BTL 2000 Series - 4.3.3 Operation mode

BTL-2000
USER'S MANUAL & USER’S GUIDE
Page 33 z 45
MODULATED PULSE
Mean
Power
Time
Power
Time
Mean
CONTINUOUS
Mean
Power
Laser beam penetration through tissue is to a great extent dependent on the wavelength. In general, green and blue
lasers are still being developed and their clinical use is extremely limited. Most commonly used are beams in the
wavelength of red light. After 2-3mm penetration through living tissue, their intensity is reduced to half. This
predetermines red laser beams to be used especially in mucose and skin disease therapy. Since the output is
absorbed by a very small column of tissue, devices of 20mW and smaller output are usually fully adequate.
Infra-red lasers intensity is reduced to half after 2-3cm penetration through tissue. These lasers are used especially
in treating deep structures (joints, muscles, attachments). Since the output is absorbed by the column of tissue and
we want the intensity absorbed by a target area deep in the tissue to be sufficient, we recommend devices of at least
30 mW output.
4.3.3 Operation mode
• pulse lasers: short intervals of radiation emission -- hundreds of ns and top function of the laser is in
instruments or tens of watts.
• continuous lasers: uninterrupted emission of radiation.
• lasers with modulated operation: duration of the pulse depends on frequency and employed substance. Top
function of the laser is in instruments through hundreds of mW.
Time
Producers usually offer various alternatives, including the possibility to combine various modes modulated in
accordance with various parameters.
Infra-red radiation,
microwaves, radio
Ultraviolet radiation,
X-rays, gamma rays,
cosmic radiation
400nm 600nm
500nm 700nm
Visible spectrum