| 摘要 |
<p>A multi-wavelength surgical laser apparatus (1) of improved construction employs a fluid-filled stimulated Raman scattering cell (1b, 20) in an optical feedback path of a pump laser (1a, 10) having a power in a range suitable for surgery, and drives the Raman cell at a high repetition rate in a manner to produce a laser output at a substantially shifted wavelength at a power commensurate with that of the pump laser. In a preferred system, the relative proportions of pump light and Raman scattered light are varied to achieve a desired cutting or coagulating action. Preferably, the pump laser is operated at a pulse repetition rate above five hundred Hz. The fluid Raman medium is pumped across the optical axis of the cell. The flow system effectively doubles the Raman conversion efficiency and permits high power output while lowering the Raman lasing threshold.</p> |
