Apparatus and method for adjusting optical axis for optical wireless communication in free space

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United States of America Patent

PATENT NO 11454770
APP PUB NO 20210063656A1
SERIAL NO

17002391

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Abstract

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Provided are an apparatus and method for adjusting an optical axis. In the apparatus, an iris diaphragm and a quadrant photodiode (QPD) are used to align optical axes of an optical system of the apparatus so that optical transmission efficiency between an optical transmitter and an optical receiver can be increased. Since a hole of the iris diaphragm can be adjusted to be small, a beam larger than a light-receiving area of the QPD can be included in the light-receiving area, and optical axis alignment is facilitated accordingly. When the QPD and the iris diaphragm are applied to the apparatus, it is possible to simultaneously perform data transmission, tracking, and optical axis alignment. An optical fiber end surface and optical axes of lenses arranged in parallel are aligned in the apparatus so that alignment between two terminals can be easy and reception efficiency can be increased.

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Patent Owner(s)

Patent OwnerAddress
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE218 GAJEONG-RO YUSEONG-GU DAEJEON 34129

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heo, Young Soon Gwangju, KR 36 123
Kang, Hyun Seo Gwangju, KR 66 341
Kim, Jeong Eun Gwangju, KR 65 335
Kim, Keo Sik Gwangju, KR 19 65
Kim, Kye Eun Naju, KR 6 3
Kim, Sung Chang Gwangju, KR 48 209
Lee, Mun Seob Daejeon, KR 29 257
Min, Gi Hyeon Gwangju, KR 14 11
Park, Hyoung Jun Gwangju, KR 29 124
Park, Si Woong Gwangju, KR 10 8
Ryu, Ji Hyoung Jeonju, KR 24 50
Son, Dong Hoon Gwangju, KR 13 17
Yeo, Chan Il Gwangju, KR 19 37

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