What is a Single-Channel Fiber Optic Rotary Joint (FORJ)?
A single-channel fiber optic rotary joint—often called a fiber optic slip ring—is a precision electro-optical device that allows uninterrupted transmission of optical signals across a continuously rotating interface. It works by coupling light from a stationary fiber into a rotating fiber (or vice-versa) through a collimated lens system. Because only glass and light meet at the interface, the device is immune to EMI, offers extremely low insertion loss (<0.5 dB typical) and delivers data rates from DC to >100 Gbps with virtually no bit-error-rate penalty. The result is maintenance-free rotation for single-mode or multimode fiber links in radar pedestals, wind turbines, medical CT scanners, robotic welders, ROVs and more.
Where Single-Channel FORJs Excel
1. Defense & Aerospace – EO/IR gimbals, surveillance turrets, missile seeker test stands
2. Wind Energy – blade-pitch control on 1–15 MW turbines (replaces copper lightning target)
3. Medical Imaging – high-speed data link inside rotating CT & PET gantries
4. Robotics & Factory Automation – 6-axis laser-cutting arms, cable reels, packaging machines
5. Oil & Gas – down-hole logging winches, offshore umbilical reels, LARS systems
6. Broadcasting – 4K/8K camera cranes, VR slip-rigs, satellite news vehicles
7. Subsea & Marine – ROV tether drums, AUV docking stations, oceanographic winches
8. Test Equipment – centrifuges, fiber-optic gyro test tables, space simulation chambers
Specification：
Items | Value |
Bandwidth | ±50nm |
Wavelength | 1310/1550(SM);850/1310(MM) |
Insertion Loss(Room Temperature) | ≤3.5dB |
Insertion Loss Fluctuation | ≤1.5dB |
Return Loss | ≥40dB(SM) |
Power Handling | ≤23dBm |
Tensile Strength | ≤12N |
Rotation Speed | 0~300rpm(higher speeds can be customized) |
Estimated Lifetime | > 100 million rotations |
Operating Temperature | -20~60℃(-40~85℃ optional) |
Storage Temperature | -45~85℃ |
Weight (excluding tail cable and connector) | 185g |
Vibration and Impact Standard | GJB150 Land Mobile |
Protection Class | IP54 (IP65, IP67 optional) |
Dimensions：
Ordering Information：
SLSR-①-②-③-④-⑤-⑥
Example: SLSR-1-9/125-1310-1-1-FC/PC
1.Channels | 2.Fiber Type | 3.Wavelength | 4. Tubes | 5.Fiber Length | 6. Connectors |
2~7 | 1. 9/125(single-mode) 2. 50/125(multi-mode) 3. 62.5/125(multi-mode) | 1550 1310 850 | Bare fiber 900um 2mm tubes 3mm tubes A(armored) | 1. Default(1M) 2. 2M 3. 3M 4. … | FC/PC FC/APC … |
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