| 摘要 |
<p> a wavelength conversion device (1F) with which it is possible to avoid situations in which optical elements and the like are exposed to outside air, causing deterioration, and with which the conversion operation of nonlinear optical elements can be carried out rapidly, wherein a casing (700) is divided into regions by a partition wall (730), with one being provided with an incident window (720) and the other provided with an exit window (750). The wavelength conversion device comprises: a housing (80) that houses a nonlinear optical element (70); a stage (71) that is detachably fixed to the housing and that moves, together with the housing, a nonlinear optical element, in a direction that intersects with the optical axis of laser light that has entered from the incident window (720); optical systems (M5, M6) that guide laser light that has passed through openings (740) formed in the partition wall after being emitted from the housing (80) to the exit window (750); and a flexible tube (800) that connects the housing and the opening (740) formed in the partition wall. Purge gas supplied from the purge gas supply unit (910) to the housing (80) is supplied via a flexible tube to the other regions of the casing.</p> |
