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Patent Agency Ranking
公开(公告)号：US10277008B1
公开(公告)日：2019-04-30
申请号：US15956187
申请日：2018-04-18
Inventor： Shinmo An
Abstract: Provided is a tunable laser device. The tunable laser device includes a lower clad layer, first to third quantum well patterns disposed on the lower clad layer and arranged in a first direction parallel to a top surface of the lower clad layer, an upper clad layer disposed on the first quantum well pattern, and first grating patterns disposed between the third quantum well pattern and the lower clad layer. The first to third quantum well patterns are arranged in the first direction parallel to a top surface of the lower clad layer, the upper clad layer includes a p-type conductive clad layer, the upper clad layer includes an n-type conductive clad layer, and the third quantum well pattern is electrically intrinsic. When a reverse bias is applied to the upper clad layer, the third quantum well pattern, and the lower clad layer, the third quantum well pattern is changed in refractive index.
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公开(公告)号：US10291327B1
公开(公告)日：2019-05-14
申请号：US15855825
申请日：2017-12-27
Inventor： O-Kyun Kwon , Namje Kim , Miran Park , Shinmo An , Won Seok Han
IPC: H04B10/07 , H04B10/40 , H04B10/50 , H04B10/54 , H04B10/60 , H04B10/077 , 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：US11165221B2
公开(公告)日：2021-11-02
申请号：US16532281
申请日：2019-08-05
Inventor： Shinmo An
IPC: H01S5/026 , G02F1/225 , G02F1/01 , H01S5/062 , G02F1/017 , H01S5/22 , H01S5/042 , H01S5/10 , G02F1/015
Abstract: Provided is an optical device including a radio frequency (RF) signal source configured to electrically provide an RF signal, a first diode configured to operate as a laser diode (LD) or an electro-absorption modulator (EAM) in response to the RF signal, a second diode configured to share an N region of the first diode, be serially connected to the first diode, and have a P region connected to a ground to operate as a capacitor for series push-pull operation with the first diode, and a resistor connected between the N region and the ground.
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公开(公告)号：US11018475B2
公开(公告)日：2021-05-25
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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公开(公告)号：US10985530B2
公开(公告)日：2021-04-20
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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