An optical FDM-based self-healing ring network employing arrayed waveguide grating filters and EDFA's with level equalizers

Toba, H.; Oda, Kazuhiro; Inoue, Kyo; Nosu, K.; Kitoh, T.

doi:10.1109/49.510904

Cited by 44 publications

(8 citation statements)

References 33 publications

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“…Note that the networks that have channel assignments for all requests with load at most utilize the channels as efficiently as networks with full wavelength conversion at all nodes. Also note that the first deployed WDM networks are likely to be rings, as seen from several recent testbeds (see, for example [5], [22]). …”

Section: B Organizationmentioning

confidence: 99%

Multiwavelength optical networks with limited wavelength conversion

Ramaswami

Sasaki

1998

IEEE/ACM Trans. Networking

170

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This paper proposes optical wavelength division multiplexed (WDM) networks with limited wavelength conversion that can efficiently support lightpaths (connections) between nodes. Each lightpath follows a route in a network and must be assigned a channel on each link along the route. The load max of a set of lightpaths is the maximum over all links of the number of lightpaths that use the link. At least max wavelengths will be needed to assign channels to the lightpaths. If the network has full wavelength conversion capabilities, then max wavelengths are sufficient to perform the channel assignment.Ring networks with fixed wavelength conversion capability within the nodes are proposed that can support all lightpath sets with load max at most W 0 1; where W is the number of wavelengths in each link. Ring networks with a small additional amount of wavelength conversion capability within the nodes are also proposed that allow the support of any set of lightpaths with load max at most W . A star network is also proposed with fixed wavelength conversion capability at its hub node that can support all lightpath sets with load max at most W . These results are extended to tree networks and networks with arbitrary topologies. This provides evidence that significant improvements in traffic-carrying capacity can be obtained in WDM networks by providing very limited wavelength conversion capability within the network.

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Section: B Organizationmentioning

confidence: 99%

Multiwavelength optical networks with limited wavelength conversion

Ramaswami

Sasaki

1998

IEEE/ACM Trans. Networking

170

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“…Among those are planar lightwave circuits (PLCs) [20], longperiod fiber gratings [21], Fabry-Perot etalon filters [22], periodic tapered fiber filters [23J and so on.…”

Section: Bandwidth Expansion Toward 16 J-lmmentioning

confidence: 99%

Broadband and Gain-Flattened Optical Fiber Amplifiers

Nishimura

1998

Solid-State Science and Technology Library

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Abstract. Broadband and gain-flattened erbium-doped fiber amplifiers are being widely developed to meet the requirements posed by wavelengthdivision-multiplexed transmission systems/networks pursuing the ultimate capacity. One approach is the improvement of erbium-doped fiber itself for broader gain bandwidth or better gain flatness. In addition to the wellknown aluminum-codoped silica fibers and the fluoride glass fibers, rather new materials, such as tellurite glass, or hybrid configurations which utilize two or more erbium-doped fibers with different glass compositions are being examined. Another approach is the use of gain-equalizing optical filters. One of the most promising gain equalizing techniques is the long-period fiber grating. In order to maintain the gain flatness even under variable operational conditions, control schemes of the optical fiber amplifiers are also a critical issue.

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“…It is clear that the increase in penalty was due to the influence of the added signal. The degradation of BER in the filter was caused by coherent crosstalk as reported in [9] where the power penalty due to the coherent crosstalk is expressed as (1) assuming an optimizing-threshold-type receiver and random polarization. Here, is the power ratio between the filter's added and dropped signals, and is 6 for the error rate of 10 .…”

Section: A Ber Performancementioning

confidence: 99%

“…T HE COMBINATION of wavelength-divisionmultiplexing (WDM) link technology and optical add/drop multiplexers (OADM's) is promising as a nextgeneration optical network, because the WDM link increases the capacity of the network [1]. A WDM network with dynamic OADM enables the operation, administration, and maintenance to be based on optical path technology [2].…”

Section: Introductionmentioning

confidence: 99%