Abstract: The signal output expression for the fiber optic pulse magnetic field sensor based on the Faraday effect is deduced by the Jones matrix. The influence of linear birefringence on measurement accuracy is analyzed. The theoretical description is used to develop practically applicable methods of eliminating the temperature and vibration drift caused by the linear birefringence in the Faraday material. The temperature drift caused by the circular birefringence in the Faraday material is avoided. Accuracies of up to 0.15% error over a temperature range from -20℃~60℃ have been achieved.

Key words: Faraday effect, pulse magnetic field, fiber optic sensing, stability