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Cryo Lab eLog |
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Tue Aug 25 13:42:40 2020, aaron, Update, Lab Work, optics setup
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Wed Aug 26 12:12:22 2020, aaron, Update, Lab Work, optics setup
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Fri Aug 28 16:59:59 2020, aaron, Update, Lab Work, optics setup
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Mon Aug 31 10:00:25 2020, aaron, Update, Lab Work, optics setup
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Message ID: 2564
Entry time: Fri Aug 28 16:59:59 2020
In reply to: 2562
Reply to this: 2565
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Author: |
aaron |
Type: |
Update |
Category: |
Lab Work |
Subject: |
optics setup |
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I measured the transmission of the Coastline 1m mirror at 180. ppm (S122C).
Alignment procedure while setting location of optics:
- use 2x irises to constrain a beam path at the locations of the eventual MZ input BS and the cavity BS.
- Place the first (R~1) flat mirror at 45 degrees centered on the beam line. Use this mirror to steer into an iris at the location of the cavity's curved mirror.
- Use steering optics to direct the eventual transmission beam into the trans mon PD (PDA 20CS)
- Place the curved mirror at near normal incidence. Use this mirror to steer the beam through irises at the location of the MZ output BS and cavity BS.
- Use steering mirrors to send the beam to the refl PD (PDA255).
- Place the cavity BS and steer the reflected beam to the refl PD.
Alignment procedure subsequently:
- Misalign the cavity BS
- Use the cavity mirrors to steer the circulated reflection into refl PD.
- Use cavity BS to align prompt reflection into refl PD.
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