Related Manuals for Vescent Photonics D2-105
Summary of Contents for Vescent Photonics D2-105
- Page 1 Laser Controller Vescent Photonics, Inc. www.vescentphotonics.com 4865 E. 41 Denver, CO 80216 Phone: (303)-296-6766 Fax: (303)-296-6783...
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Page 3: General Warnings And Cautions
WARNING Do not clean outside surfaces of any Vescent Photonics products with solvents such as acetone. Front panels on electronics modules may be cleaned with a mild soap and water solution. -
Page 5: Limited Warranty
Limited Warranty Vescent Photonics warrants this product to be free from defects in materials and workmanship for a period of one year from the date of shipment. If this product proves defective during the applicable warranty period, Vescent Photonics, at its option, either will repair the defective product without charge or will provide a replacement in exchange for the defective product. -
Page 6: Absolute Maximum Ratings
Absolute Maximum Ratings Note: All modules designed to be operated in laboratory environment Parameter Rating Environmental Temperature >15°C and <30°C Environmental Humidity <60% Environmental Dew Point <15°C... - Page 7 Vescent Photonics D2 Series Product Manual Laser Controller Model No. D2-105 / D2-105-500 Document Revision: 4 1.1. Description The laser controller has two temperature controllers capable of sub-mK stability and a 200 mA or 500 mA precision current source based on the Libbrecht-Hall circuit.
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Page 8: Specifications
Vescent Photonics D2 Series Product Manual 1.2. Specifications D2-105 D2-105-500 Units Current Source Current range 0-200 0-500 Current noise density <100 <200 RMS Noise (10Hz - 100kHz) <50 <100 RMS Noise (10Hz - 1MHz) <100 <150 RMS Noise (10Hz - 10MHz) <300... -
Page 9: Inputs, Outputs, And Controls
Laser Laser Laser Laser Laser Laser Current Current Current Temp Temp Temp Laser Laser Laser Model: D2-105 Model: D2-105 Model: D2-105 Output Output Output Output Output Output Vescent Photonics, Inc. Vescent Photonics, Inc. Vescent Photonics, Inc. off/reset off/reset off/reset Denver, Colorado USA... -
Page 10: Current Control
The current servo input adds or subtracts current though 1 k Ω connected to the laser diode giving a modulation coefficient of 1 mA/V. A bias circuit sets the voltage of the current servo input to 1mA resolution with D2-105-500... -
Page 11: Temperature Control
Vescent Photonics D2 Series Product Manual zero volts. (Normally, a connection to the laser diode would place this voltage at ~ 2V or equal to the forward diode drop.) Therefore, leaving the input open or grounded does not alter the current to the laser diode. - Page 12 (-1°C) to the high temperature limit (58°C). NOTE that the Vescent Photonics Lasers should not be operated above 50°C. The slope for changing the setpoint is ~-600 mK/V.
- Page 13 Vescent Photonics D2 Series Product Manual 1.3.4. Back panel I/O Power I/O (9-pin D-sub) The power to each electronics module is through a 9-pin D-sub connecter through a power bridge unit. The unit can also be powered through any serial cable with 9-pin D-sub connectors, which is convenient when the unit must be taken out of line for access to the side panels.
- Page 14 Vescent Photonics D2 Series Product Manual 1.4. Turning on the Laser Diode In compliance with FDA requirements for a Class 3B laser, the Laser Controller has two safety interlocks. If either interlock is tripped, the laser will turn off and stay off until the interlocks are reset AND the laser switch is switched from the “off / reset”...
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Page 15: Transfer Function
Vescent Photonics D2 Series Product Manual 1.5.1. Transfer Function and Poles Each stage of temperature control has a transfer function shown below: Transfer Function Transfer Function ω ω ω ω ω ω Frequency Frequency The three poles (ω , ω... - Page 16 Vescent Photonics D2 Series Product Manual Figure 1: Side Panel Adjustments for Temperature Control. 1.5.2. User Control of the Poles and Gain If you remove the right side panel on the Laser Controller, for each stage of temperature control, you will see the panel shown in Figure 1.
- Page 17 Vescent Photonics D2 Series Product Manual running the tuning procedure while the laser is on. For each stage, follow the steps below to tune the plants according to the Ziegler-Nichols tuning method: 1) Connect thermal load to Laser Controller. 2) Place Loop in proportional-only mode: Switch labeled “Proportional” is on, switch labeled “Diff On”...
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