OPTICAL ELEMENT, LASER MODULE, RETINAL PROJECTION DEVICE, AND NEAR-EYE WEARABLE DEVICE

Abstract: a mode converter of an optical element includes a taper section having a length in a second direction increases from a first length, at which a first effective refractive index of a tm0 mode is higher than a second effective refractive index of a te1 mode, to a second length, at which the first effective refractive index is lower than the second effective refractive index. lengths of a first line section and a second line section in the second direction are set such that a magnitude relationship between the second effective refractive index in the first line section and a third effective refractive index of the te0 mode in the second line section at a position is inverted to a magnitude relationship between the second effective refractive index in the first line section and the third effective refractive index in the second line section at a second incident end.

Inventor(s): Atsushi SHIMURA, Yasuhiro TAKAGI, Hiroki HARA

CPC Classification: G02F1/0353 (based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect ( takes precedence))

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