LASER DEVICE

摘要

A light beam from an infrared (operating) laser (1) and a similar light beam from a visible (guide) laser (2) can be directed to an operating location either coincidentally through a mirror waveguide (4) or separately through respective fibres (25 and 26) of a fibre waveguide (3). An identifying section (45) determines which of the two wave-guides (3, 4) is being used at any particular time, and a processing section (53) automatically adjusts the output power of the infrared laser (1) in accordance with the known transmission factors of the waveguides (3 and 4) so that the power of the infrared laser beam at the operating location remains constant regardless of which waveguide (3, 4) is selected.