Vescent Photonics
D2 Series Product Manual
5. At this point the beam should be going through the center of the input and output apertures on the
module, the center of the 6 mm lens, and the second pick off should be impinging on the
reference photodiode (see Figure 1). Make adjustments as necessary.
6. Retighten the locking screws on the DBR module.
7. Use the card to ascertain the position of the returned beam on the first corner mirror.
8. Use the course positioning controls to place the retro-reflected beam as close as possible to the
incoming beam.
9. Use the card to probe the opposite corner mirror (along short side) to see if the retro beam is now
passing back through the input beamsplitter.
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