WAVELENGTH TUNABLE CAVITY WITH ROTATIONAL MOVEMENT

摘要

A wavelength tunable cavity comprises a first cavity end mirror (10) serving to at least . partially reflect an incident beam (80) of electromagnetic radiation towards a second cavity end mirror (30), said at least one second cavity end mirror (30) serving to at least partially reflect an incident beam (80) of electromagnetic radiation back towards said first cavity end mirror (10), both mirrors (10,30) providing the formation of resonance modes of said electromagnetic radiation within said cavity, wherein an optical path of said beam (80) within said cavity is defined in length by said first (10) and second cavity end mirror (30), a grating (20), which is arranged within said optical path of said beam (80) being reflected by said first cavity end mirror (10), said grating (20) being adapted for tuning the wavelength of said beam (80), wherein said at least one second cavity end mirror (30) is arranged being rotatable about an axis (40) by at least 360 degrees for providing a continuous movement (41) of said second cavity end mirror (30) along a circle path with respect to said grating (20), said circle path of said second cavity end mirror (30) comprising at least a portion (32) being arranged to intersect with said beam (80), which is redirected by said grating (20).