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We were able to see a bright red beam that did all of the following
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-seemed to correspond with the resonance peaks of the cavity▼
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▲--seemed to correspond with the resonance peaks of the cavity
--seemed to correspond with the turning on and off of the modulation RF
It was a bit confusing, though, because in addition to the (probable) 633 that has the above characteristics, you can still see red light coming from the prism. This other red light is constant in intensity, in contrast to the 633. I'm not sure exactly what is from, but it must be from the 785 beam. Maybe it is diffuse scattered light from the reflections of the (small amount of) 785 that reaches the prism. At its best, the 633 was seen to be at least as bright as this other constant beam, if not brighter. The 633 seemed to be coming from the same location on the prism as this other beam, though it was visible when the prism was viewed at a slightly different angle.
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