Jong Hoi Kim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: It is necessary to use the continuous wave (CW) light and the optical input signal in the same direction in order to improve the conversion speed. Furthermore, in order to simplify the configuration of the optical transmission system including wavelength converters, the function capable of separating or removing the optical input signal should be included. Filter-free wavelength converters for separating and rejecting the optical input signal are being developed using the multimode interference semiconductor optical amplifier (MMI-SOA). The gain or phase modulation of the CW light is caused in the MMI-SOA. Furthermore, the CW light and the optical input signal are separated in the MMI-SOA in which the output port depends on the input port. Therefore, no optical filter is required for rejecting the optical input signal, and it is possible to converse to the same wavelength.
December 31, 2002
August 14, 2003
Jong Hoi Kim, Kwang Ryong Oh, Yong Soon Baek, Hyun Soo Kim, Kang Ho Kim
Abstract: Disclosed is a method for the fabrication of a spot-size converter with a lateral-tapered waveguide (or an active layer), which utilizes a mask during a lithographic process wherein the mask has a pad that can absorb strain to be occurred during forming a lateral-tapered waveguide pattern at its distal end and the lateral-tapered waveguide is fabricated by forming the distal end on the order of about 0.6 &mgr;m in width followed by forming the lateral-tapered waveguide on the order of 0.1 &mgr;m using an wet etching. Thus, it is possible to reduce a fabrication cost because it is free from a high-resolution electron beam lithography and a stepper, and hence enhance a reproducibility of the lateral-tapered waveguide because it is free from an excessive wet etching during the use of a contact exposure equipment.
August 10, 2001
July 4, 2002
Kyung-Hyun Park, Jong-Hoi Kim, Yong-Soon Baek, Moon-Ho Park, Sung-Bock Kim, Kwang-Ryong Oh