Laser intensity monitoring apparatus with metallic thin film...

Details Laser intensity monitoring apparatus with metallic thin film... Laser intensity monitoring apparatus with metallic thin film...

G - Physics

01

J

G01J 1/42 (2006.01) G01C 19/66 (2006.01) G01J 1/06 (2006.01)

Patent

CA 2122027

The present invention relates to a laser intensity monitor (10). Specifically the laser intensity monitor (10) uses a black chrome metallic, non-light transmissive mask (24) deposited on an optically transparent glass or sapphire window (16). The mask (24) has an aperture (100) therethrough. The mask (24) is positioned on the window (16) in such a manner that only the TEM00 mode of a counter-rotating laser beam is allowed to pass through the aperture (100) of the mask (24) and the window (16) to strike a photodetector (12).

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