d2:spectroscopy_module_210
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d2:spectroscopy_module_210 [2016/08/30 13:21] – [Spectroscopy Module] Michael Radunsky | d2:spectroscopy_module_210 [2020/03/16 22:17] – [Theory of Operation] Michael Radunsky | ||
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* D2-210 Spectroscopy Module | * D2-210 Spectroscopy Module | ||
* VPN00463 SMA cable (6ft) | * VPN00463 SMA cable (6ft) | ||
- | Also look for: | ||
* VPN00410 Hirose-to-D Sub 9-pin (shipped under separate line item; specify for use with D2) | * VPN00410 Hirose-to-D Sub 9-pin (shipped under separate line item; specify for use with D2) | ||
* VPN00475 Hirose-to-Hirose power cord (shipped under separate line item; specify for use with ICE) | * VPN00475 Hirose-to-Hirose power cord (shipped under separate line item; specify for use with ICE) | ||
+ | * VPN00367 Adjustment tool | ||
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Note: All modules designed to be operated in laboratory environment | Note: All modules designed to be operated in laboratory environment | ||
- | <WRAP center round box 60%> | + | <WRAP center round box 60%>< |
| **Parameter** | **Rating** | | | **Parameter** | **Rating** | | ||
|Environmental Temperature | >15°C and <30°C| | |Environmental Temperature | >15°C and <30°C| | ||
|Environmental Humidity | <60% | | |Environmental Humidity | <60% | | ||
|Environmental Dew Points | <15°C | | |Environmental Dew Points | <15°C | | ||
- | </ | + | </ |
=====Specifications===== | =====Specifications===== | ||
- | <WRAP center round box 500px> | + | <WRAP center round box 500px>< |
- | ^ ^ Value ^ Units ^ | + | ^ ^ Value ^ Units |
- | ^**Input Light Level** | + | ^ **Input Light Level** |
- | ^**Photodiode Amplifier** | + | ^ **Photodiode Amplifier** |
- | | < | + | | Transimpedance (signal) |
- | | < | + | | Bandwidth (signal) |
- | | < | + | | Noise @ 5 MHz | < |
- | ^Set Temperature | + | ^ Set Temperature |
- | ^Temperature Stability| | + | ^ Temperature Stability |
- | ^Beam Height| | + | ^ Beam Height |
- | ^For Hirose to DB9 Power Cable | +5V (pin 4 on Hirose to pins 6 & 7 on DB9), GND (pin 6 on Hirose to pins 1 & 2 on DB9) | Hirose | + | ^ Total package Size \\ (L x W x H) | 3.6 x 5 x 1.7 | inches |
- | ^Total package Size \\ (L x W x H)| 3.6 x 5 x 1.7 | inches | + | </ |
</ | </ | ||
===Powering the D2-210=== | ===Powering the D2-210=== | ||
- | The D2-210 requires +5 and ±15 VDC and ground to operate. | + | The D2-210 requires +5 and ±15 VDC and ground to operate. |
- | + | ||
- | If you are using the DB9-to-Hirose cable, but not a Vescent D2-005 power supply, the table above details which pins on the DB9 require which voltages. | + | |
- | < | + | If you are using the DB9-to-Hirose |
=====Theory of Operation===== | =====Theory of Operation===== | ||
<WRAP center round box 620px> | <WRAP center round box 620px> | ||
- | [{{ : | + | < |
- | <WRAP center round box 420px> | + | <WRAP center round box 420px>< |
Input light passes through an adjustable λ/2 waveplate and polarizing beamsplitter (PBS) that directs a user-controlled portion of the beam to the vapor cells and detectors. | Input light passes through an adjustable λ/2 waveplate and polarizing beamsplitter (PBS) that directs a user-controlled portion of the beam to the vapor cells and detectors. | ||
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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 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 beam diameters were designed to provide enough photocurrent (~50-100μA) to give shot-noise-limited performance out to 5 MHz while limiting saturation broadening. | + | 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. |
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**Input Connector**** (****6-pin circular)** | **Input Connector**** (****6-pin circular)** | ||
+ | <WRAP center round important 60%> | ||
+ | </ | ||
+ | |||
+ | Power and temperature control signals from the D2-series power bus, the ICE-PB1, or other power supply are made through a 6-pin circular connector ([[http:// | ||
- | Power and temperature control signals from the D2-series power bus or other power supply are made through a 6-pin circular | + | < |
- | <WRAP center round box 500px> | + | <WRAP center round box 900px>< |
- | ^ Pin ^ Input Voltage | + | ^ |
- | | 1 | Signal Ground | + | | 1 |
- | | 2 | -7V to -15 V | 100mA | See note below. | | + | | 2 |
- | | 3 | +7V to +15V | + | | 3 |
- | | 4 | +5V | + | | 4 |
- | | 5 | No Connect | + | | 5 |
- | | 6 | +5V Ground | + | | 6 |
- | </ | + | </ |
<wrap lo> | <wrap lo> | ||
<wrap lo> See D2-005 manual for pin out on D-Sub 9-pin connector.</ | <wrap lo> See D2-005 manual for pin out on D-Sub 9-pin connector.</ | ||
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10-turn trim pot that sets temperature from 25°C (fully CCW) to 65°C (10 turns CW). The 5-turn point is approximately 42°C. | 10-turn trim pot that sets temperature from 25°C (fully CCW) to 65°C (10 turns CW). The 5-turn point is approximately 42°C. | ||
- | <WRAP center round box 300px> | + | <WRAP center round box 300px>< |
^ Alkali ^ Turns CW ^ Temp ^ | ^ Alkali ^ Turns CW ^ Temp ^ | ||
| cesium | 2 | ~30°C | | cesium | 2 | ~30°C | ||
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| potassium | 8-9 | ~60°C | | potassium | 8-9 | ~60°C | ||
- | </ | + | </ |
**Temperature Loop Gain Adj.** | **Temperature Loop Gain Adj.** | ||
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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. | + | [Note: this adjustment is only available on older D2-210 models.] |
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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**Tilt Plate** | **Tilt Plate** | ||
- | A polarizing beamsplitter (PBS) is fixed to a ball joint formed by a truncated steel ball held by a conformal brass ring. Two cone screws clamp the ring against the ball and fix the position of the PBS. See Alignment Procedure below for instructions on how to align and fix the PBS.{{ : | + | A polarizing beamsplitter (PBS) is fixed to a ball joint formed by a truncated steel ball held by a conformal brass ring. Two cone screws clamp the ring against the ball and fix the position of the PBS. See Alignment Procedure below for instructions on how to align and fix the PBS.<WRAP center round box 420px> |
+ | |||
+ | < | ||
**λ/2 Waveplate** | **λ/2 Waveplate** | ||
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A waveplate attached to the front plate by magnets can be used to select the splitting fraction of the Tilt Plate PBS. | A waveplate attached to the front plate by magnets can be used to select the splitting fraction of the Tilt Plate PBS. | ||
- | {{ : | + | <WRAP center round box 420px> |
+ | |||
+ | < | ||
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- | The following images are representative of spectroscopy for < | + | The following images are representative of spectroscopy for < |
+ | < | ||
- | {{ : | + | < |
- | {{ : | + | < |
d2/spectroscopy_module_210.txt · Last modified: 2024/03/27 15:58 by Thomas Bersano