The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2009
Filed:
May. 28, 2008
Hiroshi Ishikawa, Tsukuba, JP;
Toshifumi Hasama, Tsukuba, JP;
Masahiko Mori, Tsukuba, JP;
Hisato Uetsuka, Hitachi, JP;
Hiroshi Ishikawa, Tsukuba, JP;
Toshifumi Hasama, Tsukuba, JP;
Masahiko Mori, Tsukuba, JP;
Hisato Uetsuka, Hitachi, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Abstract
A waveguide type wavelength domain optical switch includes an input/output port including at least three waveguide spectrometers stacked in thickness direction, a first lens for collecting light outputted from an input port of the input/output port in one axis direction, a second lens for collecting light outputted from the first lens in a direction orthogonal to the collecting direction of the first lens, and an optical phase modulation cell for reflecting light outputted from the second lens through the second lens and the first lens to an output port of the input/output port. Alternatively, the input/output port may include at least two waveguide spectrometers and a waveguide optical coupler circuit stacked in thickness direction.