Samsung Electronics Co., Ltd.

Other

Korea Institute of Science and Technology

Bong Kyu Kim

June-Hee Lee

Myung Sup Jung

Young Min Jhon

Byoung Yoon Kim

Sang Kuk Kim

Bong Seok Moon

Yong Young Park

Wang Joo Lee

Myong Wook Kim

Sung Kyung Jung

Jae Chol Lee

A baseband IC for performing digital communication with an RFIC and a device including the same. The baseband IC for performing digital communication with an RFIC includes a digital interface circuit configured to receive a frame signal including at least one sampled signal from the RFIC according to a digital interface protocol, reconstruct the at least one sampled signal from the frame signal, and transfer the reconstructed sampled signal to a baseband modem in synchronization with a reception reference signal, and a sample synchronization manager configured to generate the reception reference signal, wherein the frame signal is transmitted from the RFIC to the baseband IC in synchronization with a transmission reference signal.

Baseband integrated circuit for performing digital communication with radio frequency integrated circuit and device including the same

Positive-type photosensitive polyimide precursor and composition comprising the same

This invention relates to optical devices such as a fiber-optic frequency shifter and an optical interferometer. This invention also relates to a method of generating optical interference signals to obtain reliable sensor signals independent of polarization fluctuations of the optical waves in the fiber. Fiber-optic interferometers have many advantages such as high sensitivity and convenient way of using even in poor surrounding environments. These interferometer, however, exhibit polarization dependent signal degradation since the polarization of a light wave passing through an optical fiber irregularly changes depending on the birefringence of the fiber. This invention is characterized in that the frequencies of two orthogonal eigen polarizations of a light wave are shifted to different frequency values at one optical path of the interferometer. They produce two beat interference signals after interfering with the light wave passed through the other optical paht of the interferometer. The two beat interference signals have amplitudes varying complementarily. Selecting the larger one from the two beat signals can prevent polarization dependent signal degradation. Moreover, the beat signals from the optical interferometer according to the invention requires simpler signal processing compared to the output of conventional fiber-optic interferometer.

Fiber-optic frequency shifter, optical interferometer and method of generating two complementary optical interference signals using the same

A polarization-dependent type directional isolator. The polarization-dependent type directional isolator comprises a pair of first optical means positioned at a path along which light travels for changing the rotation direction of an incident light depending on the traveling direction of the incident light; a pair of second optical means for rotating the incident light by a given angle; and a third optical means positioned between the pair of second optical means for passing through only specific components of the components of the incident light, thereby making it possible to obtain laser outputs oscillating in both directions independently.

Polarization-dependent type directional isolator and ring-type resonator laser

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Seoul, South Korea

Bong Kyu Kim