Bidirectional reconfigurable optical add-drop multiplexer with power compensation built-in optical amplifiers

Liaw, Shien‐Kuei; Hsieh, Yao-Sheng; Cheng, Wan-Lin; Chang, Chu-Lin; Ting, Hong-Fu

doi:10.1364/jon.7.000662

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Due to the inherent losses in all components, an integrated amplification element [23] is a reasonable design approach which is these days common in the industry.…”

Section: G Possible Roadm Designsmentioning

confidence: 99%

Opening up ROADMs: Let Us Build a Disaggregated Open Optical Line System

Kundrát

Havliš

Jedlinsky

et al. 2019

J. Lightwave Technol.

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At the lowest layer of today's communication networks is an optical line system (OLS), a physical network of equipment, which carries high-frequency analog light signals over thousands of kilometers. Traditionally, an OLS was delivered as a turn-key solution by a single vendor. Within an OLS, reconfigurable optical add/drop multiplexers (ROADMs) are active devices responsible for routing spectral chunks between input and output ports. ROADMs are arguably the most complex physical component of an OLS. In this paper, we describe an open design of a Czech Light ROADM, including the optical hardware, electronics, software, and the northbound communication interface. The performance of the ROADMs is evaluated in two test scenarios.

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“…Due to the inherent losses in all components, an integrated amplification element [23] is a reasonable design approach which is these days common in the industry.…”

Section: G Possible Roadm Designsmentioning

confidence: 99%

Opening up ROADMs: Let Us Build a Disaggregated Open Optical Line System

Kundrát

Havliš

Jedlinsky

et al. 2019

J. Lightwave Technol.

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show abstract

“…Recently, bidirectional isolators have also been proposed to improve the transmission performance of bidirectional fiber links [16], [17], i.e., a single fiber with channels in different directions. Reversible wavelength channels will need the bidirectional isolators to be reconfigurable and the required technologies have already been demonstrated in other devices such as bidirectional add-drop multiplexers [18]- [21].…”

Section: A Principle and System Requirementsmentioning

confidence: 99%

“…It is preferred that the optical switches can provide per-node add-drop functionality [35]. Depending on implementation considerations, bidirectional add-drop multiplexers may also be first used on each port [18]- [21], e.g., Ports 1, 2, 3 and 4 in Fig. 1.…”

Section: A Principle and System Requirementsmentioning

confidence: 99%

“…However, these proposals are mainly for reducing the deployment and operation costs of optical fiber networks. The performance benefits of reversible wavelength channels have been neglected, even though most of the required technologies such as bidirectional couplers [16], [17], bidirectional add-drop multiplexers [18]- [21], bidirectional optical amplification [22]- [30], and bidirectional optical switches [31]- [35] are already available. As more flexible bandwidth utilization is desired in today's networks, we propose reversible wavelength channels to be used in WR networks.…”

Section: Introductionmentioning

confidence: 99%

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On Wavelength-Routed Networks With Reversible Wavelength Channels

Wai

Li³

2013

J. Lightwave Technol.

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We observe that the performance of wavelengthrouted (WR) networks often suffers from asymmetric traffic and network traffic patterns differing from the original design plans. WR networks with a fixed number of channels in a given transmission direction are inflexible. Therefore, we propose reversible wavelength channels. Like a reversible lane in highway systems, a reversible wavelength channel has the flexibility of its transmission direction being configurable at the setup of a lightpath. So far reversible wavelength channels have not been discussed in WR networks even though we observe that most of the required technologies are already available. In this paper, we discuss all the required technologies for implementing reversible wavelength channels in WR networks. We demonstrate that reversible wavelength channel can provide significant performance improvement for WR networks when the traffic is asymmetric. Even if the traffic is symmetric, we also have nontrivial performance improvement with reversible wavelength channels, i.e., the blocking performance of WR networks with reversible wavelength channels will be similar to that of normal WR networks with doubling the number of fibers per link. Different implementation approaches for reversible wavelength channels are discussed. Among them, the performance of the reversible waveband approach is discussed in detail.Index Terms-Lightpath, reversible waveband, reversible wavelength channel, wavelength-routed networks.

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“…However, building ROADM in the access network is not suitable due to its high cost and complex structure [ 15 , 16 ]. Several types of single-line bidirectional add/drop multiplexers (SBOADMs) [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ], which can operate bidirectional transmissions on a single fiber loop, are later developed. The overall network construction cost can be reduced by removing the spare optical fiber loop.…”

Section: Introductionmentioning

confidence: 99%

Single-Line Bidirectional Optical Add/Drop Multiplexer for Ring Topology Optical Fiber Networks

Chang

Lin

2021

Sensors

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A new type of passive single-line bidirectional optical add/drop multiplexer (SBOADM) is proposed and experimentally demonstrated. When the proposed SBOADM is placed as a node of a ring topology optical fiber network, the special routing function of the SBOADM can always drop down the desired downstream signals whether the signals are injected into the SBOADM in either the clockwise (CW) or counterclockwise (CCW) direction and can upload and send back the upstream signals via the reversed optical pathway of the downstream signals. Once fiber link failure occurs in the optical network, the blocked network connections can be recovered immediately by sending out the downstream signals in both the CW and CCW directions of the fiber ring. As in all passive devices, the SBOADM needs no power supply or complicated network management to achieve the bidirectional function. Thus, the proposed device is an optimal solution to enhance the stability and reliability of rapidly developed optical fiber networks.

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Bidirectional reconfigurable optical add-drop multiplexer with power compensation built-in optical amplifiers

Cited by 10 publications

References 11 publications

Opening up ROADMs: Let Us Build a Disaggregated Open Optical Line System

Opening up ROADMs: Let Us Build a Disaggregated Open Optical Line System

On Wavelength-Routed Networks With Reversible Wavelength Channels

Single-Line Bidirectional Optical Add/Drop Multiplexer for Ring Topology Optical Fiber Networks

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