Sk Telecom Company, Ltd.

Solid, Inc.

Lightron Inc.

Lightron Fiber-Optic Devices Inc.

Jongyeong Lim

Taehyeong Kim

Jongsin Kim

Jinsoo Sung

Eunho Lee

Jinsoo Choi

Kangyong Jung

Jaehyun Jin

Wolyon Hwang

Youngjoon Yoo

Youngun Heo

Sangsu Park

Hongman Kim

Yoonkoo Kwon

Disclosed is an optical network system including a upper network equipment, a lower network equipment, and a plurality of transfer network equipments connecting the upper network equipment and the lower network equipment through independent optical links, wherein the lower network equipment performs switching such that transmission and reception of an optical signal are performed through an optical link of a standby line when a failure occurs in at least one of an optical link used as a working line, an optical interface device associated with the working line in the upper network equipment, and a transfer network equipment associated with the working line.

Optical network system

A bi-directional optical transceiver module includes: an optical transmission unit to output a transmission signal; an optical reception unit to receive a reception signal, the transmission signal and the reception signal having different corresponding first and second wavelength values within a single channel; a splitter, inclined with respect to an incident direction of the transmission signal output from the optical transmission unit, to transmit the transmission signal to an outside, and reflect optical signals input from the outside, the optical signals including the reception signal; and a reflected light-blocking optical filter unit to pass, as the reception signal among the optical signals reflected by the splitter, an optical signal within a preset wavelength range including the second wavelength value.

Bi-directional optical transceiver module

Growing community of inventors

Goyang-si, South Korea

Jongyeong Lim