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d2:spectroscopy_module [2014/07/30 18:37]
127.0.0.1 external edit
d2:spectroscopy_module [2014/08/29 11:48] (current)
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 </​WRAP>​ </​WRAP>​
  
-======Spectroscopy Module ======+======Spectroscopy Module ​(Obsolete) ​======
  
 Model No. D2-110 Model No. D2-110
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 =====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)