Comparative Study on Mode-Selection and Tuning Principle of Several Birefringent Filters

Bireftingent filters play an important role in many fields such as laser technology, etc. This paper describes the mode-selection and tuning principle of several sets of new birefringent filters. Including PBS-HWP combination, PBS-QW combination, PBS-LN crystal combination and PBS-QWPs combination. The advantages and disadvantages of these bireftingent filters are analyzed, mainly about the convenience and laser structure, which are in good agreement with experiment results.