Published on:2026-05-24 Click:13
ROV 2 SM optic fiber signal neutrally buoyant cable. Foamed PUR, 2 single-mode fibers for dual-channel high-bandwidth fiber ROV tether with neutral buoyancy.
The 2-SM fiber neutrally buoyant ROV cable provides two independent OS2 single-mode fiber data links (primary + redundant, or two independent video channels) in a foamed PUR buoyant jacket. With no electrical conductors (data-only variant), the cable is ultra-lightweight and achieves neutral buoyancy with a thinner foam jacket than comparable electrical tethers. Power can be supplied separately or combined per specification. The foamed polyurethane (PUR) jacket uses a micro-cellular expanded jacket compound with a bulk density lower than seawater (~1.025 g/cm³), giving the cable near-zero or positive net buoyancy. This eliminates tether sag and reduces drag force on the ROV, improving vehicle manoeuvrability and reducing tether management workload during subsea operations.
| Parameter | Specification |
|---|---|
| Fiber | 2 x SM OS2 (9/125 μm) in loose tube |
| Electrical Cores | None (data-only) or per spec |
| Jacket | Foamed micro-cellular PUR |
| Buoyancy | Neutrally buoyant |
| Fiber Bandwidth | 10 Gbps+ per fiber |
| Depth Rating | Up to 6,000 m |
| Strength Member | Kevlar optional |
| Custom | Electrical cores, Kevlar, length, connector |
Request datasheet, custom length, or OEM pricing: sales@rovcable.com -- Shanghai Kabel Intelligence Technology Co., Ltd.
The jacket is manufactured from a micro-cellular expanded (foamed) polyurethane compound. During extrusion, a controlled foaming agent creates millions of tiny closed-cell air pockets within the jacket wall. These air cells reduce the bulk density of the jacket below that of seawater (~1.025 g/cm³), producing positive or neutral net buoyancy. The jacket retains all the abrasion resistance, oil resistance, and flexibility of standard PUR while achieving the buoyancy needed for ROV tether applications.
Option 1 -- Redundancy: one fiber carries the primary link; the other is the backup. If the primary fiber breaks, an optical switch (e.g., Sercalo MSS21 or equivalent) automatically routes to the backup within milliseconds. Option 2 -- Dual channel: both fibers used simultaneously for independent data streams, e.g., fiber 1 for 4K video and fiber 2 for sonar data. Option 3 -- WDM: both fibers used in opposite directions for full-duplex with a third wavelength spare.
