Iranian Quantum Communication ADSS Optical Cable Remote Monitoring Type

The Iranian quantum communication network likely uses All-Dielectric Self-Supporting (ADSS) optical cables with high tracking resistance, self-supporting design, and remote monitoring capabilities for secure, high-voltage aerial deployment.

ADSS Cable Overview

ADSS (All-Dielectric Self-Supporting) cables are metal-free aerial fiber optic cables designed to be installed along high-voltage power lines without requiring a separate support wire . Their all-dielectric construction ensures electrical insulation, making them suitable for environments with voltages ranging from 110 kV to 500 kV . The self-supporting design allows the cable to bear its own weight and withstand environmental loads such as wind, ice, and UV exposure .

Structural Design

ADSS cables are typically manufactured in two main structural types:

• Central tube design: Compact and cost-effective, ideal for short to medium spans (50–150 meters) and fiber counts of 12–48 cores .
• Layered twist (SZ-stranded) design: Provides slack for mid-span access and supports longer spans, up to 700 meters between towers . The cables can carry up to 432 fibers in standard configurations, with options for gel-filled or gel-free buffer tubes to protect fibers from moisture and mechanical strain . Single-mode fibers operating at 1310 nm or 1550 nm allow circuits up to 100 km without repeaters .

High-Voltage and Tracking Resistance

For deployment near high-voltage lines, ADSS cables are designed to resist electrical tracking, which occurs when corona discharges form on the cable sheath due to humidity, pollution, and electric fields . The outer polymer sheath is made of tracking-resistant materials, and the cable suspension points are selected to maintain electric-field potentials below 25 kV . This ensures long-term mechanical and optical reliability in harsh environments.

Remote Monitoring Considerations

While ADSS cables themselves are passive, remote monitoring systems can be integrated to track:

• Optical signal integrity using OTDR (Optical Time-Domain Reflectometry)
• Fiber attenuation and loss
• Environmental stress such as temperature, wind, and ice load on spans
• Potential electrical interference from nearby high-voltage lines These monitoring systems are critical for quantum communication networks, where maintaining low-loss, stable optical paths is essential for secure quantum key distribution.

Installation and Operational Notes

• Cables are mounted on transmission towers or poles using specialized suspension and tensioning hardware .
• Hanging points are chosen to minimize exposure to high electric fields and avoid mechanical collisions with conductors .
• Double-jacket or torque-balanced designs are used for longer spans or higher mechanical loads .

Summary

For Iranian quantum communication applications, the ADSS optical cable type is likely a high-fiber-count, single-mode, tracking-resistant, all-dielectric self-supporting cable with remote monitoring integration. Its design ensures safe aerial deployment along high-voltage lines, low optical loss, and reliable operation in harsh environmental conditions, which are critical for quantum communication security and performance .