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d2:spectroscopy_module_212 [2014/12/08 19:38] – Michael Radunsky | d2:spectroscopy_module_212 [2023/04/18 16:31] (current) – external edit 127.0.0.1 |
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The D2-212 saturated absorption spectroscopy module provides error signals derived from saturated absorption spectroscopy of atomic rubidium, cesium, or potassium. It contains a vapor cell, internal temperature controller, a single photodetector, and optics. Temperature control stabilizes the number density of atoms in the cell.The photodiode output is shot-noise limited out to greater than 5 MHz for photocurrents of 100 μA and above. The high bandwidth of the feedback enables tight solid locking that is immune to vibrations and shock. The D2-212 is powered by a cable that plugs into the power connectors on any D2 series electronics module or into an ICE-PB1 board, depending on which system you purchased. | The D2-212 saturated absorption spectroscopy module provides error signals derived from saturated absorption spectroscopy of atomic rubidium, cesium, or potassium. It contains a vapor cell, internal temperature controller, a single photodetector, and optics. Temperature control stabilizes the number density of atoms in the cell.The photodiode output is shot-noise limited out to greater than 5 MHz for photocurrents of 100 μA and above. The high bandwidth of the feedback enables tight solid locking that is immune to vibrations and shock. The D2-212 is powered by a cable that plugs into the power connectors on any D2 series electronics module or into an ICE-PB1 board, depending on which system you purchased. |
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| =====Purchase Includes===== |
| * D2-212 Spectroscopy Module |
| * VPN00463 SMA cable (6ft) |
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===== Absolute Maximum Ratings ===== | ===== Absolute Maximum Ratings ===== |
=====Inputs, Outputs, and Controls===== | =====Inputs, Outputs, and Controls===== |
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<imgcaption front|>{{ :d2:d2-212:frontlegend.jpg?nolink |D2-212 Connectors}}</imgcaption> | <imgcaption front|>{{ :d2:d2-212:frontview-labeled-for-manual.jpg?nolink |D2-212 Connectors}}</imgcaption> |
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**Input Connector**** (****6-pin circular)** | **Input Connector**** (****6-pin circular)** |
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Power from the D2-series power bus or other power supply are made through a 6-pin circular connector ([[http://www.digikey.com/product-detail/en/HR10A-7R-6SB(73)/HR1608-ND/1095466?WT.srch=1&WT.medium=cpc&WT.mc_id=IQ59989287-VQ2-g-VQ6-40609413915-VQ15-1t1-VQ16-c|Hirose HR10A-7R-6SB]]) shown in <imgref front>. The pin definitions (pin numbers are marked on the connectors) are listed below. | Power from the D2-005 Power Supply, ICE-PB1 Power Buss, or other power supply are made through a Hirose 6-pin circular connector ([[http://www.digikey.com/product-detail/en/HR10A-7TR-6SA/HR357-ND/510211|HR10A-7TR-6SA]]) shown in <imgref front> and <imgref hirose_pinout>. The pin definitions (pin numbers are marked on the connectors) are listed in <tabref connector>. |
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<WRAP center round box 500px> | <imgcaption hirose_pinout|Pin numbering on female Hirose 6-pin connector>{{ :d2:d2-160:hirose-connector.png?200 }}</imgcaption> |
^ Pin ^ Input Voltage ^ Max Current Draw ^ Notes ^ | |
| 1 | +5V | 1.5A | | | <WRAP center round box 900px><tabcaption connector> |
| 2 | No Connect | | | | ^ Hirose Pin ^ DB-9 Pin (if applicable) ^ Input Voltage ^ Max Current Draw ^ Notes ^ |
| 3 | +5V Ground | | Return path for high current +5V. | | | 1 | 4 and 5 | Signal Power Ground | | Return path for power rail. | |
| 4 | Signal Ground | | Return path for voltages on pins 5 & 6. | | | 2 | 8 | -15 V | 100mA | See note below. | |
| 5 | -15 V | 100mA | See note below. | | | 3 | 9 | +15 V | 100 mA | See note below. | |
| 6 | +15V | 100mA | See note below. | | | 4 | 6 and 7 | +5 V | 1.5 A / 2.5 A | 2.5 A max with Doppler subtraction option, 1.5 A max without. | |
| | 5 | | No Connect | | | |
| | 6 | 1 and 2 | +5 V Ground | | Return path for high current +5V. | |
| </tabcaption></WRAP> |
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<wrap lo>**Note:** See D2-005 manual for pin out on D-Sub 9-pin connector.</wrap> | |
</WRAP> | |
**Signal Output (SMA)** | **Signal Output (SMA)** |
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The extent of the trim range can be determined by probing the location shown in <imgref trimpots2> with a voltmeter referenced to case ground (the outer shell of the SMA connector is a good reference point). Probing this location gives the wiper voltage of the trimpot which corresponds to temperature as shown in the table below. This 10-turn trim pot sets temperature from 15°C (fully CCW) to 75°C (10 turns CW). The 5-turn point is approximately 42°C. The following table gives approximate temperature settings for the three available alkali options: | The extent of the trim range can be determined by probing the location shown in <imgref trimpots2> with a voltmeter referenced to case ground (the outer shell of the SMA connector is a good reference point). Probing this location gives the wiper voltage of the trimpot which corresponds to temperature as shown in the table below. This 10-turn trim pot sets temperature from 15°C (fully CCW) to 75°C (10 turns CW). The 5-turn point is approximately 42°C. The following table gives approximate temperature settings for the three available alkali options: |
<WRAP center round box 300px> | <WRAP center round box 300px><tabcaption temperature> |
^ Alkali ^ Turns CW ^ Wiper Voltage ^ Temp ^ | ^ Alkali ^ Turns CW ^ Wiper Voltage ^ Temp ^ |
| cesium | 2 | 6.8V | ~30°C | | | cesium | 2 | 6.8V | ~30°C | |
| rubidium | 4-5 | 5.7V | ~40°C | | | rubidium | 4-5 | 5.7V | ~40°C | |
| potassium | 8-9 | 3.9V | ~60°C | | | potassium | 8-9 | 3.9V | ~60°C | |
</WRAP> | </tabcaption></WRAP> |
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**Window Offset Adjustment** | **Window Offset Adjustment** |