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FORJ: Miniature fiber rotary joints (MicroJx Series)


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IL temperature cycling

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RL temperature cycling

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MJX series Fiber Optic Rotary Joints (FORJs) are extremely compact. So small they can even be used in the middle of fluid flows. They are the world's smallest and lightest. They feature very low insertion loss and impressive return loss performance. Model MJXA typically yields return loss figures higher than 60 dB. Similar to R series and RFCX series, the MJX Series FORJs contain fluid, which ensures condensation free operation at extreme low temperatures. It is also ideal for high humidity environments.

The standard packages are dust and water tight for harsh environment applications. They are designed to tolerate both occasional water splash and shallow water (or oil) immersion. These rugged devices can operate under arctic temperature environment (See insertion loss temperature cycling plot on the left).

This model's low static and dynamic torques makes it an ideal choice for low torque applications such as optogenetics. For pigtail-free option consider Princetel's model RFCX, RFC, or RST. In those cases, remember to specify "low torque".

MJX-SAP is specifically designed for OCT (Optical Coherent Tomography) applications. Its mounting scheme is idential to MJP-SAP model FORJ. We offer gear (shown in picture) or pulley as driving mechanism. The receptacle can be SC/APC (shown in picture), FC/APC, or LC/APC.

Note: All insertion loss and return loss measurements are performed by joining the FORJ to the light source through fusion splice (without the use of connectors). Insertion loss of all receptacle type of FORJs, such as RST, RFC, and RFCX, are measured with connectors of similar type. Their return loss is not measured.

Wavelength range 650-1650 nm
Insertion loss <2 dB (typical: <0.5 dB)
Insertion loss ripple <+/-0.25 dB (typical: +/-0.15 dB)
Return loss (SM) >40 dB (typical: 45 dB, 23 C), >55 dB (MJXA)
Maximum speed 2,000 rpm
Water submersion 1 m, (model RPC for pressure compensation)
Pulling strength 10 N (900 um buffer)
Start up torque <0.01 Nm
Estimated life cycle 200-400 million revolutions
Optical power handling 5 mW/standard; 23 mW/optional
Working temperature -40 to 85 C
Storage temperature -50 to 85 C
Package style Pigtails on both ends
Housing material Stainless steel
Fiber types Single or multimode w/3 mm jacket (Kevlar/PVC)
Connector types FC, SC, ST, SMA, or LC (and APC finishes)
Dimensions 6.8 mm dia. x 28 mm length
Weight 10 g
Vibration MIL-STD-167-1A
Mechanical shock MIL-STD-810G
IP rating IP 68 for all models

MJX- wavelength code- fiber code- connector code
MJXA- wavelength code- fiber code- connector code


Download PDF drawing for MJX
Download Solidworks 3-D drawing for MJX

Download PDF drawing for MJX10
Download Solidworks 3-D drawing for MJX10

Download PDF drawing for MJX-SAP
Download Solidworks 3-D drawing for MJX-SAP

Download PDF drawing for MJX-SAPB(FAPB) (belt drive)
Download Solidworks 3-D drawing for MJX-SAPB(FAPB) (belt drive)

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