Quartz-silica Depolarizer (optics)

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quartz-silica wedge depolarizer


the quartz-silica wedge depolarizer common commercial design , similar cornu depolarizer, however, angle between 2 components smaller (2° typical) , first component birefringent. second component made of fused silica, has similar refractive index quartz, not birefringent. fast axis of quartz element @ 45° wedge. whole device more compact cornu depolarizer (for same aperture).


as cornu depolarizer, there separation of output function of polarization, beam deviation due imperfect match in refractive index between quartz , silica. output periodic across depolarizer. because wedge angle smaller in cornu depolarizer period larger, around 6 mm. depolarizer has preferred orientation because of single defined fast axis. in commercial wedge depolarizers marked.







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