Fiber optic position sensors utilize light transmitted through optical fibers to determine the position or displacement of an object. Understanding these devices will. Here, we report an affordable objective-lens-free, fiber-based position detection scheme with 2 nm spatial resolution and 150 MHz bandwidth. This fiber based detection mechanism enables simultaneous trapping and force measurements in a compact fiber optical tweezers system. 0 has led to an increasing demand for high-performance, reliable, and versatile sensors to optimize the efficiency and. Among the reasons why optical fibers are such an attractive are their low loss, high bandwidth, immunity to electromagnetic interference (EMI), small size, light weight, safety, relatively low cost, low maintenance, etc.