Gap Lyu Phones & Addresses
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Irvine, CA
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Orange, CA
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9 Festivo, Irvine, CA 92606
Work
Position:
Professional/Technical
Education
Degree:
High school graduate or higher
Emails
g***u@altavista.com
Business Records
Name / Title
Company / Classification
Phones & Addresses
President, Principal
RAYBIT SYSTEMS, INC
Business Services · Services-Misc
Business Services · Services-Misc
1740_E Garry Ave #114, Santa Ana, CA 92705
1740 E Garry Ave, Santa Ana, CA 92705
1740 E Garry Ave, Santa Ana, CA 92705
Publications
Us Patents
Apparatus And Method For Controlling Optical Power And Extinction Ratio
View pageUS Patent:
7512166, Mar 31, 2009
Filed:
Dec 1, 2006
Appl. No.:
11/565768
Inventors:
Gap Youl Lyu - Irvine CA, US
Kilhun Koo - Irvine CA, US
Min Hee Kang - Irvine CA, US
Kilhun Koo - Irvine CA, US
Min Hee Kang - Irvine CA, US
Assignee:
Raybit Systems - Santa Ana CA
International Classification:
H01S 3/00
US Classification:
372 381, 372 3802, 372 3807
Abstract:
The present invention relates to an optical power and extinction ratio controlling device and method. An optical signal output from a light source is detected and optical power and extinction ratio of the light source are controlled. In detail, a feedback signal is provided to the light source to automatically control the bias current based on a DC signal output by a photodetector detecting the optical signal. Therefore, the optical output of the light source is maintained. Also, an optical signal output by the photodetector is converted into a predetermined times DC signal, and a feedback signal is provided to the light source to automatically control the modulation current based on the DC signal. Therefore, the extinction ratio of the light source is maintained. As a result, the extinction ratio is automatically maintained to satisfy the change of condition and the characteristic of light source, thereby maintaining quality optical outputs.
Apparatus For Detecting Wavelength And Measuring Optical Power
View pageUS Patent:
7619727, Nov 17, 2009
Filed:
Jun 7, 2006
Appl. No.:
11/447952
Inventors:
Gap Youl Lyu - Irvine CA, US
Kilhun Koo - Northridge CA, US
Min Hee Kang - Irvine CA, US
Ba Cao - Simi Valley CA, US
Kilhun Koo - Northridge CA, US
Min Hee Kang - Irvine CA, US
Ba Cao - Simi Valley CA, US
Assignee:
Raybit Systems Inc. - Santa Ana CA
International Classification:
G01J 1/42
US Classification:
356218, 356221, 356226
Abstract:
The present invention relates to a light wavelength and intensity measuring device. The device automatically measures a center wavelength of the light source and an intensity of the light corresponding to the center wavelength by using a main photodetector, at least one optical filter, and at least one sub photodetector when the light source is connected to the device. The main photodetector detects the intensity of the light applied by the light source, the optical filter transmits the light corresponding to a prediscriminated transmission wavelength, and the sub photodetector detects the intensity of the light transmitted through the optical filter. Therefore, the light intensity is more accurately measured by calibrating the intensity according to the wavelength.
Optical Signal Detector
View pageUS Patent:
7986886, Jul 26, 2011
Filed:
Jul 25, 2008
Appl. No.:
12/179851
Inventors:
Chan Yong Park - Gwangju-si, KR
Gap Youl Lyu - Irvine CA, US
Kil Hun Koo - Northridge CA, US
Min Hee Kang - Irvine CA, US
Gap Youl Lyu - Irvine CA, US
Kil Hun Koo - Northridge CA, US
Min Hee Kang - Irvine CA, US
Assignee:
Wooriro Optical Telecom Co., Ltd. - Gwangju
International Classification:
H04B 10/08
H04B 10/06
H04B 10/06
US Classification:
398210, 398 33, 398202
Abstract:
An optical signal detector is provided that detects an optical signal from an optical source using a plurality of optical sensors having different wavelength selectivities, thereby determining the peak wavelength of the optical signal and measuring the power of an optical signal corresponding to the peak wavelength. According to the optical signal detector, separate optical filters are not required and space and costs attributable to the installation of the optical filters can be saved, and thus there are effects in that the overall size and manufacturing costs of the device can be reduced.