Korea Research Institute of Standards and Science

Taeg Yong Kwon

Sang Eon Park

Han Seb Moon

Sam Yong Woo

Hyun Gue Hong

Young Beom Kim

Myungsoo Kim

Seong Hoon Yang

Chang Young Park

Eok Bong Kim

Myoung Sun Heo

Sang Bum Lee

An embodiment of the inventive concept provides a physics module of a chip-scale atomic clock. The physics module includes: a housing; a laser source disposed in the housing and generating a laser beam; a vapor cell disposed above the laser source to generate a transmitted beam from the laser beam; and a detector disposed above the vapor cell to detect the transmitted beam. Here, the vapor cell may include a plurality of optical patterns configured to polarize the laser beam.

Physics module of chip-scale atomic clock

In the present invention, time information is sent through a common power line in executing home automation devices or using various industrial equipments. In the power line broadcasting, a small amount of data, such as time information, is transmitted unidirectionally, and long-distance power line broadcasting can be possible using carriers of a low frequency band. time setting for various instruments is automatically performed in response to a power signal after a breakdown of electric current, making unnecessary a user's action to perform the time setting, and the existing power line can be used without change.

Apparatus and method for transmitting and receiving time broadcasting information using power line

The present invention relates to an optical frequency synthesizer and an optical frequency synthesizing method using femtosecond laser optical injection locking, which inject a femtosecond laser optical frequency comb into a diode laser, thus obtaining single-mode laser light, phase-locked to only a single mode in the optical frequency comb, and which change the optical frequency and interval, that is, the repetition rate, of a femtosecond laser, together with the frequency of a semiconductor laser, thus scanning optical frequencies while realizing a single desired optical frequency. The optical frequency synthesizer using femtosecond laser optical injection locking, includes a mode-locked femtosecond laser (), which is a master laser, and a diode laser (), which is a slave laser and into which laser light emitted from the femtosecond laser is injected.

Frequency synthesizer and frequency synthesizing method using optical injection locking

Growing community of inventors

Daejeon, South Korea

Taeg Yong Kwon