公开(公告)号：US20250007613A1

公开(公告)日：2025-01-02

申请号：US18697806

申请日：2021-11-15

Applicant: NEC Corporation

Inventor： Taro Kaneko ,  Shigeru Mieda ,  Masaki Oe ,  Yuuji Minota ,  Naoki Kobayashi ,  Rintaro Nomura ,  Kimiyoshi Fukatsu

IPC: H04B10/40 ,  G02B6/42

Abstract: The optical transmission module provided is designed to be simpler, smaller, and faster. It consists of a housing that holds one or more stacked substrates, partially exposed. Inside the housing, there is a light emitter that generates optical signals and an optical functional element that processes the transmission signal for driving the light emitter. Multiple terminals extend from the inside to the outside of the housing on the substrates. The terminals are divided into two groups: the first group connects to electrodes of a high-frequency circuit in the optical functional element, and the second group connects to electrodes of a low-frequency circuit. The length between the upper surfaces of the first group terminals and the high-frequency circuit electrodes is shorter than the length between the upper surfaces of the second group terminals and the low-frequency circuit electrodes, in the direction perpendicular to the substrates' major surface.

公开(公告)号：US20230383925A1

公开(公告)日：2023-11-30

申请号：US18122595

申请日：2023-03-16

Applicant: NEC Corporation

Inventor： Shigeru Mieda ,  Isao Tomita

IPC: F21V7/00 ,  F21V19/00

CPC classification number: F21V7/0033 ,  F21V19/006

Abstract: To provide an optical module that can further be reduced in size, an optical module according to the present invention includes a casing, a light source that is mounted on a first surface of the casing and outputs light, a first reflection means that is arranged at a position facing the light source and reflects the light from the light source to a direction vertical to the first surface, a second reflection means that reflects the light from the first reflection means to a direction parallel to an output direction of the light from the light source, and a transmission means that transmits the light from the second reflection means.

公开(公告)号：US20240413606A1

公开(公告)日：2024-12-12

申请号：US18699910

申请日：2021-11-09

Applicant: NEC Corporation

Inventor： Kenji MIZUTANI ,  Masaki Oe ,  Shigeru Mieda

IPC: H01S5/06 ,  H01S5/00 ,  H01S5/0687

Abstract: In order to enable oscillation of transmission light at any oscillation frequency even in an environment in which an environmental temperature varies significantly from an assumed temperature, a control device for a light source including a wavelength variable filter includes a temperature reception means for receiving substrate temperature information being information indicating a substrate temperature being a temperature of a substrate on which the light source is provided, and housing temperature information being information indicating a housing temperature being a temperature of a housing containing the substrate; and a control means for controlling, based on the substrate temperature information and the housing temperature information, the substrate temperature and a refractive index of the wavelength variable filter in such a way that a frequency of transmission light being output by the light source becomes a desired frequency.