Diode Laser Applications with wavelengths-650nm/810nm/980nm/1064nm/1470nm/1940nm
Lasers have been used for various medical procedures such as dermatology and cosmetic surgery , wound healings, nerve stimulation, dentistry ophthalmology applications for vision corrections and corneal deceases. and many other therapeutic procedures. Combining the nanoparticles, diode lasers have been also used for cancer therapy, bio-sensing, bio-imaging, drug delivery and diagnostics of cancer cell. Lasers in the near infrared (IR), wavelength of (750-1200) nm, have deeper tissue penetration depths than that of visible lasers. Therefore, near IR lasers are good candidates for procedures which need deep penetrations such as hair removal and nano-gold mediated cancer therapy. On the other hand, visible lasers (430 – 680) nm with strong absorption in blood and color-dyes have been used for phototherapy of oral cancer, retina deceases and tattoo removal. Mid-IR lasers (1.9-3.0) um and (9.3 -10.6) um with strong absorption in water and tissue have been used for super surface procedures or ablative type procedures such as soft and hard tissue ablation. Other IR lasers (1.3-1.6) um have been used for so called minimally invasive procedures such as resurfacing due to their smaller tissue absorption than that of mid-IR lasers.
Diode lasers can be used for various surgical procedures including soft tissue cutting, coagulation and cancer thermal therapy.
Laser-matter interaction Laser-tissue (or other media) interaction, in general, could be categorized into three processes: (a) pure thermal, (b) non-thermal, and (c) combined thermal and non-thermal effects. As shown in Figure 1, laser can be reflected, absorbed, scattered or transparent to the matter. These processes are governed by not only the tissues (media) optical properties but also the laser parameters such as its wavelength, energy, intensity, pulse-width, repetition rate and the operation modes, continuous wave (CW) or pulsed mode. Various fiber structures for effective delivery of the laser energy to the treated areas are also critical in specific applications.
Combining the nanoparticles, diode lasers have been also used for cancer therapy, bio-sensing, bio-imaging, drug delivery and diagnostics of cancer cell. Various nanoparticles (gold, polymers, silica etc) have been explored for the use of surface plasmon resonance (SPR) including shapes in spheres, rods, boxes, cages and shells. For example, by changing the shape of nanogold from sphere to nanorod, the absorption and scattering peaks change from visible (about 530 nm) to the near-infrared (NIR) regime (about 750 to 980 nm). Comparing to the visible light, light in the NIR regime offers the advantages of larger absorption and scattering cross sections and much deeper penetration depth in tissues. The in vivo studies in animal and/or human cancer therapy shall include the non-uniform gold nanorod (NGR) concentration in the tumor, the multi-layer normal-cancer tissue medium with multiple thermal parameters, and the blood flowing of the laser-targeted areas. The design of multiplewavelengths laser system shall partially overcome the issues of GNRs non-uniform and multiple thermal medium for a 3-dimensionaltherapy, in which various absorption penetration depths are available via the fiber-coupled multiple-wavelength laser simultaneously targeting the cancer tumors.
Cosmetic and dermatology
Commercial laser for hair removal (using a diode laser at 810 nm with large penetration depth about 4 mm) and hair growth device (using a red, 635 -690 nm, LED or laser with smaller penetration depth and low power for surface stimulation)
Diode laser (at 808 or 980 nm) for soft tissue cutting and stimulation.
Diode lasers (at 806-810 nm). Photocoagulation process was also used to seal leak blood vessels for the treatment of age-related macular degeneration (AMD).
1470nm1940nm diode laser has high absorption in water and with much less bleeding and fast recovery time.
Wuhan Dimed laser is Specializing in medical laser development, manufacturing, marketing and selling.
We offer the whole series of wavelengths and power of diode lasers