What should you know about green laser diode voltage?

A diode laser converts electrical energy into light at a selected wavelength. Voltage supports the device’s operation, while clinical settings describe factors such as delivered energy, pulse timing, spot size, cooling, and coverage. These controls are linked to the device design and the treatment goal. A green indicator, cable, or housing does not by itself show the wavelength or suitability of a device. The relevant technology page for [Diode Laser](/technology/diode-laser/) should be considered alongside the provider’s device information.

Do not adjust voltage or operate a medical laser without trained supervision. Before treatment, ask which wavelength is used, what body area is being treated, how the skin will be protected, and whether the device is intended for your concern. For hair reduction, ask how the device and settings are selected for your hair colour, skin tone, tanning, and sensitivity. More information is available in [Laser Hair Removal](/treatments/laser-and-energy/laser-hair-removal/).

Tell the provider immediately if protective eyewear does not fit, the device behaves unexpectedly, or the treatment feels sharply burning rather than tolerable warmth. After treatment, contact the clinic for worsening pain, blistering, open skin, spreading redness, or major swelling. Eye pain or vision changes after facial treatment require urgent medical assessment.

Ask for the device name, wavelength, intended purpose, safety checks, cooling method, and aftercare instructions. Ask who will perform the treatment and how the settings will be adjusted after observing your skin’s response.