What is the term for the depth at which lasers can transmit energy through the skin?

The term that specifically refers to the depth at which lasers can transmit energy through the skin is commonly known as "pulse depth." This concept is crucial in laser treatments because it determines how effectively the laser energy can penetrate the skin layers to reach the targeted tissue. Each type of laser has a particular pulse depth that is influenced by its wavelength and other characteristics, playing a significant role in various applications such as tattoo removal, hair removal, or skin rejuvenation.

Understanding pulse depth helps practitioners select the appropriate laser for a specific treatment and allows for optimal energy delivery to achieve desired therapeutic effects while minimizing damage to surrounding tissues. Other terms, such as wave frequency and photon intensity, relate to the laser's characteristics and energy output but do not directly address the penetration depth relevant to clinical applications. Similarly, energy absorption refers to how much energy is absorbed by the tissue but does not specify the depth at which this occurs, making pulse depth the most accurate term in the context of this question.