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Related Manuals for THORLABS PDB835C
Summary of Contents for THORLABS PDB835C
- Page 1 PDB835C, PDB835C-AC Balanced Amplified Photodetectors User Guide 2022...
- Page 2 Version: Date: 12-Dec-2022 Copyright © 2022 Thorlabs...
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Page 3: Table Of Contents
PDB835C, PDB835C-AC Balance Amplified Photodetectors Table of Contents Chapter 1 Safety Chapter 2 Introduction Ordering Codes and Accessories Chapter 3 Getting Started Parts List Chapter 4 Operating Instructions Operating Elements Mounting Setup Optical Input Electrical Output 4.5.1 AC Coupling of the Outputs... -
Page 4: Safety
Thorlabs. Attention Prior to applying power to the PDB835C or PDB835C-AC, make sure that the protective conductor of the 3 conductor mains power cord is correctly connected to the protective earth ground contact of the socket outlet! Improper grounding can cause electric shock resulting in damage to your health or even death! -
Page 5: Introduction
(RF OUTPUT) proportional to the difference between the photo current in the two photodiodes, i.e. the two optical input signals. The PDB835C and PDB835C-AC excel in that they are artifact free devices and thus ideal for OCT. -
Page 6: Operating Instructions
Top and Bottom 4.2 Mounting Housing The PDB835C and PDB835C-AC are housed in a rugged, shielded, 76.7 mm x 60.0 mm x 20.0 mm alu- minum enclosure. Mounting PDB835C and PDB835C-AC on an Optical Table Mount the PDB835C or PDB835C-AC on an optical post by using either of the three tapped combi thread mounting holes on the top and bottom. -
Page 7: Setup
Note Prior to operation, please check if the indicated line voltage range on the LDS12B power supply matches with your local mains voltage! If you choose to use your own power supply, Thorlabs offers a power con- nector cable. Carefully unpack the unit and accessories. If any damage is noticed, do not use the unit. Contact ·... -
Page 8: Electrical Output
(CMRR). The PDB835C(-AC) detectors can be used in balanced mode (both inputs are illuminated) as well as in single detector mode. In single detector mode, the RF OUTPUT swing depends on which INPUT is used: it is positive for INPUT+ and negative for INPUT-. -
Page 9: Ac Coupling Of The Outputs
In the setup as described below, the Device under Test (DuT) - here a PDB835C balanced detector - is tested for CMRR. A common mode signal is generated, which is canceled out when the amplifier is in bal- anced mode. -
Page 10: Recommendations
Thorlabs PDB835C and PDB35C-AC Balanced Amplified Photodetectors can eliminate noise sources to al- low precise measurements. The PDB835C and PDB35C-AC are designed to be used in a dual beam setup: one optical path for measurement and one invariant reference path. If set up properly, the PDB835C and PDB35C-AC can reduce common mode noise for more than 35 dB over the specified frequency range. - Page 11 (see Thorlabs parts TRE or TRE/M) will suppress electrical noise coupling. Always try to identify the electrical noise sources and increase the distance to the PDB835C and PDB35C-AC balanced detectors. Different common ground points can also be tested.
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Page 12: Specifications
) Value is given for high-impedance load. For a 50 Ω load, divide the value by 2. ) Given at detector peak responsivity. ) non-condensing ) Weight of the PDB835C and PDB835C-AC, excluding all shipped accessories. All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing) Page 9... -
Page 13: Performance Plots
PDB835C, PDB835C-AC Balance Amplified Photodetectors Chapter 5 Specifications 5.1 Performance Plots This plot shows the responsivity for PDB835C and PDB835C-AC. This plot shows the typical frequency response for PDB835C and PDB835C-AC. Rev: 1.0, 12-Dec-2022 © 2022 Thorlabs Page 10... - Page 14 PDB835C, PDB835C-AC Balance Amplified Photodetectors Chapter 5 Specifications This plot shows the typical RF-Output spectral noise for PDB835C. This plot shows the typical noise equivalent power (NEP) over the frequency range for PDB835C. Page 11 MTN030245-D02...
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Page 15: Dimensions
5.2 Dimensions Chapter 6 Maintenance and Service Protect the PDB835C and PDB35C-AC from adverse weather conditions. The PDB835C and PDB35C-AC is not water resistant. Attention To avoid damage to the instrument, do not expose it to spray, liquids or solvents! The unit does not need regular maintenance by the user. -
Page 16: Certifications And Compliances
PDB835C, PDB835C-AC Balance Amplified Photodetectors Chapter 7 Certifications and Compliances Chapter 7 Certifications and Compliances Page 13 MTN030245-D02... -
Page 17: Warranty And Rma Information
Chapter 8 Warranty and RMA Information Thorlabs warrants material and production of the PDB835C and PDB35C-AC for a period of 24 months starting with the date of shipment in accordance with and subject to the terms and conditions set forth in Thorlabs’... -
Page 18: Copyright And Liability
Chapter 10 Copyright and Liability Thorlabs has taken every possible care in preparing this document. We however assume no liability for the content, completeness or quality of the information contained therein. The content of this document is regularly updated and adapted to reflect the current status of the product. -
Page 19: Thorlabs Worldwide Contacts
PDB835C, PDB835C-AC Balance Amplified Photodetectors Chapter 10 Copyright and Liability Chapter 11 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.
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