发明申请

TUNEABLE LASER
摘要:
A tuneable quantum cascade or interband cascade laser (100) has a gain (medium110), a cavity mirror (20), an interference filter (130) and a positioning (mechanism140). The gain medium (110) has an emission spectrum and the gain medium (110) is configured to emit a laser (beam111). The interference filter (130) is located between the gain medium (110) and the cavity (mirror120). The interference filter (130) is configured to transmit a portion of the emission spectrum in order to suppress laser emission by the gain medium at wavelengths other than the transmitted portion. The portion of the emission spectrum transmitted by the interference filter (130) varies across the interference (filter130). The positioning mechanism (140) is configured to move the interference filter (30) relative to the laser beam (111) in order to select the portion of the emission spectrum transmitted by the interference (filter130), thereby determining the emission spectrum of the tuneable (laser100).
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