Over 7nm (875GHz) continuous wavelength tuning by tunable twin-guide (TTG) laser diode

Illek, S.; Thulke, W.; Schanen, C.; Lang, Hans Peter; Amann, M.-C.

doi:10.1049/el:19900030

Cited by 79 publications

(14 citation statements)

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“…Therefore, Max. throughput = Pr{ at least one successful reservation} (2) Because of the uniform selection of the scheduling and reservation policies, the probability that input module i makes a reservation to output j in slot k :is:…”

Section: Random Policymentioning

confidence: 99%

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<title>8-Tb/s ATM interconnection through optical WDM networks</title>

et al. 1996

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We propose a novel scheme for interconnection of multiple high-speed (2.5/10 Gb/s) ATM streams through an optical WDM network, with a total network capacity of up to 8 ThIs. The proposed architecture is based on placing the optical WDM portion of the network in a physically small area, i.e., one central office, or in a single rack. This helps to avoid technological obstacles such as power budget, dispersion, and synchronization limitations. and optical output buffering. The interconnection is an ATM packet switched network, and provides optical contention resolution. We show that the implementation of such a network is possible using currently available optoelectronic technology. Simulation results are presented. indicating network throughput of up to 100%.Key words: 8 Tb/s ATM interconnection, WDM network, ATM switch, ATMJ'WDM. IINTRODUCTIONNext generation high-speed communications systems will need to support the aggregate bandwidth and low latency interconnection requirements of current and future applications such as supercomputer interconnection, high-quality video conferencing, multimedia distance learning, and real-time medical imaging. Many current approaches favor A1'M technology, due to its flexibility and support of multimedia traffic. Currently, 16x16 ATM switches are commercially available, and 256x256 ATM switches are being developed. The output of these ATM switches can be multiplexed to produce an output SONET stream of 2.5 Gb/s.Here, we propose a novel scheme of interconnecting multiple high-speed (2.5/10 Gb/s) ATM streams with a total network throughput of up to 8 Th/s. The proposed architecture is shown in Fig. 1; it relies on ATM interconnection through an optical WDM network, and is based on the marriage between the flexibility of ATM technology and the aggregate bandwidth available in all-optical WDM networks. All interconnections between the ATM "islands' or supercomputers through the proposed ATM/WDM network will be transparent to the end-user, therefore capable of forming higher-level size ATM network.

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Section: Random Policymentioning

confidence: 99%

“…The largest continuous tuning range demonstrated in a semiconductor laser is of 7 nm [l], [2]. There are DBR lasers with a "quasicontinuous tuning range (involving mode hopes) of I 1 nm [3].…”

Section: Laser Tuning Rangementioning

confidence: 99%

<title>8-Tb/s ATM interconnection through optical WDM networks</title>

et al. 1996

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“…Among these are the multisection DBR devices [19,20,21] and the TTG (Tunable Twin-Guide) laser [22,23], in both of which tuning is performed by index change in a passive region and multisection DFB lasers, in which an axially varying bias to the active region induces the wavelength tuning [24,25,26].…”

Section: )mentioning

confidence: 99%

“…8a [23,34,35]. This laser can be considered as a single mode DFB laser whose effective refractive index is tuned homogeneously along the laser axis by means of current It.…”

Section: Transversely Integrated Structuresmentioning

confidence: 99%

Wavelength Tunable Laser Diodes and Their Applications

Amann¹

1995

Trends in Optical Fibre Metrology and Standards

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Single mode laser diodes with an electronically tunable wavelength are among the key components needed for advanced applications in optical communications, measurement and sensing. In particular, these devices may be used as wavelength controllable transmitters in wavelength division multiplexing or as local oscillators in optical receivers using the coherent detection technique. Furthermore, distance measurements with a high accuracy and large repetition frequency as well as threedimensional viewing are feasible using the frequency modulated continuous wave radar technique in the optical domain. Also numerous measurement techniques in optoelectronics and fiber optics can be performed by means of wavelength tunable lasers. This paper reviews the recent progress made on electronically wavelength tunable laser diodes in the InGaAsP material system at 1.5 11m wavelength. The operation principles and technological approaches of the various device concepts are presented and the laser parameters relevant for anticipated applications, such as tuning range, spectral linewidth and wavelength access, are discussed.The continuous and discontinuous tuning modes are introduced, compared and the physical limitations with respect to the maximum tuning ranges are commented on. Particular attention is paid to device handling and the effort needed for wavelength control which are most important for practical applications.

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“…ECENTLY there has been an extensive research ef-R fort [ 11- [4] to fabricate broad-band tunable semiconductor laser, with the objective of covering the entire gain-bandwidth, preferably with single longitudinal-mode operation. Such a device would play a major role in spectroscopy, wavelength-division multiplexed systems, as well as in coherent heterodyne-detection systems.…”

Section: Introductionmentioning

confidence: 99%

Frequency response and tunability of grating-assisted directional couplers

Griffel

Yariv

1991

IEEE J. Quantum Electron.

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Abstract-The spectral properties of grating-assisted directional couplers are studied using an improved coupled mode formulation. Key parameters for the design of these structures, such as the grating period, the coupling length, and other structural parameters, are calculated. The frequency response, the filter bandwidth, and the tuning range are analyzed. The technique is used to examine a specific case of InGaAsP-InP tunable filter, and the results are compared to a prior experiment.

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Over 7nm (875GHz) continuous wavelength tuning by tunable twin-guide (TTG) laser diode

Cited by 79 publications

References 0 publications

<title>8-Tb/s ATM interconnection through optical WDM networks</title>

<title>8-Tb/s ATM interconnection through optical WDM networks</title>

Wavelength Tunable Laser Diodes and Their Applications

Frequency response and tunability of grating-assisted directional couplers

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