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公开(公告)号：US20180292605A1
公开(公告)日：2018-10-11
申请号：US15870836
申请日：2018-01-12
Inventor： Shinmo AN
Abstract: Provided is a polarization controller. The polarization controller includes a substrate, a first core disposed on the substrate and having a rectangular parallelepiped shape, a first cladding layer configured to cover the first core and the substrate and including a groove parallel to the first core in an edge of an upper end thereof, and a metal pattern disposed in the groove and including a first side surface and a bottom surface, which are adjacent to the first core.
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公开(公告)号：US20190165863A1
公开(公告)日：2019-05-30
申请号：US15855825
申请日：2017-12-27
Inventor： O-Kyun KWON , Namje KIM , Miran PARK , Shinmo AN , Won Seok HAN
IPC: H04B10/54 , H04B10/2575
Abstract: An optical signal generating apparatus according to an embodiment of the inventive concept includes a first optical intensity modulator for modulating a first optical signal to generate a 2N-level (where N is a positive integer) second optical signal in the form of a binary signal, a first optical amplifier for amplifying the second optical signal to generate a third optical signal, and a second optical intensity modulator for modulating the third optical signal to generate a 2N+1-level fourth optical signal in the form of a binary signal. The optical signal generating apparatus according to an embodiment of the inventive concept may generate a low-cost, high-quality optical signal by using an optical device to generate a multi-level optical signal. Additionally, the optical signal generating apparatus according to an embodiment of the inventive concept may generate a multi-level optical signal by sequentially performing optical modulation and optical amplification operations.
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公开(公告)号：US20200212653A1
公开(公告)日：2020-07-02
申请号：US16539665
申请日：2019-08-13
Inventor： O-Kyun KWON , namje KIM , Miran PARK , Tae-Soo KIM , Shinmo AN , Won Seok HAN
Abstract: Provided is a tunable semiconductor laser including an active gain region in which an optical signal is generated according to a modulation signal, a mode control region in which a resonant mode is controlled according to a mode control signal, and a signal chirp of the optical signal is compensated according to a first compensation signal determined based on the modulation signal, and a distributed Bragg reflector (DBR) region in which an oscillation wavelength of the optical signal is determined based on a wavelength selection signal for the optical signal, a second compensation signal for compensating for a thermal chirp of the optical signal on a basis of the modulation signal, and a heater signal provided to a heater electrode.
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公开(公告)号：US20200212652A1
公开(公告)日：2020-07-02
申请号：US16561420
申请日：2019-09-05
Inventor： Namje KIM , O-Kyun KWON , Miran PARK , Tae-Soo KIM , Shinmo AN , Won Seok HAN
Abstract: Provided is a quarter-wavelength shifted distributed feedback laser diode. The laser diode includes a substrate having a laser diode section and a phase adjustment section, a waveguide layer on the substrate, a clad layer on the waveguide layer, a grating disposed in the clad layer in the laser diode section, an anti-reflection coating disposed on one side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the laser diode section, and a high reflection coating disposed on the other side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the phase adjustment section.
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