What is the wavelength of a diode laser?

The wavelength of a diode laser is typically around 810 nanometers. This wavelength is commonly used in hair removal treatments and other dermatological applications. The 810nm wavelength falls within the infrared spectrum, making it effective for targeting the melanin in hair follicles while minimizing damage to the surrounding skin.

In the context of laser hair removal, this specific wavelength allows for a good penetration depth, which is crucial for reaching the hair growth cells. It is also well-absorbed by the melanin present in both darker and lighter hair colors, although the efficiency can vary depending on the contrast between the hair and the skin tone.

Other wavelengths listed, such as 755nm and 980nm, correspond to different types of lasers used for various treatments in aesthetics and medicine but do not specifically represent the standard wavelength for diode lasers, which is why they are not the correct answer in this case.