公开(公告)号：US09804327B1

公开(公告)日：2017-10-31

申请号：US15466405

申请日：2017-03-22

Applicant: Electronics and Telecommunications Research Institute

Inventor： Heuk Park ,  Sae Kyoung Kang ,  Hwan Seok Chung

IPC: G02B6/12 ,  G02B27/00 ,  H04J14/02

CPC classification number: G02B6/12011 ,  G02B6/12016 ,  H04J14/02

Abstract: Provided is a phase error compensating apparatus. The phase error compensating apparatus may include a waveguide array disposed between a first free propagation region and a second free propagation region and configured to allow a light signal passed through the first free propagation region to move toward the second free propagation region, in which a length of each of the waveguides included in the waveguide array may be adjusted to compensate for a phase error of light signals passed through the waveguides.

公开(公告)号：US09900991B2

公开(公告)日：2018-02-20

申请号：US15263498

申请日：2016-09-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sae Kyoung Kang ,  Heuk Park ,  Hwan Seok Chung

IPC: H05K1/00 ,  H05K1/18 ,  H05K1/02 ,  H05K1/11 ,  H05K3/28 ,  H05K3/34

CPC classification number: H05K1/189 ,  H05K1/025 ,  H05K1/116 ,  H05K3/28 ,  H05K3/3447 ,  H05K2201/10121

Abstract: A flexible printed circuit board (FPCB) for an optical module includes: a signal via pad connected with a signal lead pin of the optical module; a ground layer spaced apart from the signal via pad; an isolation gap formed between the signal via pad and the ground layer; and a protective layer which is formed at a portion that comprises the isolation gap, and which, when connected with the signal via pad, compensates for parasitic inductance caused by a protruding signal lead pin.

公开(公告)号：US12166531B2

公开(公告)日：2024-12-10

申请号：US18096638

申请日：2023-01-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joon Young Huh ,  Sae Kyoung Kang ,  Hun Sik Kang ,  Sang Rok Moon ,  Joon Ki Lee

IPC: H04B10/00 ,  H04B10/572 ,  H04B10/58 ,  H04J14/00

Abstract: Disclosed herein is an optical transmitter for generating a vestigial sideband (VSB) optical signal. The optical transmitter includes: a modulator configured based on a photonic integrated chip (PIC); an optical fiber block; and a lensed thin film filter implemented between the modulator configured based on the PIC and the optical fiber block. The PIC includes at least one grating coupler, and the lensed thin film filter is disposed so that an angle of an optical signal emitted from a first grating coupler of the PIC coincides with an angle of incident (AOI) of the lensed thin film filter to design the first grating coupler and the lensed thin film filter.

公开(公告)号：US10432341B2

公开(公告)日：2019-10-01

申请号：US16033330

申请日：2018-07-12

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sae Kyoung Kang ,  Joon Ki Lee ,  Joon Young Huh

IPC: H04B10/077 ,  H04B11/00 ,  H04J14/02 ,  H04Q11/00

Abstract: A transmitter for transmitting an optical signal in an optical communication system includes a plurality of light sources configured to output optical signals; a plurality of first optical couplers configured to multiplex the optical signals, which are output from the plurality of light sources, to generate a first optical signal, and output the first optical signal through a first output port and a second output port of each of the plurality of first optical couplers; a first monitoring unit configured to monitor the first optical signal which is output through the second output port of each of the plurality of first optical couplers; and a controller configured to control an optical output of each of the plurality of light sources on the basis of a result of the monitoring.

公开(公告)号：US09804346B2

公开(公告)日：2017-10-31

申请号：US15010657

申请日：2016-01-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sae Kyoung Kang ,  Joon Ki Lee ,  Joon Young Huh ,  Jie Hyun Lee

IPC: G02B6/32 ,  G02B6/42 ,  G02B6/293

CPC classification number: G02B6/4206 ,  G02B6/29365 ,  G02B6/2938 ,  G02B6/32 ,  G02B6/4208 ,  G02B6/421 ,  G02B6/4215 ,  G02B6/4244 ,  G02B6/4249 ,  G02B6/4265 ,  G02B6/4292

Abstract: A receptacle-collimator assembly and a multi-wavelength optical receiver module. The receptacle-collimator assembly includes a receptacle configured to receive a wavelength-multiplexed optical signal; and a collimator integrated with the receptacle and configured to generate a collimated beam signal from a multi-wavelength optical signal received from the receptacle and output the beam signal.

公开(公告)号：US09755751B2

公开(公告)日：2017-09-05

申请号：US15016952

申请日：2016-02-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joon Young Huh ,  Jong Hyun Lee ,  Jyung Chan Lee ,  Joon Ki Lee ,  Sae Kyoung Kang

IPC: H04B10/00 ,  H04B10/04 ,  H04B10/40 ,  H04L27/00 ,  H04L7/00 ,  H04L7/033 ,  H04B10/516 ,  H04B10/60 ,  H04L27/02 ,  H04L27/20

CPC classification number: H04B10/40 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/60 ,  H04B10/69 ,  H04L7/0075 ,  H04L7/0331 ,  H04L7/0334 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/02 ,  H04L27/2067

Abstract: An optical transceiver of a flexible modulation format. The optical transceiver may include an optical transmitter to convert an electrical signal to an optical signal and transmit the optical signal, an optical receiver to receive and convert the optical signal to an electrical signal, and a controller to set modulation formats of the optical transmitter and the optical receivers according to modulation format information.