Novel Crosstalk Measurement Method for Multi-Core Fiber Fan-In/Fan-Out Devices

We propose a new crosstalk measurement method for multi-core fiber fan-in/fan-out devices utilizing the Fresnel reflection. Compared with the traditional method using core-to-core coupling between a multi-core fiber and a single-mode fiber, the proposed method has the advantages of high reliability and much shorter measurement time. Statistical properties of the measured crosstalk by the new method are found to be very similar to the ones by the traditional coupling method.