What type of laser would be the least effective for tissue cutting?

The excimer laser is considered the least effective for tissue cutting primarily due to its mechanism of action and the wavelengths it uses. Excimer lasers typically emit ultraviolet light, which is capable of very precise material removal at a microscopic level. This makes them highly effective for various applications, such as corneal surgery, where precise ablation of tissue without significant thermal damage is essential. However, the energy delivered by excimer lasers does not penetrate deeply into tissue, making them less suitable for general cutting compared to other types of lasers.

In contrast, both Nd:YAG and diode lasers are more effective for tissue cutting due to their ability to penetrate deeper into tissues. Nd:YAG lasers, with their longer wavelength, can cut through various types of tissues, including surgical procedures involving softer tissues. Fractional CO2 lasers are also highly effective for ablative purposes, allowing for deeper tissue interaction, which facilitates cutting and resurfacing. Each of these lasers can effectively generate enough thermal energy to incise or excise tissue, which is why they are preferred over excimer lasers for cutting applications.