The main types of medical lasers differ by the active medium and, above all, by wavelength, because wavelength decides which tissue absorbs the energy. This overview maps the lasers hospital planners meet in ophthalmology, ENT, general surgery and urology, explains what makes a laser medical grade, and gives a short framework for deciding which platforms a department really needs.
Why wavelength decides the use of a laser
Every tissue component absorbs light differently. Water, haemoglobin and melanin each have absorption peaks at particular wavelengths, so a laser that is strongly absorbed by water cuts and vaporises soft tissue, one absorbed by haemoglobin coagulates vessels, and one passing through clear media reaches the retina or trabecular meshwork. Power, pulse length and spot size then control how much heat or mechanical effect results.
That is why a single universal laser does not exist. Hospitals normally operate several types, each matched to a specialty and delivery method such as articulated arm, optical fibre or slit-lamp coupling.
Main surgical and ophthalmic laser types by wavelength
CO2 lasers at 10.6 µm are absorbed by water and give fine, almost bloodless cutting; the C-Las is a 30 W example. Nd:YAG at 1064 nm used in a Q-switched, nanosecond mode disrupts tissue mechanically for capsulotomy and iridotomy, as in the Q-Las; frequency-doubling to 532 nm suits selective trabeculoplasty. Diode lasers at 445, 810 and other wavelengths offer fibre delivery; 445 nm is used for ENT cutting with coagulation, and 810 nm for cyclophotocoagulation, retinal work and dacryocystorhinostomy.
Other wavelengths you will see on a market scan include Er:YAG at around 2.9 µm for hard and soft tissue, holmium at about 2.1 µm for urology, and green 514 or 532 nm lasers for retinal photocoagulation. Check each manufacturer's data for the exact specification; the examples here are for orientation.
Medical lasers by specialty
Ophthalmology typically uses YAG, SLT, argon-type green photocoagulators and diode lasers on a slit lamp or indirect ophthalmoscope. See types of ophthalmic lasers for a closer look. ENT departments use CO2 for precise microsurgery and 445 nm blue diode for fibre-based cutting and coagulation.
General surgery, gynaecology and dermatology use CO2 and diode platforms, and urology relies on holmium and similar lasers with fibre delivery. Always match the platform to the procedure list and the surgeon's training.
What makes a laser medical grade
A medical laser is a regulated medical device, not just a light source. It must comply with the electrical safety standard IEC 60601-1, the laser-specific collateral standard IEC 60601-2-22 for surgical, cosmetic, therapeutic and diagnostic laser equipment and the laser product safety standard IEC 60825-1, which defines hazard classes. See laser classes explained.
Beyond standards, medical grade means a stable and verifiable output, an aiming beam, interlocks, emergency stop, documented service procedures and registration with the relevant authority in your country; in the UAE, confirm current requirements with MOHAP and the emirate-level regulators.
Choosing platforms for a hospital
Begin with the list of procedures and annual volumes, then identify the wavelength and delivery method for each. Consider combined platforms where two lasers share a base, floor space and room requirements, and check eyewear, plume extraction and staff training.
A.R.C. Laser is a distributor-supported brand in our catalogue; see the A.R.C. Laser range. To compare options for your hospital, request a consultation from Beckfinity.
Frequently asked questions
How many types of medical lasers are there?
There are many, grouped by active medium, such as CO2, Nd:YAG, diode, Er:YAG and holmium. In practice each is defined by wavelength and delivery method.
Which medical laser is used for cutting?
CO2 lasers at 10.6 µm are a classic choice for precise cutting, while 445 nm diode lasers cut and coagulate through fibres.
What does medical grade laser mean?
It means the device is designed, tested and registered as a medical device in line with standards such as IEC 60601-1, IEC 60601-2-22 and IEC 60825-1.
Is one laser enough for a hospital?
Rarely. Different specialties need different wavelengths, although combined platforms can reduce the number of separate units.
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