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d2:spectroscopy_module_210 [2019/05/31 13:44] – [Purchase Includes] Michael Radunskyd2:spectroscopy_module_210 [2024/03/27 15:58] (current) – [Spectroscopy Module] Thomas Bersano
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 Document Last Updated on ~~LASTMOD~~ Document Last Updated on ~~LASTMOD~~
  
-Please read [[:limited_warranty|Limited Warranty]] and [[:warnings_cautions|General Warnings and Cautions]] prior to operating the D2-210.  D2-210 [[http://www.vescent.com/products/electro-optics/d2-210-spectroscopy-module/|website]] and [[http://www.vescent.com/wp-content/uploads/2014/07/D2-210_2.3.pdf|data sheet]].+Please read [[:limited_warranty|Limited Warranty]] and [[:warnings_cautions|General Warnings and Cautions]] prior to operating the D2-210.  D2-210 [[http://www.vescent.com/products/electro-optics/d2-210-spectroscopy-module/|website]] and [[https://vescent.com/us/amfile/file/download/file/58/product/161/|data sheet]].
  
 =====Description===== =====Description=====
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 The remaining portion is passed through a fixed λ/2 waveplate and PBS to split off the pump beam from the probe beam.  The pump beam is directed to the Output Optics assembly where it is combined with the probe beam on a PBS in a counter-propagating configuration. The pump beam is dumped through the reflection port of the PBS that separated the pump and probe and terminates on the wall of the housing.  The probe is detected on the signal photodiode. The remaining portion is passed through a fixed λ/2 waveplate and PBS to split off the pump beam from the probe beam.  The pump beam is directed to the Output Optics assembly where it is combined with the probe beam on a PBS in a counter-propagating configuration. The pump beam is dumped through the reflection port of the PBS that separated the pump and probe and terminates on the wall of the housing.  The probe is detected on the signal photodiode.
  
-The beam diameters were designed to provide enough photocurrent (~50-100μA) to give shot-noise-limited performance out to 5 MHz while limiting saturation broadening.  For Vescent's DBR lasers, the bandwidth is useful to provide for tight and stable locking by feedback to injection current.  +The beam diameters were designed to provide enough photocurrent (~50-100 μA) to give shot-noise-limited performance out to 5 MHz while limiting saturation broadening.  For Vescent's DBR lasers, the bandwidth is useful to provide for tight and stable locking by feedback to injection current.  
  
  
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 <imgcaption image1|Pin numbering on female Hirose 6-pin connector>{{  :d2:d2-160:hirose-connector.png?200  }}</imgcaption> <imgcaption image1|Pin numbering on female Hirose 6-pin connector>{{  :d2:d2-160:hirose-connector.png?200  }}</imgcaption>
  
-<WRAP center round box 900px><tabcaption connector> +<WRAP center round box 900px><tabcaption connector|Power cable pin out
-^  Hirose Pin  ^  DB-9 Pin (if applicable)  ^  Input Voltage  ^  Max Current Draw  ^  Notes  ^+^  Hirose Pin\\ (VPN00410 and VPN00475)   DB-9 Pin (VPN00410)  ^  Input Voltage  ^  Max Current Draw  ^  Notes  ^
 |  1  |  4 and 5    Signal Power Ground  | | Return path for power rail. | |  1  |  4 and 5    Signal Power Ground  | | Return path for power rail. |
 |  2  |  8  |  -7 V to -15 V  |  100mA  | See note below. | |  2  |  8  |  -7 V to -15 V  |  100mA  | See note below. |
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 |  6  |  1 and 2  |  +5 V Ground  | | Return path for high current +5V. | |  6  |  1 and 2  |  +5 V Ground  | | Return path for high current +5V. |
 </tabcaption></WRAP> </tabcaption></WRAP>
-<wrap lo>Note:  When powering the D2-210 with supplies other than a D2-005, pins 5 and 6 can be placed between 7-15 V. They need not be symmetric, but both supply rails are always required.</wrap> 
-<wrap lo> See D2-005 manual for pin out on D-Sub 9-pin connector.</wrap> 
- 
  
  
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 **Temperature Bias Adj.** **Temperature Bias Adj.**
  
-For the Doppler subtraction option this control enables the user to input a small temperature difference between the reference and signal vapor cells.  In the fully CCW position the signal vapor cell heater gets all the current.  In the full CW position the reference cell heater gets twice the current as the signal cell.  This adjustment can be used to place the optimum point for Doppler Subtraction closer to zero Volts.+[Note: this adjustment is only available on older D2-210 models.] For the Doppler subtraction option this control enables the user to input a small temperature difference between the reference and signal vapor cells.  In the fully CCW position the signal vapor cell heater gets all the current.  In the full CW position the reference cell heater gets twice the current as the signal cell.  This adjustment can be used to place the optimum point for Doppler Subtraction closer to zero Volts.
  
 This adjustment only has an effect with the -DS, Doppler Subtraction option. This adjustment only has an effect with the -DS, Doppler Subtraction option.
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-The following images are representative of spectroscopy for <sup>87</sup>Rb with and without Doppler subtraction.  Note that Doppler subtraction has a minimal effect on peak lock signal generated by dithering the laser (green traces).+The following images are representative of spectroscopy for <sup>87</sup>Rb with (<imgref ds>and without Doppler subtraction (<imgref no-ds>).  Note that Doppler subtraction has a minimal effect on peak lock signal generated by dithering the laser (green traces).
  
 +<imgcaption image1|Pin numbering on female Hirose 6-pin connector>{{  :d2:d2-160:hirose-connector.png?200  }}</imgcaption>
  
-{{ :d2:d2-210:sas.jpg?nolink |}} +<imgcaption no-ds|Non-Doppler subtracted side- and peak-lock spectra>{{ :d2:d2-210:sas.jpg?nolink |}}</imgcaption> 
-{{ :d2:d2-210:sas_w_ds.jpg?nolink |}}+<imgcaption ds|Doppler subtracted side- and peak-lock spectra>{{ :d2:d2-210:sas_w_ds.jpg?nolink |}}</imgcaption>
d2/spectroscopy_module_210.1559310253.txt.gz · Last modified: 2021/08/26 14:26 (external edit)