One of the common applications of optical fiber coils is optical gyroscope in which optical fiber has tiny cross-section (order of 100 micro meters). Accordingly, with such characteristics, it is required to maintain tension forces applied to fiber during winding process within very low limits. This paper proposes tension sensor and control structure to achieve high precision of fiber tension during winding process. The advantage of the proposed structure of tension sensing and control mechanism is to relax the control objective. Hence, the proposed mechanism allows the use of high torque motors with slow dynamics and large time constant (required for driving large inertia supply spool), yet achieve high transient performance. In this paper, the proposed tension sensing and control mechanism is introduced, its mathematical model is developed and model accuracy is discussed. A conventional PID controller is introduced in tension control loop to verify the developed model transient performance. The simulation results are presented. The results show the validity of the proposed mechanism and it mathematical model.