| 摘要 |
A wavelength tunable laser resonator (1) comprises a first resonator end reflector (10) for reflecting a beam (5) of electromagnetic radiation towards a second resonator end reflector (20), said second resonator end reflector (20) for reflecting said beam back towards said first resonator end reflector (10), said first and second resonator end reflector defining a resonator having an optical path with a length, a gain medium (14) for generating and/or amplifying and emitting said beam (5) towards said first and second resonator end reflector, said gain medium (14) being arranged within said resonator, a diffractive optical element (40), which is arranged within said optical path, being adapted to filter a wavelength of said beam (5) of electromagnetic radiation and being designed to focus a portion of said beam (5) comprising said filtered wavelength towards said gain medium (14), wherein at least one of said first or said second resonator end reflector (10, 20) is arranged to be movable with respect to other optical elements within said resonator (1) for increasing or decreasing said length of said optical path of said resonator (1), and wherein said diffractive optical element (40) is arranged to be movable with respect to said other optical elements within said resonator (1) for adapting said filtered wavelength to said increase or decrease of said length of said optical path. <IMAGE> |
