公开(公告)号：US20190113684A1

公开(公告)日：2019-04-18

申请号：US16090367

申请日：2017-03-24

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Hara TOKUTAKA ,  Ryo SHIMIZU

IPC: G02B6/27 ,  G02B6/30 ,  G02B6/32 ,  G02B6/34

CPC classification number: G02B6/272 ,  G02B6/30 ,  G02B6/32 ,  G02B6/34 ,  G02F1/035

Abstract: There is provided an integration-type optical modulation device which performs polarization-beam-combining on two linearly polarized light beams respectively output from a plurality of optical modulation elements and outputs the resultant beam so as to seek an improvement and stabilization of optical characteristics, miniaturization, and low cost. The optical modulation device includes: first and second optical modulation elements 102a and 120b that are disposed to output output light beams side by side and respectively output the two output light beams; first and second optical path shift elements 108a and 108b that respectively shift optical paths of the two output light beams from the first optical modulation element and optical paths of the two output light beams from the second optical modulation element in first and second directions; and first and second polarization beam combining elements 110a and 110b that respectively combine the two output light beams after passing through the first and second optical path shift elements into one beam and outputs the one beam, in which the first optical path shift element and the second optical path shift element are integrally formed as one optical component.

公开(公告)号：US20180095302A1

公开(公告)日：2018-04-05

申请号：US15719583

申请日：2017-09-29

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Kei KATO ,  Norikazu MIYAZAKI ,  Ryo SHIMIZU

IPC: G02F1/01

CPC classification number: G02F1/0102 ,  G02F1/011 ,  G02F2201/12

Abstract: Provided is an optical modulator module in which a modulation substrate having a plurality of optical modulation units is stored inside a package case. The optical modulator module includes a plurality of signal supply lines configured to supply a modulation signal to the optical modulation unit through a connector terminal which is introduced into the package case. At least two or more of the plurality of signal supply lines are set such that the signal supply lines have overall electrical lengths which are different from each other. A particular part of the signal supply line employs at least one of the following configurations (a) and (b): (a) setting the signal supply line having a longer overall electrical length to have a wider cross-sectional area of a surface perpendicular to a direction in which the modulation signal propagates; and (b) setting a cross-sectional area of the particular part to be wider than cross-sectional areas of parts other than the particular part and setting the signal supply line having a longer overall electrical length to have the particular part increased in length.

公开(公告)号：US20190113683A1

公开(公告)日：2019-04-18

申请号：US16090329

申请日：2017-03-24

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Hara TOKUTAKA ,  Ryo SHIMIZU

IPC: G02B6/27 ,  G02B6/30 ,  G02B6/32

Abstract: There is provided an integration-type optical modulation device which performs polarization-beam-combining on two linearly polarized light beams respectively output from a plurality of optical modulation elements and outputs the resultant beam so as to seek an improvement and stabilization of optical characteristics, miniaturization, and low cost. The optical modulation device includes: two optical modulation elements (120a and the like) that respectively output two output light beams; four lenses (140a and the like) that respectively receive the four output light beams output from the optical modulation elements; a polarization rotation element (108) that together rotates polarization direction of respective ones of the respective two output light beams output from the two optical modulation elements; and two polarization beam combining elements (110a and 110b) that respectively combine the two output light beams respectively output from the two optical modulation elements into one beam and output the one beam, in which the light beams respectively output from the four lenses are directly input to the polarization rotation element and/or the two polarization beam combining elements without passing through an optical path shift prism.

公开(公告)号：US20190098744A1

公开(公告)日：2019-03-28

申请号：US16086320

申请日：2016-09-15

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Norikazu MIYAZAKI ,  Ryo SHIMIZU ,  Toru SUGAMATA

IPC: H05K1/02 ,  H01R12/62 ,  H01R12/67 ,  H05K1/11 ,  G02F1/225

Abstract: An optical modulator with FPC and optical transmission device using the same are provided. This optical modulator includes a flexible printed circuit which electrically connects the optical modulator to a circuit board. The flexible printed circuit has a substantially quadrilateral shape. A pad is formed on the flexible printed circuit along one side of the substantially quadrilateral shape so as to be electrically connected to the circuit board. In order to release the mechanical stress applied onto the side or the end portion of the flexible printed circuit and/or to prevent propagation of distortion generated in the side or the end portion, the flexible printed circuit has: a cutout or a notch provided in a direction from a part of at least one side toward the inside of the flexible printed circuit; and/or a curved portion connecting at least two adjacent sides.

公开(公告)号：US20190004249A1

公开(公告)日：2019-01-03

申请号：US15555587

申请日：2016-09-16

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Tokutaka HARA ,  Ryo SHIMIZU

IPC: G02B6/30 ,  G02B6/27

Abstract: To realize additional improvement and stabilization of optical characteristics, miniaturization, and low cost in an integration-type optical modulation device that includes a plurality of optical modulation elements, combines two modulated and linearly polarized light beams emitted from each of the modulation elements into one light beam. The optical modulation device includes two optical modulation elements (120a and 120b) each of which outputs two linearly polarized light beams; and four lenses (140a and the like) which respectively receive four linearly polarized light beams output from the two optical modulation elements. A distance between the two linearly polarized light beams which are output from one of the optical modulation elements and respectively pass through two of the lenses, and the two linearly polarized light beams which are output from the other optical modulation element and respectively pass through two of the lenses is set to gradually increase along a propagation direction.