12-Core Fibre + 2-Power Hybrid Underwater Connector — 12 Channel Fibre, 8,000m Depth, Expanded Beam

12-Core Fibre + 2-Contact Power Hybrid Underwater Connector — Overview

This 12-core hybrid underwater connector combines 12 independent optical fibre channels and 2 electrical power contacts in a single connector body, rated to 8,000 metres design depth. It is the highest-channel-count fibre optic connector in the series — designed for deep-water systems demanding maximum optical bandwidth: multi-stream HD video, high-speed multiplexed data, multi-sensor telemetry, and control signals simultaneously, alongside electrical power, all through one connector.

All 12 optical channels use expanded beam ball lens technology. With 12 independent fibre passes, a single connector can support an entire deep-water system's optical communication requirements — video, Ethernet, serial data, acoustic telemetry, and optical sensor circuits — without a multiplexer or additional connectors.

Key Design Features

• 12 independent optical fibre channels + 2 power contacts — highest channel count in the series; supports full-system optical bandwidth plus power in one connector
• 8,000 metre depth rating — exceeds the operating depth of all commercial deep-water ROV and scientific vehicle systems
• Expanded beam ball lens on all 12 channels — all channels are contamination-tolerant, field-cleanable, and rated for unlimited mating cycles simultaneously
• Single-mode, multi-mode, or mixed SM+MM — allocate channels by fibre type to match circuit requirements (e.g. SM for long-distance data, MM for on-board video)
• Eliminates the need for subsea multiplexers — 12 separate optical channels through one connector can replace multiple separate fibre links and associated multiplexing equipment
• Reduces penetration count dramatically — BCR bulkhead variant replaces 6+ separate 2-core fibre feedthroughs with one structural penetration
• Nickel Aluminium Bronze / Stainless Steel / Titanium housing options for deployment environment optimisation
• Field re-terminable on all 12 channels — expanded beam design allows on-deck re-termination of any channel without workshop equipment

Technical Specifications

Typical Applications

• Deep-water ROV systems requiring 12-channel full-bandwidth optical connectivity — multi-stream HD video, multiplexed Ethernet data, sensor telemetry, and control signals simultaneously
• Scientific research submersibles and vehicles requiring maximum fibre channel count for multi-instrument data collection
• Subsea data hubs and optical distribution nodes routing 12 independent fibre circuits through a single housing penetration
• Cabled ocean observatory backbone nodes requiring high-channel-count fibre distribution and power in one interface
• Deep-sea drilling and subsea completion systems with high-density fibre monitoring and control requirements
• Naval and defence deep-water systems requiring maximum optical bandwidth per connector
• Long-duration autonomous underwater observatory systems with multi-sensor multi-channel optical telemetry requirements

Why Expanded Beam — The Advantage Over Physical Contact Fibre Connectors

1. Tolerates Contamination — No Precision Polishing Required Subsea

Expanded beam technology enlarges the light beam to approximately 1.5 mm in diameter before it crosses the air gap between the two lenses. At this diameter, a dust particle or water droplet on the lens face occupies only a tiny fraction of the beam cross-section, causing negligible signal loss. Physical contact connectors focus light through a 9 µm core (single-mode) — a single dust particle can completely obstruct the beam and cause catastrophic signal loss. In subsea environments where cleaning is difficult or impossible, expanded beam is the only reliable choice.

2. Unlimited Mating Cycles — No Wear Mechanism

Physical contact connectors degrade with every mating cycle as the polished ferrule faces abrade against each other. Expanded beam connectors mate lens-to-lens across an air gap — there is no physical contact between the optical surfaces, no abrasion, and no degradation of optical performance over time. Unlimited mating cycles are qualified without any change in insertion loss.

3. Field Re-terminable — No Specialist Polishing Equipment Required

The spherical ball lens design allows the connector to be re-terminated in the field using a simple termination kit. The lens can be cleaned with a cotton swab in seconds. Physical contact connectors require precision polishing machines and inspection microscopes to achieve an acceptable end-face geometry — impractical on a vessel deck or at a shoreside deployment site.

4. Multiple Housing Materials for Any Environment

Available in Nickel Aluminium Bronze C63000, Stainless Steel AISI 316, and Titanium Grade 2 — allowing system designers to optimise for corrosion resistance, weight, or cost depending on mission profile and deployment duration.

5. Mixed Single-Mode and Multi-Mode in One Connector

Both single-mode and multi-mode fibres can be accommodated within the same connector body, enabling a single connector to serve mixed data (single-mode, long-distance) and video (multi-mode, short-distance) circuits simultaneously — reducing connector count and penetration points on the pressure housing.

Installation, Cleaning, and Maintenance Guidelines

Lens Cleaning Procedure

• Inspect the ball lens face under a 400× inspection microscope before every mating cycle — even minor contamination visible at this magnification should be removed before connecting.
• Clean the lens face with a lint-free cotton swab dampened with isopropyl alcohol (IPA, 99%+ purity). Allow to dry completely before mating — residual IPA causes temporary elevated insertion loss.
• Do not use dry swabs — they generate static charge that attracts particles back to the lens surface.
• Never touch the lens surface with bare fingers — skin oils cause persistent contamination that requires repeated cleaning cycles.

Mating Procedure

• Verify lens faces are clean and free of contamination on both connectors before mating.
• Align the connector keying features before applying axial force — do not rotate the connector during insertion if it is a push-pull (CCP) type.
• For threaded types (BCR/FCR), engage threads carefully and tighten to the specified torque — do not overtighten as this can distort the housing and affect optical alignment.
• Verify optical continuity with an optical power meter after mating — acceptable insertion loss should be within the connector's specified range.

Storage and Protection

• Always install protective dust caps on unmated connector faces during storage, transit, and any period when the connector is not in use.
• Store connectors in a clean, dry environment — the ball lens is robust, but contamination accumulation over extended storage will require cleaning before use.
• For long-term seabed deployment with one connector face unmated, use a pressure-rated protective cap rated to the full deployment depth.