d2:quick_start
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d2:quick_start [2015/04/27 19:36] – [Cabling & Power] 107.193.48.218 | d2:quick_start [2018/10/05 21:21] – [Quick Setup Instructions] Michael Radunsky | ||
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+ | ====== Quick Setup Instructions ====== | ||
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- | ====== Quick Setup Instructions ====== | + | Document Last Updated on ~~LASTMOD~~ |
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+ | Link to [[http:// | ||
===== Electronic Modules Initial Setup ===== | ===== Electronic Modules Initial Setup ===== | ||
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Place the three electronics modules (System Power, Laser Controller, and Laser Servo) in a row as shown on the right (order is not important). | Place the three electronics modules (System Power, Laser Controller, and Laser Servo) in a row as shown on the right (order is not important). | ||
- | On the back of the modules, attach the two 9-pin D-sub cables across adjacent modules. See picture | + | On the back of the modules, attach the two 9-pin D-sub cables across adjacent modules. |
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On the Laser Controller, in the bottom left corner, make sure that the LASER switch is in the OFF/RESET (down) position. | On the Laser Controller, in the bottom left corner, make sure that the LASER switch is in the OFF/RESET (down) position. | ||
Make sure the power switch on the System Power module is in the OFF (down) position. Plug power cable into back of System Power module. | Make sure the power switch on the System Power module is in the OFF (down) position. Plug power cable into back of System Power module. | ||
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===== Optic Modules Initial Setup ===== | ===== Optic Modules Initial Setup ===== | ||
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- | Place the Laser Module on an optics table and bolt to table with 4 1/4-20 screws. | + | Place the Laser Module on an optics table and bolt to table with (4) 1/4-20 screws. |
- | Align the Spectroscopy Module to the Laser Module, but if using a D2-110 place Spectroscopy Module at least 3” away from the DBR Module. The magnetically shielded D2-210 may be placed closer to the Laser Module. | + | Align the Spectroscopy Module to the Laser Module. (If using a D2-110, place Spectroscopy Module at least 3” away from the DBR Module.) The magnetically shielded D2-210 may be placed closer to the Laser Module. |
To help with optical alignment, loosen the four screws that hold each module and gently register the modules by pushing against the screws in the same direction. (This is how they were aligned at Vescent.) | To help with optical alignment, loosen the four screws that hold each module and gently register the modules by pushing against the screws in the same direction. (This is how they were aligned at Vescent.) | ||
===== Cabling & Power ===== | ===== Cabling & Power ===== | ||
+ | <WRAP center round important 60%> | ||
- | Locate the 6ft connector cable assembly. Plug the SMA connector into the LASER CURRENT OUTPUT plug and the Hirose connector into the LASER TEMP OUTPUT on the Laser Controller. Make sure that the nearby Laser switch is in the OFF/RESET position (down). While grounded, remove the SMA terminator connected to the Laser. Connect the other end of the SMA cable and Hirose connectors to the DBR module. | + | Never connect any device to the D2-005 power supply when it is switched on and supplying power. |
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+ | Locate the 6 ft connector cable assembly | ||
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- | Find the 6ft SMA / BNC cable and Hirose connector cable assembly. Plug the BNC end into the ERROR INPUT on the Laser Servo. Plug the SMA end into the Spectroscopy Module. | + | Find the 6 ft cable assembly with an SMA on one end and a BNC connector on the other. |
- | Take one short (~1ft) BNC cable and connect it from the CURRENT SERVO INTPUT on the Laser Controller to the SERVO OUTPUT on the Laser Servo. | + | Take one short (~1 ft) BNC cable (not included) |
- | For Peak-Lock Only: Connect one short (~1ft) BNC from the RF INPUT on the Laser Controller to the RF OUTPUT on the Laser Servo. | + | For Peak-Lock Only: Connect one short (~1 ft) BNC cable (not included) |
- | Flip the switch on the System Power Module to the ON position. Three LED's (+5V, +15V, -15V) on the System Power modules should glow blue. | + | Flip the switch on the System Power Module to the ON position. Three LED's (+5 V, +15 V, -15 V) on the System Power modules should glow blue. |
- | Both the Laser Controller module and the Laser Servo module should have a blue LED glowing next to the label POWER. If not, check that the power cables are properly connected on the back. | + | Both the Laser Controller module and the Laser Servo module should have a blue LED glowing next to the label POWER. If not, check that the power cables, safety key, and interlock |
===== Laser Controller ===== | ===== Laser Controller ===== | ||
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===== Laser Servo ===== | ===== Laser Servo ===== | ||
