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| Home / Laser Medicine / What is Laser/ Hard laser & Soft laser |
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What is Laser - Hard laser & Soft laser
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Hard laser & Soft laser - What is difference?
Hard Laser (Surgical Laser) : which removes , kills , burns , cut something
Compact Laser (Soft Laser) : has Therapeutic effect of pain management / infection control / re-generation
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Compact Laser (Soft Laser) :
- Class 3 B Lasers by International Standards
- Class 2 M Lasers introduced in India now
- Low Power (1-500 mW)
- 600-1000 nm wavelength (Red & Infrared light)
- No thermal effect at all
- Photochemical reaction (Photon energy converted to Biochemical energy) new chemical products formed leading to healthy effects in tissues
- Principle of function : Photobiostimulation
- Potential danger to eyes
- Safe on skin
- Comparatively affordable cost
- No special set up required
- Comparatively less human skill is required
- Portable and mobile equipments
- Examples : He-Ne Laser, GaAs & GaAlAs Diode Lasers
- Fibreoptic delivery is possible
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Hard Laser (Surgical Laser) :
- Class 4 Lasers by International Standards
- High Power (> 500 mW), usually 1W & above
- Wavelengths vary from U.V. to Infrared
- Thermal changes
- Photothermal reaction (Photon energy converted to Thermal energy or heat) effects of tissue cutting, burning, photocoagulation
- Principle of function : Photothermal
- Potential danger to eyes
- Potential danger to skin
- Expensive
- Special set up required
- Comparatively high human skill is required
- Usually non-portable
- Examples : CO2, Er-YAG, Nd-YAG, Eximer, Diode Lasers
- Fibreoptic delivery is not possible
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