"; _cf_contextpath=""; _cf_ajaxscriptsrc="/cfthorscripts/ajax"; _cf_jsonprefix='//'; _cf_websocket_port=8578; _cf_flash_policy_port=1244; _cf_clientid='B0AAECB01051FEF004CABA0D377B2ECA';/* ]]> */
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Compact Balanced Amplified Photodetectors![]()
PDB780CAC 2.5 GHz Balanced Amplified Detector with FC/APC Connectors 100.0 mm 80.0 mm PDBEVAL1 Evaluation Board for the PDB77xC and PDB78xCAC Detectors Application Idea The PDB770C 400 MHz Balanced Detector soldered to the PDBEVAL1 Evaluation Board. An ADAFCB4 Fiber Bracket (not included) is used to hold the detector's FC/APC connectors. ![]() Please Wait
Applications
Features
Thorlabs' Compact Balanced Amplified Photodetectors are high-speed InGaAs detectors with a small footprint specifically designed for OEM applications. With a common mode rejection ratio (CMRR) of >20 dB, these detectors are ideal for techniques requiring high sensitivity, such as LIDAR, OCT, and optical frequency domain reflectometry. Detectors operate over the 980 nm to 1625 nm or 1260 nm to 1625 nm wavelength ranges and are available with bandwidths of 400 MHz or 2.5 GHz. Detailed performance specifications can be found by clicking on the blue info icons ( Mounting and External Connection Please note that the components inside these modules are ESD sensitive. