Published on:2026-05-24 Click:26
Single-mode fiber 1x9/125 ROV tether, neutrally buoyant foamed PUR. OS2 single-mode 9/125 fiber for ROV tether requiring high-bandwidth data over neutral buoyant cable.
The 1x SM OS2 9/125 μm neutrally buoyant ROV tether uses a single ITU-T G.652D compliant OS2 single-mode fiber -- the international standard for long-distance single-mode fiber -- in a foamed PUR neutral-buoyancy tether. The 9/125 μm fiber (9 μm core / 125 μm cladding) supports 10 Gbps Ethernet (10GBASE-LR) at any ROV tether length, with attenuation as low as 0.2 dB/km at 1550 nm. 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 | 1 x SM OS2 (9/125 μm, G.652D) |
| Attenuation | ≤0.2 dB/km @ 1550 nm |
| Bandwidth | 10 Gbps+ (10GBASE-LR / 10GBASE-ZR) |
| Jacket | Foamed micro-cellular PUR |
| Buoyancy | Neutrally buoyant |
| Electrical Cores | Optional power conductors per spec |
| Depth Rating | Up to 6,000 m |
| Custom | Power cores, Kevlar, connector, length |
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.
Use a 10GBASE-LR SFP+ (1310 nm, single-mode, to 10 km) for distances up to 10 km. For shorter tethers (≤2 km), 10GBASE-LW (SONET OC-192) is also compatible. For 1 Gbps (1000BASE-LX), use a 1000BASE-LX SFP (1310 nm, single-mode). For bi-directional single-fiber operation, use a pair of 1000BASE-BX10-D and 1000BASE-BX10-U SFPs (Tx at 1490/1310 nm, Rx at the opposite wavelength). Confirm the transceiver TX power and RX sensitivity against the tether length and connector loss budget.
