公开(公告)号：US20230283375A1

公开(公告)日：2023-09-07

申请号：US18081789

申请日：2022-12-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Minhyup SONG ,  Hyun Jong CHOI ,  Minje SONG ,  Gyu Dong CHOI ,  Taehyun LEE ,  SEUNGYOUNG LIM

IPC: H04B10/2575 ,  H04B10/548

CPC classification number: H04B10/2575 ,  H04B10/548

Abstract: Disclosed are a photonic multiband filter and a method of operating the same. The photonic multiband filter includes an optical frequency comb that forms multiple optical channels based on a single light source incident from an outside, a modulator that applies an RF signal modulated into an optical domain among a plurality of RF signals to the multiple optical channels, and a pulse shaper that determines a center frequency, a bandwidth, and a passband shape of the RF signal modulated into the optical domain including the multiple optical channels.

公开(公告)号：US20190379459A1

公开(公告)日：2019-12-12

申请号：US16439294

申请日：2019-06-12

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sungil KIM ,  Jung Min PARK ,  Minje SONG ,  minhyup SONG ,  Jae-Sik SIM ,  Joon Tae AHN

IPC: H04B10/508 ,  H04L25/03 ,  H04B10/564

Abstract: An embodiment of the inventive concept includes an optical signal generating circuit, a controlling circuit, a waveform shaping circuit, and an output circuit. The optical signal generating circuit generates a first optical signal including pulses. The controlling circuit generates a control signal indicating a first pulse to be attenuated in magnitude among the pulses. The waveform shaping circuit attenuates a magnitude of the first pulse based on the control signal and the first optical signal, and generates a second optical signal including pulses corresponding to the pulses included in the first optical signal and the first pulse having the attenuated magnitude. The output circuit outputs an electric signal of bands corresponding to differences between frequencies of the pulses included in the second optical signal based on the second optical signal. A band corresponding to the first pulse among the bands of the electric signal is adjusted as the magnitude of the first pulse is attenuated.

公开(公告)号：US20240337897A1

公开(公告)日：2024-10-10

申请号：US18624945

申请日：2024-04-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joon Tae AHN ,  Minje SONG ,  Minhyup SONG ,  Taehyun LEE ,  Seungyoung LIM ,  Young Jin JUNG ,  Gyu Dong CHOI

IPC: G02F1/35 ,  H01S3/00

CPC classification number: G02F1/353 ,  H01S3/0057 ,  H01S3/0085 ,  G02F2203/56

Abstract: Disclosed is an optical pulse adjusting device including a pulse shaper that receives an input signal generated based on an optical frequency comb (OFC) signal and outputs a spectrum adjustment signal by adjusting an optical spectrum shape of the input signal, an optical amplifier that outputs an optical amplification signal by amplifying the spectrum adjustment signal, an optical spectrum analyzer (OSA) that outputs an information signal by comparing an optical spectrum shape of the optical amplification signal with a target optical spectrum shape, and a control circuit that outputs a comparison signal based on the information signal. The pulse shaper further receives the comparison signal and adjusts the optical spectrum shape of the input signal based on information about a difference between the optical spectrum shape of the optical amplification signal and the target optical spectrum shape, which is included in the comparison signal.