Opticist rises to fame with laser beams

Kim Chol Hyon, a teacher of Kim Chaek University of Technology in the DPRK
Kim Chol Hyon, teacher and editor. (Photo Credit KCNA)

By Chae Hyang Ok

"I would like to cordially invite you to become a part of the editorial board for Non-Metallic Material Science, a new international academic journal," said a representative of Bilingual Publishing CO in Singapore in an e-mail sent to Kim Chol Hyon, researcher at the laser lab of the Faculty of Physical Engineering of Kim Chaek University of Technology.

Born in Pyongyang, he graduated from Moranbong Middle School No. 1 and then from the Faculty of Physical Engineering of the university.

At university, he had a special attachment to laser engineering.

He thought that the development of an intensive laser light with favourable properties is of great significance in pioneering a new scientific and technological field and modernizing production processes in several sectors of the national economy.

During his post-graduation course, he presented a new theory on the laser light control technology and won a doctorate for the research hit.

After finishing the course, he became a researcher at the laser lab.

"One of his excellent quality is that once he sets a high aim, he buckles down to the research work with perseverance and diligence," said Ri Chol Man, chief of the lab.

After ten years of efforts, he completed the study paper "Effect of linewidth enhancement factor on fringe in a self-mixing signal and improved estimation of feedback factor in laser diode" and published it in the March 2019 issue of the IEEE Access.

The paper suggested a novel method of estimating in real time the feedback factor which specifies the pattern of the fringe in a self-mixing signal when the optical beam is back-reflected or back-scattered into the laser cavity by a target.

After that, he was invited to the editorial boards of the international academic journals Non-Metallic Material Science and Journal of Computer.

Having worked as an editor for Non-Metallic Material Science since May last year, he reviewed a study paper from SCI international academic journal Applied Optics. His review impressed the editorial staff so deeply that they asked him to continue to work as a reviewer.

This year he published his papers in the Netherlands' Optics Communication and the UK's Measurement Science and Technology.

Now, he is working on a project for introducing the laser precision tracking device.

(Pyongyang Times - May 25, 2020)

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