公开(公告)号：US20180316154A1

公开(公告)日：2018-11-01

申请号：US15935886

申请日：2018-03-26

Applicant: Fujitsu Optical Components Limited

Inventor： Tomonori Azuma ,  Kohei Shibata

IPC: H01S3/13 ,  G02B27/28 ,  H01S3/04 ,  G02B17/00

Abstract: A wavelength monitoring device includes a polarization rotation element; an etalon element that includes a first double refractive layer and a single refractive layer or a second double refractive layer that is disposed by rotating an optic axis of the second double refractive layer with respect to an optic axis of the first double refractive layer; a polarization separating element that separates an input light, which has the polarization direction rotated and is transmitted through the etalon element, into first light having a polarization direction parallel to the optic axis of the first double refractive layer and second light having a polarization direction perpendicular to the optic axis of the first double refractive layer; a first light receiving device that receives the first light to detect a first monitor value; and a second light receiving device that receives the second light to detect a second monitor value.

公开(公告)号：US11710914B2

公开(公告)日：2023-07-25

申请号：US16849474

申请日：2020-04-15

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Tomonori Azuma ,  Tetsuo Ishizaka ,  Koji Otsubo

IPC: G02B6/42 ,  H01R12/52 ,  H01R12/62

CPC classification number: H01R12/52 ,  G02B6/4269 ,  G02B6/4281 ,  H01R12/62

Abstract: An optical module includes: a first board having an optical component bonded thereto with an adhesive; a connection structure part rising from the first board and made of a material having lower thermal conductivity than thermal conductivity of a material of the first board; and a second board joined to the connection structure part.