Solving for Scalability From Multi-Band to Multi-Rail Core Networks

Schmogrow, R.

doi:10.1109/jlt.2022.3172628

Cited by 10 publications

(5 citation statements)

References 61 publications

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“…The study undermined the flexibility of a scaled node by increasing the number of directions, hence requiring network-level solutions. Another study by R. Schmogrow discovered a novel concept of an extra switching layer (inner fiber, outer fiber, or band switch) into WSSs [17]. The study developed a hybrid ROADM node that combined wavelength and fiber or band switching capabilities.…”

Section: Related Workmentioning

confidence: 99%

“…Although the table only highlighted four significant bit rates, the capacity increments were set at 20 Gb/s. The proposed IP over EON approach accommodated a 20 % increase in traffic demand over IP over low-rate wavelengths [17], providing significant efficiency and cost-saving improvements for optical networks requiring multiple flows. Therefore, the proposed ROADM produced superior performance characteristics and was well-suited for EON application.…”

Section: Tablementioning

confidence: 99%

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Optimizing performance in elastic optical networks using advanced reconfigurable optical add-drop multiplexers: A novel design approach and comprehensive analysis

Khosravi,

Shadaram

2024

Optical Fiber Technology

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Section: Related Workmentioning

confidence: 99%

Section: Tablementioning

confidence: 99%

Optimizing performance in elastic optical networks using advanced reconfigurable optical add-drop multiplexers: A novel design approach and comprehensive analysis

Khosravi,

Shadaram

2024

Optical Fiber Technology

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“…Future OXC switches may be required to accommodate several types of switching granularity demands, requiring a multigranular (layered) OXC structure to be employed [68], [69], consisting of wavelength switch, wavelengthband switch [70], and spatial switch. In the future, when huge optical path capacities with over 10 Tb/s will dominate, a spatial switch-based SDM OXC architecture will become very efficient [71], [72], [73]. For a smooth migration from today's WSS-based networks to future SDM networks, scalable architectures are important aspects to be addressed [74], [75].…”

Section: Sdm Optical Switching Node Aspectmentioning

confidence: 99%

Optical Switching in Future Fiber-Optic Networks Utilizing Spectral and Spatial Degrees of Freedom

et al. 2022

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Forthcoming capacity scaling requirements of optical networks and advances in optical fiber communications beyond the omnipresent single-mode fiber operating over the conventional band introduces new opportunities and challenges for exploiting the expanded spectral and spatial resources available for fiber-optic network designs. The spectral and spatial degrees of freedom introduce utilization tradeoffs that can be leveraged under different applications. After briefly reviewing the supporting network building elements (emerging fiber types, multiplexers, optical switches, and amplifiers), we consider networking scenarios such as intra/inter datacenter, terrestrial, undersea, and wireless 5G/6G hauling networks and identify the best utilization plan and key attributes that can be harnessed by the offered spectral and spatial degrees of freedom for each scenario and how optical switching can be employed therein for traffic management. Networks supporting these scenarios are Manuscript

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“…Therefore, innovative approaches for an efficient and adaptable scaling of transmission capacity, without changing the already deployed and installed fiber plants, is a major concern for operators in the mid-term. In this regard, roadmaps for multi-band (MB) or so-called bandwidth division multiplexing (BDM) systems from O-to U-band (1260-1675 nm) covering 59 THz in bandwidth have gained momentum [3][4][5][6]. While at the same time, the experimental research for single mode fiber is mainly limited to partially filled S-C-L-band systems up to a total bandwidth of 19.8 THz [7][8][9][10], and only recently the first experiments including a coherent reception in the E-band are presented [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of C-Band Coherent Receiver Front-Ends for Transmission Systems Beyond S-C-L-Band

Emmerich,

Schmidt-Langhorst,

Schubert

et al. 2023

IEEE Photon. Technol. Lett.

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The reuse of already deployed single mode fiber is seen as one of the key enablers for cost-efficient capacity upgrades of optical transmission systems. Unlocking the benefits of other transmission bands, to further increase the capacity, can enable optical networks to adapt to highly dynamic traffic patterns. In the here and now, C-band based optical coherent receiver frontends would be a cost-effective solution to support bandwidth division multiplexing without the need for bespoke and expensive per band receiver designs. To investigate a potential use of already existing C-band receivers for multi-band applications, we present a simple and rapid measurement method to characterize the quadrature phase error and the electrical output swing. We experimentally characterize four different commercially available C-band receivers from the upper E-to lower U-band covering 25.4 THz (i.e. 200 nm) of total bandwidth. The obtained results reveal that micro-optics based discrete 90° hybrids and discrete indium phosphide (InP) balanced photodetectors are promising candidates for multi-band systems. While at the same time, the investigated receivers based on photonic integrated circuits in InP suffer from a strong quadrature phase error and a reduced common mode rejection ratio in the wavelength regime below the C-band.

show abstract

Solving for Scalability From Multi-Band to Multi-Rail Core Networks

Cited by 10 publications

References 61 publications

Optimizing performance in elastic optical networks using advanced reconfigurable optical add-drop multiplexers: A novel design approach and comprehensive analysis

Optimizing performance in elastic optical networks using advanced reconfigurable optical add-drop multiplexers: A novel design approach and comprehensive analysis

Optical Switching in Future Fiber-Optic Networks Utilizing Spectral and Spatial Degrees of Freedom

Characterization of C-Band Coherent Receiver Front-Ends for Transmission Systems Beyond S-C-L-Band

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