Figure 8-7. A6 Sampler Assembly, Exploded View - HP 5501B Operating And Service Manual

8-36. The power in each laser frequency component is measured by sampling some of the laser light
with a pair of non-polarizing beam splitters (see Figure 8-7) and passing one of the laser
frequency components, then the other, through an optical switch and onto a photodiode. The
beam splitters are part of the A6 Sampler Assembly and the photodiode is mounted on the A4
Sampler Board. A liquid crystal and a polarizer comprise the optical switch.
8-10

Figure 8-7. A6 Sampler Assembly, Exploded View

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