Patents Assigned to Luxpert Technologies Co., Ltd.
  • Patent number: 8254784
    Abstract: The present disclosure is directed to a light source distributor for use in an injection-locked WDM-PON (wavelength division multiplexed-passive optical network). The light source distributor receives an A band and a B band injection optical signals through a single optical terminal from an injection light source for outputting both the A band and the B band injection optical signals; transmits the A band injection optical signal to a first optical multiplexer/demultiplexer of a central office and the B band injection signal to a second optical multiplexer/demultiplexer of a remote node; transmits a wavelength-locked A band optical signal received from the first optical multiplexer/demultiplexer to the second optical multiplexer/demultiplexer; and transmits a wavelength-locked B band optical signal received from the second optical multiplexer/demultiplexer to the first optical multiplexer/demultiplexer.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: August 28, 2012
    Assignee: Luxpert Technologies Co., Ltd.
    Inventors: Jae Oh Byun, Ji Min Seo
  • Patent number: 8139955
    Abstract: The present disclosure relates to a WDM-PON optical transmitter; and, more particularly, to a system for controlling a driving current of the WDM-PON optical transmitter. The present disclosure provides a driving current control system of an optical transmitter for use in WDM-PON including a plurality of optical transmitters, each transmitter generating and transmitting a transmittance optical signal based on a driving current and an optical multiplexer/demultiplexer for combining the optical signals received from the plurality of the optical transmitters to output a combined optical signal through a single common terminal, wherein the driving current is controlled based on the combined optical signal outputted from the common terminal.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: March 20, 2012
    Assignee: Luxpert Technologies Co., Ltd.
    Inventors: Jae Oh Byun, Kyoung Min Kim
  • Patent number: 8073341
    Abstract: The present disclosure relates to a WDM-PON (wavelength division multiplexed-passive optical network) optical transmitter; and, more particularly, to a system for controlling driving current of the WDM-PON optical transmitter. The present disclosure provides a driving current control method of the optical transmitter for in use in the WDM-PON, including: setting an attenuation value of a variable optical attenuator to X; detecting an optical power Px received by a monitoring photo diode of the optical transmitter; setting an attenuation value of the variable optical attenuator to Y; detecting an optical power Py received by the monitoring photo diode of the optical transmitter; calculating an optical power Pout of an optical signal outputted from a common terminal of a 1×N optical multiplexer/demultiplexer based on the detected optical power Px and Py; and controlling a driving current based on the calculated optical power Pout.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: December 6, 2011
    Assignee: Luxpert Technologies Co., Ltd.
    Inventors: Jae Oh Byun, Kyoung Min Kim
  • Patent number: 7796893
    Abstract: An optical bi-directional transceiver module is disclosed. The optical bi-directional transceiver module is suitable for an optical transmission/reception operation on the condition that an interval between two wavelength bands such as C and L bands is very narrow. The transceiver module manufactures a stable optical-communication light source based on the injection-mode-locked FP LD, such that an improved light source capable of substituting for the conventional high-quality DFB laser can be implemented. As a result, the light source for the WDM-PON system can be manufactured. The optical bi-directional transceiver module can be manufactured even when the light signal having a narrow interval between two wavelength bands is used, resulting in reduction of costs, size, and power consumption of the light source.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: September 14, 2010
    Assignees: Luxpert Technologies Co., Ltd., Package and Solution Inc.
    Inventors: Han-Jun Koh, Jae-Oh Byun
  • Publication number: 20100119232
    Abstract: The present disclosure is directed to a light source distributor for use in an injection-locked WDM-PON (wavelength division multiplexed-passive optical network). The light source distributor receives an A band and a B band injection optical signals through a single optical terminal from an injection light source for outputting both the A band and the B band injection optical signals; transmits the A band injection optical signal to a first optical multiplexer/demultiplexer of a central office and the B band injection signal to a second optical multiplexer/demultiplexer of a remote node; transmits a wavelength-locked A band optical signal received from the first optical multiplexer/demultiplexer to the second optical multiplexer/demultiplexer; and transmits a wavelength-locked B band optical signal received from the second optical multiplexer/demultiplexer to the first optical multiplexer/demultiplexer.
    Type: Application
    Filed: November 16, 2007
    Publication date: May 13, 2010
    Applicant: LUXPERT TECHNOLOGIES CO., LTD.
    Inventors: Jae Oh Byun, Ji Min Seo
  • Publication number: 20100067907
    Abstract: The present disclosure relates to a WDM-PON optical transmitter; and, more particularly, to a system for controlling a driving current of the WDM-PON optical transmitter. The present disclosure provides a driving current control system of an optical transmitter for use in WDM-PON including a plurality of optical transmitters, each transmitter generating and transmitting a transmittance optical signal based on a driving current and an optical multiplexer/demultiplexer for combining the optical signals received from the plurality of the optical transmitters to output a combined optical signal through a single common terminal, wherein the driving current is controlled based on the combined optical signal outputted from the common terminal.
    Type: Application
    Filed: March 24, 2009
    Publication date: March 18, 2010
    Applicant: LUXPERT TECHNOLOGIES CO., LTD.
