Electronics and Telecommunications Research Institute

Jong Bae Kim

Min Su Kim

Jung Jin Ju

Byeong Ha Lee

Goo Young Park

Hyeong Cheol Oh

Provided is a method for determining the optimal resonant length, among a large number of local resonant lengths which satisfy a resonant condition, that maximizes wave intensity in a resonant structure. In the second harmonic generation or the cascaded difference frequency generation device using the resonant structure by which the second harmonic wave of a pump wave resonates, the optimal resonant length is determined so that the intensity of an optical wave is maximized. The intensity distribution of the optical wave is defined, according to the resonant feedback condition or the no-resonant feedback condition, as a function of the resonant lengths to determine the optimal resonant length.

Method for determining optimal resonant length to maximize wave intensity in resonant structure

Provided is a resonant cascaded difference frequency generator that is capable of improving the conversion efficiency of the second-order nonlinear optical phenomena by resonating the second harmonic wave of a pump light. The resonant cascaded difference frequency generator includes: a nonlinear medium, which receives a pump light and a signal light and then generates the second harmonic wave of the pump light through second harmonic generation, in a cascaded way generates a converted light of a difference frequency through difference frequency generation between the signal light and the second harmonic wave; and a resonant structure that resonates the second harmonic wave of the pump light on the basis of the nonlinear medium.

Cascaded difference frequency generator using resonant structure

The present invention relates to a method of determining a quasi-phase matching efficiency in a periodically poled structure of an optical waveguide, a periodically poled structure of an optical waveguide, and an optical waveguide using the same. It is possible to effectively perform a quasi-phase matching when a width of periodic electrodes is shorter than a coherence length generally used as &#xbd; of a quasi-phase matching period.

Method of determining quasi-phase matching efficiency in periodically poled structure of optical waveguide, periodically poled structure of optical waveguide, and optical waveguide using the same

The present invention provides a method of implementing random number generators, which makes efficient hardware implementations possible, in a way of converting the multiplication and addition operations and the modulo operations into a series of addition operations.

Growing community of inventors

Daejeon, South Korea

Jong Bae Kim