Polarization element and optical device using polarization...

Details Polarization element and optical device using polarization... Polarization element and optical device using polarization...

2007-06-26

2007-06-26

Doan, Jennifer (Department: 2874)

Optical waveguides

Polarization without modulation

C359S483010

Reexamination Certificate

active

11433233

ABSTRACT:
A high performance polarization splitting element and an optical device using the polarization splitting element are provided. According to an embodiment of the present invention, the optical device includes a first periodic structure having a period shorter than a wavelength of used light, a second periodic structure which has a period shorter than the wavelength of the used light and in which a direction of the period is orthogonal to or substantially orthogonal to that of the first periodic structure, and a pair of optical elements disposed so as to sandwich the first periodic structure and the second periodic structure. The second periodic structure is adjacent to the first periodic structure. The first periodic structure and the second periodic structure transmit light having first polarization direction and reflect light having second polarization direction orthogonal to the first direction, and the second polarization direction is substantially parallel to one of the periodic direction of the first periodic structure and the periodic direction of the second periodic structure.

REFERENCES:
patent: 5042925 (1991-08-01), Broer et al.
patent: 5481636 (1996-01-01), Fukuda et al.
patent: 6384974 (2002-05-01), Joubert et al.
patent: 6947215 (2005-09-01), Hoshi
patent: 2001/0016247 (2001-08-01), Matsuura et al.
patent: 2003/0156325 (2003-08-01), Hoshi

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