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HomeSubmarine and Long-HaulPage 2

Submarine and Long-Haul

Showing 11 - 20 of 275 results
Span-Loss-Capability-and-GOSNR-Margin-Two-Separate-Ceilings_12_08_2026_22_08_48

Span Loss Capability and GOSNR Margin: Two Separate Ceilings in Long-Span Design

A long span fails in one of two distinct ways: the amplifier …
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  • August 12, 2026
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First-Second-and-Third-Order-Raman-Pumping_12_08_2026_21_53_58

First, Second, and Third Order Raman Pumping

Why cascaded pumping moves the gain region rather than simply adding gain, and what that buys on spans …
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  • August 12, 2026
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Festoon-and-Unrepeatered-Submarine-Link-Engineering_12_08_2026_21_10_33

Festoon and Unrepeatered Submarine Link Engineering

The no-mid-span-amplifier constraint and the four-stage amplification ladder that closes span loss from the shore alone: boosters, backward and third-order......
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  • August 12, 2026
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Optical-Fiber-Characteristics-Complete-Parameter-Reference_12_08_2026_20_29_46

Optical Fiber Characteristics: Complete Parameter Reference

Every parameter on a single-mode fibre datasheet, defined against its ITU-T recommended value and mapped to the design decision it......
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  • August 12, 2026
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IMG_0229

Optical Monitoring Implementation Checklist: Counters to KPIs

Which performance counters to collect, which managed entity carries each one, where to find them in any vendor’s... …
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  • August 9, 2026
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Fiber-Characteristics-Complete-Parameter-Reference_05_08_2026_21_29_49

Fiber Characteristics: Complete Parameter Reference

Every parameter that defines an optical fiber, from numerical aperture and mode field diameter to attenuation, dispersion, PMD, nonlinear coefficients...
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  • August 5, 2026
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FEC-families-for-coherent-interfaces-CFEC-and-OFEC_05_08_2026_21_01_18

FEC Families for Coherent Interfaces: CFEC and OFEC

Hard-decision and soft-decision coding, net coding gain, overhead and latency per family, and the interface class …
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  • August 5, 2026
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Know-Your-Fiber-First-featured-image_05_08_2026_20_52_40

Know Your Fiber First: Fiber Parameters and Capacity

Attenuation, effective area, dispersion and PMD set the OSNR budget, the launch power optimum, the repair …
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  • August 5, 2026
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Optical-Network-Monitoring-Dashboards-feature-image

Optical Network Monitoring Dashboards: Tools and Automation

Building the telemetry pipeline, panel hierarchy and alerting logic that turn optical performance data into an operational picture... …
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  • August 3, 2026
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Power-Equalization-Methodology-for-DWDM-Line-Systems

Power Equalization Methodology for DWDM Line Systems

Where per-channel power is measured, what it is measured against, and the ordered sequence of gain, tilt and per-slot commands...
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  • August 3, 2026
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