Set grating in front of 1064 nm beam (current set to 1.058 A for a beam visible on the IR card). After testing both orientations, it becomes clear the grating is misoriented. The difference is very clear, there is only specular reflection in the current configuration, whereas the m=0, and +- 1 orders are visible in the 180 deg flipped configuration.
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Very exciting to see the gain chip curve!
Grating orientation: Whaaat... If you already have the 1um laser SOP approved, you can use that laser to check the grating orientation.
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