean AND/XOR logic at 20 Gb/s and a novel all-optical packet clock recovery circuit, with low capturing time, suitable for burst-mode traffic. The circuits use the semiconductor-based ultrafast nonlinear interferometer (UNI) as the nonlinear switching element. We also present the integration of these circuits in a more complex unit that performs header and payload separation from short synchronous data packets at 10 Gb/s. Finally, we discuss a method to realize a novel packet scheduling switch architecture, which guarantees lossless communication for specific traffic burstiness constraints, using these logic units.Index Terms-All-optical signal processing, burst-packet traffic, packet switching, ultrafast nonlinear interferometer.

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Self-pulsating DFB laser for all-optical clockrecovery at 40 Gbit/s

Cited by 79 publications

References 2 publications

Self-pulsing laser as oscillator Toda: approximations through elementary functions

Self-pulsing laser as oscillator Toda: approximations through elementary functions

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

Ultrafast nonlinear interferometer (UNI)-based digital optical circuits and their use in packet switching

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