    Inventors: Jae Oh Byun, Kyoung Min Kim
  • Publication number: 20100067921
    Abstract: The present disclosure relates to a WDM-PON (wavelength division multiplexed-passive optical network) optical transmitter; and, more particularly, to a system for controlling driving current of the WDM-PON optical transmitter. The present disclosure provides a driving current control method of the optical transmitter for in use in the WDM-PON, including: setting an attenuation value of a variable optical attenuator to X; detecting an optical power Px received by a monitoring photo diode of the optical transmitter; setting an attenuation value of the variable optical attenuator to Y; detecting an optical power Py received by the monitoring photo diode of the optical transmitter; calculating an optical power Pout of an optical signal outputted from a common terminal of a 1×N optical multiplexer/demultiplexer based on the detected optical power Px and Py; and controlling a driving current based on the calculated optical power Pout.
    Type: Application
    Filed: March 24, 2008
    Publication date: March 18, 2010
    Applicant: LUXPERT TECHNOLOGIES CO., LTD.
    Inventors: Jae Oh Byun, Kyoung Min Kim
  • Publication number: 20100067911
    Abstract: The invention is related to an injection light generator for use in a wavelength division multiplexed-passive optical network, which generates A-band injection light having a spectrum range separated into N wavelength ranges (N is a natural number equal to or greater than 2) to be used for a transmission of a downstream optical signal and B-band injection light having a spectrum range separated into N wavelength ranges to be used for a transmission of an upstream optical signal.
    Type: Application
    Filed: December 13, 2007
    Publication date: March 18, 2010
    Applicant: LUXPERT TECHNOLOGIES CO., LTD.
    Inventors: Jae Oh Byun, Kyoung Min Kim
  • Publication number: 20090180502
    Abstract: An injection seed of an injection locking type light source includes a broadband light source, a seed circulator receiving and transmitting a light from the light source to a seed optical filter passing only a desired wavelength band among the light beams from the light source and passing through the seed circulator, and an injection light source receiving a light beam of a specific wavelength band passing through the seed optical filter and outputting the wavelength-locked light beam without modulation to the seed optical filter at a predetermined power. The seed optical filter receives and outputs the wavelength-locked light beam from the injection light source to the seed circulator, and the seed circulator receives and outputs the wavelength-locked light beam as a seed beam. Since noise signal of a seed beam is small, noise signal of a final transmitting beam is also small and preferable for the high speed communication.
    Type: Application
    Filed: May 29, 2007
    Publication date: July 16, 2009
    Applicant: LUXPERT TECHNOLOGIES CO., LTD.
    Inventors: Jae-Oh Byun, Ji-Min Seo
  • Patent number: 7206124
    Abstract: Disclosed is a gain-providing optical power equalizer which can equalize optical channel output or gain while amplifying signal output. In prior art technologies, optical power equalization has been achieved by attenuating signal output differently depending upon optical channels. However, the optical power equalizer of the present invention is characterized in that it achieves equalization of optical power by giving optical gain differently depending upon optical channels. According to the present invention, the output of optical channels can be adjusted to be flat or as desired without deteriorating signal to noise ratio.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: April 17, 2007
    Assignee: Luxpert Technologies Co., Ltd.
    Inventors: Nam-Kyoo Park, Jung-Hoon Shin
  • Patent number: 7075708
    Abstract: The present invention relates to a waveguide amplifier which is comprised of silica or silica-related material co-doped with silicon nanoclusters and rare earth elements, and more particularly, to a waveguide amplifier with higher efficiency enhanced by top-pumping method and focusing means for pumping light. The waveguide amplifier of the present invention comprises of: (a) a substrate; (b) an optical waveguide including: a lower cladding layer formed on the substrate; a core layer which is made of silica or silica-related material co-doped with silicon nanoclusters and rare earth elements on the lower cladding layer and has a refractive index higher than that of the lower cladding; and an upper cladding layer formed on the core layer; and (c) a light source, spaced apart from the waveguide, for optically pumping the waveguide, wherein the waveguide amplifier operates by exciting the rare earth elements through electron-hole combinations in the silicon nanoclusters.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: July 11, 2006
    Assignee: Luxpert Technologies Co., Ltd.
    Inventors: Jung-Hoon Shin, Hak-Seung Han, Nam-Kyoo Park
  • Patent number: 7030419
    Abstract: Thin film for optical applications, light-emitting structure using the same and the fabrication method thereof are disclosed. The present invention provides a silica or silica-related thin film for optical applications in which silicon nanoclusters and rare earth elements are co-doped. The average size of the silicon nanoclusters is less than 3 nm and the concentration of the rare earth elements is less than 0.1 atomic %. The ratio of the rare earth element concentration to that of silicon nanoclusters is controlled to range from 1 to 10 in the thin film. The thin film emits light by exciting the rare earth elements through electron-hole recombinations in the silicon nanoclusters. According to the present invention, the conditions such as the size and concentration of the silicon nanoclusters, the concentration of the rare earth element, and their concentration ratio are specifically optimized to fabricate optical devices with better performance.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: April 18, 2006
    Assignee: Luxpert Technologies Co., Ltd.
    Inventors: Jung-Hoon Shin, Se-Young Seo, Hak-Seung Han