User:Pranav Rathi/Notebook/OT/2010/08/02/x & y Signal Drift Issue: Difference between revisions
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# Measure the beam waist again (2 x W =1.5) at QPD, to make sure that the ratio is 1:1. | # Measure the beam waist again (2 x W =1.5) at QPD, to make sure that the ratio is 1:1. | ||
# Straighten the beam after the telescope, using two aperture techniques [[http://openwetware.org/wiki/User:Pranav_Rathi/Notebook/OT/2010/04/20/Super_easy_way_to_straighten_and_align_two_laser_beams_simultaneously]]. | # Straighten the beam after the telescope, using two aperture techniques [[http://openwetware.org/wiki/User:Pranav_Rathi/Notebook/OT/2010/04/20/Super_easy_way_to_straighten_and_align_two_laser_beams_simultaneously]]. | ||
# Setup the QPD | # Setup the QPD on the xyz translation stage. | ||
[[Category:Optical Tweezer]] | [[Category:Optical Tweezer]] | ||
Revision as of 14:00, 2 August 2010
under work
Setup & procedure
Steps
- Measure the beam waist (2 x W=1.5) at the eyepiece lens of the telescope.
- Setup the (1:1) telescope: In this case two planoconvex lenses (f=38.1mm of both) are used.
- Measure the beam waist again (2 x W =1.5) at QPD, to make sure that the ratio is 1:1.
- Straighten the beam after the telescope, using two aperture techniques [[1]].
- Setup the QPD on the xyz translation stage.
