Dr. Károly Rózsa (1939-2017)

“Wherever I was, I always felt good about having a country. I think that if I didn't study
Hungarian, I didn't think Hungarian, I would have taken it less. I think the whole way of
thinking, logic, the structure of the Hungarian language is something wonderful that we
can't really appreciate .”
He is one of the pioneers and dominant figures of laser research in Hungary, whose
scientific work is qualified by more than 200 publications. Undoubtedly, it played a decisive
role in the fact that since the construction of the first laser in Hungary in 1964, Hungarian
laser research has been at the forefront of the world for the past fifty years. In addition to
basic research, he has always considered it important that the results of his scientific work
also improve people's everyday lives. This idea was also led when he invented in the early
2010s how to tame laser light, to eliminate its dangerous properties to the eye: this is how
Safe Laser Technology was born, which revolutionized soft laser treatments.
He studied to be a chemical engineer, but spent more than fifty years doing physical
research. In addition to the family, the Central Physical Research Institute (KFKI) was its
second home, where, in addition to experiments in optics, it focused most on laser
The II. in the year of the outbreak of World War II. He lost his parents as a child, and was
raised in the countryside by his maternal grandparents who moved from Transylvania. In
the 1950s, overcoming the disadvantages of his origin, he was admitted to the Petrik Lajos
Chemical Technical School due to his excellent academic results. “I’ve become a great
teacher, I’m grateful for the fate of being able to learn physics and chemistry from the
nationally renowned Tibor Papp, for example,” he recalled in an interview.
After graduating, he worked as a chemical technician in a paint factory. Tibor Mátrai brought
the big turning point in his life: when he got to KFKI, he talked him into going to university. In
addition to his work, he graduated from the Faculty of Chemical Engineering of the
Technical University in the evening, but he never became unfaithful to KFKI. As a researcher
and visiting professor, he has worked with some of the best physicists of the age in the
United States, Japan, Australia, Canada, Austria, and the Soviet Union. He always had a good
time everywhere, but he loved coming home.
“Wherever I was, I always felt good about having a country. I think that if I didn't study
Hungarian, I didn't think Hungarian, I would have taken it less. I think that the whole way of
thinking, logic, the structure of the Hungarian language is something wonderful that we
can't really appreciate, ”he often explained to his students, to whom he no longer boasted
that he had learned perfect English in a year, practically from a dictionary.
In addition to laser research and family, sports have filled his life. He played volleyball at a
young age, later sailing, skiing and hiking became the dominant ones, teaching more than a
hundred people to sail. He didn’t consider himself talented in the sport, but he was able to

concentrate legendarily on what he used most in table tennis: he was already 70 years old
when he was still playing for the KFKI team.

Scientific research, field:

1963- Acquisition of knowledge of optical spectroscopy, vacuum technology and gas
discharge for the study of the spectra of diatomic molecules in the Department of
Aspectroscopy. These research experiences led him to launch research on gas lasers, which
he has been dealing with ever since.
He developed the world's first cathode-sputtered resion laser
He was the first to create a laser phenomenon in voltage-controlled hollow cathode
University diploma thesis
- He-Ne gas laser technology and spectroscopy

University doctoral dissertation

Laser spectroscopy,
Candidate's dissertation

Gas discharges designed for laser purposes
Academic Doctoral Dissertation

Research on distant ultraviolet lasers generated in gas discharges developed for laser
Visiting researcher, visiting professor

Soviet Union: Lebedev Physical Research Institute, Moscow
Austria: University of Innsbruck
Japan: Institute of Ion Physics Ibaraki UnivesityNagoya University

Australia: Monash University
Canada: McMaster University
USA: University of Arizona, University of New Mexico - Los Alamos Natl. Lab, Colorado State
University, JILA, (U. of Colorado and NIST)

3 patents on gas laser construction
a patent for a polar light lamp (construction and application) (co-owner of the BIOPTRON
lamp patent)
He performed the first successful polarized-lantern healing treatment under the supervision
of Dr. Katalin Csizmadia.

Safe Laser Company

Founders of the Safe Laser Group
Tamás Rózsa (electrical engineer and laser researcher),
Mónika Peics (teacher-laser instructor)
Dr. Károly Rózsa (laser physicist, † 2017).

The task of Safe Laser Lp. Is the development, production and research of general and
medical lasers.
Safe Laser Trade Ltd. Performs educational, commercial and marketing activities.
“Safe Laser” devices are classified as Medical Risk Class II.a medical productsaccording to
the Council Directive 93/42/EEC concerning such medical items.
We attach great importance to research and development, and we have several patents
related to optics, lasers and light therapy. 
Dr. Karoly Rozsa † (doctor of Hungarian Academy of Sciences) worked with lasers in
research, development since 1963. He owns many pattens about gas-laser constructions.
As a visiting professor he lead laser researches in four different universities in the US,
Canada, Australia, Japan, Austria and the former Soviet Union. He accomplished the first
successful healing with polarized-lamp (under the supervision of Dr. Katalin Csizmadia),
which led to the patent of polarized light treatment.

In 2012 he opened a new chapter in the history of lasers with the Safe Laser technology. The
Safe Laser optical arrangement allowed that high power (30mW-2000mW) lasers can be safely used without danger to eyes. This new technology significantly expanded range of
lasers users.

With the "Safe Laser" technology we can provide safer, stronger, more efficient lasers for
the doctors and the general public. Developing our lasers we work together closely with a
variety of medical specialties and outstanding professionals to make both technically and
medically the most effective and reliable equipment.
Our company has a quality management system as defined in EN ISO 13485: 2012 standard
and in the 4/2009 Regulation (III.17), the Ministry of Health.

• The results of our research and development should help people and animals to heal and
rehabilitate faster and more efficiently
• Make the laser a part of every family's home pharmacy
• Regular and conscious use of the laser will help to improve people's quality of life
• Introduce people to the wide-ranging healing effects of lasers
• As a result of the revolutionary Safe Laser Technology, safe laser healing at home should
be available to everyone
• Soft laser should be more widely used in human medicine and veterinary medicine.