What is a Multi-Channel Fiber Optic Rotary Joint (MC-FORJ)?
A multi-channel fiber optic rotary joint transmits 2, 4, 8, 16 or more independent optical signals across a 360° rotating interface. Inside the housing, precision micro-optics and high-speed rotary alignment structures create a separate collimated beam path for each fiber channel. Light from every stationary fiber is coupled into its matching rotating fiber with ultra-low insertion loss (<1 dB typical) and negligible crosstalk (<-55 dB), so each channel can carry DC to >100 Gbps data, DWDM wavelengths or high-power laser energy simultaneously without interference. The result is maintenance-free, EMI-free rotation for advanced radar, medical imaging, robotic and energy systems.
Where Multi-Channel FORJs Are Used
1. AESA radar antennas – 8-channel FORJ feeds transmit/receive modules
2. Wind-turbine nacelles – 12-channel bundle for blade sensors, pitch control and fiber-optic strain monitoring
3. Medical CT/PET scanners – 4-16 channel links for rotating detector arrays
4. Subsea ROVs & trenchers – 4-32 channel umbilical reels for 4K cameras, LIDAR and sonar data
5. Broadcast 4K/8K cameras – 2-6 channel slip-rings for SMPTE 2110 IP video
6. Industrial robots – multi-channel FORJ plus power hybrid for laser-welding arms
7. Drone tether systems – 2-channel FORJ for power-over-fiber communication
8. Space simulation tables – 16-channel FORJ for fiber-optic gyro test equipment
Specification：
Items | Value |
Bandwidth | ±50nm |
Wavelength | 1310/1550(SM);850/1310(MM) |
Insertion Loss (Room Temperature) | ≤5dB |
Insertion Loss Fluctuation | ≤3dB |
Return Loss | ≥40dB(SM) |
Power Handling | ≤23dBm |
Tensile Strength | ≤12N |
Rotation Speed | 300rpm(provide customized higher speed) |
Estimated Lifetime | > 10 million rotations |
Operating Temperature | -20~60℃(-40~85℃ optional) |
Storage Temperature | -45~85℃ |
Weight (excluding tail cable and connector) | Depends on channels |
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 |
2~16 | 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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