LINDEN-SPE-7098-1 High-Strength Buoyant 750 is a rugged singlemode buoyant fiber optic tether designed for subsea, marine robotics, inspection, research, and harsh underwater communication environments. This cable is built for applications where a lightweight floating profile, high tensile strength, and reliable optical performance are required in one compact cable construction.

The LINDEN-SPE-7098 product family is listed by Linden Photonics as a High Strength STFOC™ Singlemode 9/125 fiber optic cable with one fiber, proprietary strength layer, two-layer secondary buffer, and an abrasion-resistant outside layer. The product selector lists the cable as buoyant, with 0.137 inch / 3.5 mm outside diameter, 750 lb / 341 kg ultimate tensile strength, and singlemode fiber construction.

Product Overview

The LINDEN-SPE-7098-1 is suitable for underwater systems that need a strong but manageable optical tether. Its buoyant design helps reduce drag and handling issues in water, while the high-strength construction supports demanding deployment conditions. The cable is especially useful where copper power conductors are not required and the primary need is high-speed optical data transmission over long distances.

This makes it a strong choice for ROVs, AUV support systems, subsea sensors, remote inspection platforms, oceanographic research, defense-related marine systems, and long-distance underwater data links.

Key Features

• High-strength buoyant fiber optic tether
• Singlemode 9/125 optical fiber
• One-fiber construction
• Compact 3.5 mm outside diameter
• 750 lb tensile strength
• Approx. 341 kg tensile strength
• Buoyant cable design for underwater use
• Proprietary strength layer
• Abrasion-resistant outer layer
• Lightweight and flexible compared with many heavy underwater cable options
• Suitable for long continuous lengths and demanding subsea environments

The official specification sheet for LINDEN-SPE-7098 states attenuation values of < 0.45 dB/km at 1310 nm and < 0.35 dB/km at 1550 nm, with optical propagation loss measurements performed on all cables at both wavelengths. It also lists 750 lb tensile strength and a recommended safe working load guideline of 15% / 113 lb, depending on application and environment.

Technical Description

LINDEN-SPE-7098-1 is engineered around a singlemode optical fiber core for long-distance data transmission. The cable uses Linden’s proprietary strength and jacket construction to combine strength, flexibility, abrasion resistance, and buoyancy.

The low outside diameter helps reduce the size and weight of the tether system, which is important for compact ROVs and subsea equipment where bulky cables can affect movement, drag, and deployment efficiency. Its buoyant behavior helps the tether remain more manageable in water compared with non-buoyant cables that may sink, snag, or add unwanted load to the system.