The present invention describes a multi-component handpiece that is both economical and practical for surgical 
laser treatment. A disposable 
optical fiber is inserted into a reusable handpiece. The distal end of the 
optical fiber is protected by a micro-walled protective tube to prevent the disposable 
fiber from chipping before and during 
insertion into the handpiece. Once the 
optical fiber is protected, it is inserted into the handpiece by threading the optical 
fiber through the cap, body, and cannula of the handpiece until the 
fiber extends slightly beyond the distal end of the needle. The micro-walled protective tube is removed from the end of the optical fiber, the optical fiber is positioned, and the cap is tightened. The cap and body of the handpiece cooperate to produce a tight friction fit that prevents longitudinal movement of the optical fiber during 
laser therapy. The tight friction fit holds the optical fiber in place without the use of adhesives, which allows for facilitated removal of the disposable fiber after use. Furthermore, a disposable fiber allows for convenient resterilization of the handpiece to eliminate the transmission of 
disease from one patient to the next without having to dispose