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Summary of Contents for THORLABS PDA25K2
- Page 1 PDA25K2 GaP Switchable Gain Detector User Guide...
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Page 2: Table Of Contents
4.6. Gain Adjustment ............5 Chapter 5 Troubleshooting ............... 6 Chapter 6 Specifications ..............7 6.1. Response Curve ............. 9 6.2. Mechanical Drawing ........... 10 Chapter 7 Certificate of Conformance ........... 11 Chapter 8 Regulatory ............... 12 Chapter 9 Thorlabs Worldwide Contacts........13... -
Page 3: Chapter 1 Warning Symbol Definitions
GaP Switchable Gain Detector Chapter 1: Warning Symbol Definitions Chapter 1 Warning Symbol Definitions Below is a list of warning symbols you may encounter in this manual or on your device. Symbol Description Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or chassis Terminal... -
Page 4: Chapter 2 Description
10 dB steps. A buffered output drives 50 Ω load impedances up to 5 V. The PDA25K2 housing includes a removable threaded coupler (SM1T1) and retaining ring (SM1RR) that is compatible with any number of Thorlabs 1″... -
Page 5: Chapter 3 Setup
Attach a 50 Ω coax cable (i.e. RG-58U) to the output of the PDA. When running cable lengths longer than 12" we recommend terminating the opposite end of the coax with a 50 Ω resistor (Thorlabs Item # T4119) for maximum performance. Connect the remaining end to a measurement device such as an oscilloscope or high speed DAQ card. -
Page 6: Chapter 4 Operation
Chapter 4 Operation 4.1. Theory of Operation Thorlabs PDA series are ideal for measuring both pulsed and CW light sources. The PDA25K2 includes a reverse-biased PIN photo diode, mated to a switchable gain transimpedance amplifier, and packaged in a rugged housing. -
Page 7: Bandwidth And Response
> 5 kΩ) and 5 V for 50 Ω loads. Adjust the gain so that the measured signal Load level out of the PDA25K2 is below 10 V (5 V with a 50 Ω load) to avoid saturation. For low terminating resistors, <5 kΩ or 1% error, an additional factor needs to be considered. -
Page 8: Chapter 5 Troubleshooting
GaP Switchable Gain Detector Chapter 5: Troubleshooting Chapter 5 Troubleshooting Problem Suggested Solutions Verify that the power is switched on and all connections are secure. Verify the proper terminating resistor is installed if using a Voltage measurement device. There is no signal response. Verify that the optical signal wavelength is within the specified wavelength range. -
Page 9: Chapter 6 Specifications
±12 mV (Max) ±12 mV (Max) The PDA25K2 has a 50 Ω series terminator resistor (i.e. in series with amplifier output). This forms a voltage divider with any load impedance (e.g. 50 Ω load divides signal in half). Tested at 405 nm wavelength. - Page 10 GaP Switchable Gain Detector Chapter 6: Specifications Electrical Specifications Detector Active Area 2.2 mm x 2.2 mm (4.8 mm λ Wavelength Range 150 to 550 nm λ Peak Wavelength 440 nm (Typ.) ( λ Peak Response 0.12 A/W (Typ.) Amplifier GBP 600 MHz 50 Ω...
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Page 11: Response Curve
GaP Switchable Gain Detector Chapter 6: Specifications 6.1. Response Curve PDA25K2 Responsivity 0.12 0.10 0.08 0.06 0.04 0.02 0.00 Wavelength (nm) Rev D, April 21, 2020 Page 9... -
Page 12: Mechanical Drawing
GaP Switchable Gain Detector Chapter 6: Specifications 6.2. Mechanical Drawing Page 10 TTN135012-D02... -
Page 13: Chapter 7 Certificate Of Conformance
GaP Switchable Gain Detector Chapter 7: Certificate of Conformance Chapter 7 Certificate of Conformance Rev D, April 21, 2020 Page 11... -
Page 14: Chapter 8 Regulatory
Waste Treatment is Your Own Responsibility If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site. -
Page 15: Chapter 9 Thorlabs Worldwide Contacts
GaP Switchable Gain Detector Chapter 9: Thorlabs Worldwide Contacts Chapter 9 Thorlabs Worldwide Contacts For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-date contact information. USA, Canada, and South America UK and Ireland Thorlabs, Inc. - Page 16 www.thorlabs.com...
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