User Tools

Site Tools


d2:spectroscopy_module

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
d2:spectroscopy_module [2014/07/30 18:37]
127.0.0.1 external edit
d2:spectroscopy_module [2014/08/29 11:48] (current)
Line 3: Line 3:
 </WRAP> </WRAP>
  
-======Spectroscopy Module ======+======Spectroscopy Module (Obsolete) ======
  
 Model No. D2-110 Model No. D2-110
Line 14: Line 14:
  
 =====Description===== =====Description=====
 +
 +//**Replaced by [[d2:spectroscopy_module_210|D2-210 Spectroscopy Module]]**//
  
 The spectroscopy module provides saturated absorption spectroscopy to atomic rubidium. It contains a rubidium absorption cell, TEC, balanced photodetector, and associated mirrors and beamsplitting optics.  Nominally, it takes two 1% samples from the input beam.  Temperature control stabilizes the number density of atoms in the cell, and a balanced photodetection circuit compensates for intensity drifts giving stable control over the lock point for side locking applications.  Two beamsteering adjustments are provided for optimizing overlap of the counter-propagating beams, and positioning on the signal photodiode.  The photodiode output is shot-noise limited out to ~12 MHz for photocurrents of 50 A and above.  The high bandwidth of the feedback enables tight solid locking that is immune to vibrations and shock. The spectroscopy module provides saturated absorption spectroscopy to atomic rubidium. It contains a rubidium absorption cell, TEC, balanced photodetector, and associated mirrors and beamsplitting optics.  Nominally, it takes two 1% samples from the input beam.  Temperature control stabilizes the number density of atoms in the cell, and a balanced photodetection circuit compensates for intensity drifts giving stable control over the lock point for side locking applications.  Two beamsteering adjustments are provided for optimizing overlap of the counter-propagating beams, and positioning on the signal photodiode.  The photodiode output is shot-noise limited out to ~12 MHz for photocurrents of 50 A and above.  The high bandwidth of the feedback enables tight solid locking that is immune to vibrations and shock.
d2/spectroscopy_module.txt · Last modified: 2014/08/29 11:48 (external edit)