Wavelength-selection device having optical alignment stability with use of prisms in a dual-wavelength laser

摘要

PURPOSE: A wavelength selection device having optical alignment stability for a double wavelength laser by using prisms is provided to not need laser rearrangement or target re-aiming by preventing the change of an optical axis in a wavelength conversion process. CONSTITUTION: An Nd:YAG pump oscillator generates pump lasers of a source wavelength. A folding prism set(130) is located between the pump oscillator and a wavelength converter. The folding prism set selectively outputs the pump lasers and wavelength conversion lasers. A spinning table(180) rotates the folding prism set at a lower portion of the folding prism set. The wavelength converter receives the pump lasers of the source wavelength coming from the pump oscillator through the folding prism set and a connection prism(140). The wavelength converter provides the wavelength conversion lasers of a changed wavelength. Two folding prisms are arranged on an incident plane of the pump lasers.