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- | On the Laser Servo, place the LASER STATE switch into the RAMP position. Turn the RAMP AMP knob to max (clockwise). Connect a BNC cable from RAMP TTL on the **back** of the Laser Servo to the trigger input on your oscilloscope. Set trigger to // | + | On the Laser Servo, place the LASER STATE switch into the RAMP position. Turn the RAMP AMP knob to max (clockwise). Connect a BNC cable from RAMP TTL on the **back** of the Laser Servo to the trigger input on your oscilloscope. Set the trigger |
- | You should see the apropriate | + | You should see the appropriate |
- | If you don’t see the hyperfine transitions, | + | If you don’t see the hyperfine transitions, |
- | If you still cannot | + | If you have a D2-110 and you still cannot |
- | + | <WRAP right round box 460px> | |
- | <WRAP right round box 360px> | + | [{{ :d2:d2-210:d2-210_top.jpg?400|Inside the D2-210 Spectroscopy Module}}] |
- | [{{ {{:d2:quick_start:d2_110_inside.jpg?nolink& | + | [{{ : |
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If you still cannot get the right signal strength, see the full instructions on aligning the spectroscopy module in [[http:// | If you still cannot get the right signal strength, see the full instructions on aligning the spectroscopy module in [[http:// | ||
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Connect a BNC cable from RAMP TTL on the **back** of the Laser Servo to the trigger input on your oscilloscope. Set trigger to // | Connect a BNC cable from RAMP TTL on the **back** of the Laser Servo to the trigger input on your oscilloscope. Set trigger to // | ||
- | Adjust the Coarse and Fine Current controls on the Laser Controller to place a transition peak at the center of the oscilloscope screen. Reduce the ramp amplitude so you can clearly see the hyperfine transitions (adjust fine current as necessary). As you lower the ramp amplitude and bring it back, you will see the spectroscopy on the oscilloscope expand and contract about a single point on the oscilloscope. The point should be near the center of the oscilloscope. Adjust the horizontal position on the oscilloscope to put this point in the //**exact middle**// of the oscilloscope screen. If you move the spectroscopy so that a hyperfine peak is centered on the oscilloscope, | + | Adjust the Coarse and Fine Current controls on the Laser Controller to place a transition peak at the center of the oscilloscope screen. Reduce the ramp amplitude so you can clearly see the hyperfine transitions (adjust fine current as necessary). As you lower the ramp amplitude and bring it back, you will see the spectroscopy on the oscilloscope expand and contract about a single point on the oscilloscope. The point should be near the center of the oscilloscope. Adjust the horizontal position on the oscilloscope to put this point in the //**exact middle**// of the oscilloscope screen. If you move the spectroscopy so that a hyperfine peak is centered on the oscilloscope, |
==== Side Lock ==== | ==== Side Lock ==== | ||
- | Note: The laser locks to the point where DC ERROR crosses zero voltage with a // | + | Note: The laser locks to the point where DC ERROR crosses zero voltage with a // |
- | Adjust the laser current and ramp amplitude so you can clearly see the transition | + | Adjust the laser current and ramp amplitude so you can clearly see the transition |
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You will see that while near a transition the value of DC ERROR moves up and down slightly as the ramp value is changed. Lower the ramp until this effect is gone. When setting the DC error value, set the ramp to sweep just over the desired transition (~20 MHz) and no more. The desired transition should occupy most of the screen. Adjust the DC Offset knob until the desired lock point is at zero volts. | You will see that while near a transition the value of DC ERROR moves up and down slightly as the ramp value is changed. Lower the ramp until this effect is gone. When setting the DC error value, set the ramp to sweep just over the desired transition (~20 MHz) and no more. The desired transition should occupy most of the screen. Adjust the DC Offset knob until the desired lock point is at zero volts. | ||
- | Optional: For long term frequency stability on side lock, monitor ERROR IN on the oscilloscope, | + | Optional |
Center the spectroscopy such that the lock point is exactly in the center of the oscilloscope. Flip the lock switch on the right from RAMP to LOCK. The DC error signal should now be reading 0V with visible noise. | Center the spectroscopy such that the lock point is exactly in the center of the oscilloscope. Flip the lock switch on the right from RAMP to LOCK. The DC error signal should now be reading 0V with visible noise. | ||
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If the laser did not properly lock, try lowering the gain and attempting again. If you still cannot lock the laser, see the Laser Lock trouble-shooting section in the [[d2: | If the laser did not properly lock, try lowering the gain and attempting again. If you still cannot lock the laser, see the Laser Lock trouble-shooting section in the [[d2: | ||
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==== Peak Lock ==== | ==== Peak Lock ==== | ||
d2/quick_start.txt · Last modified: 2021/08/26 15:26 by 127.0.0.1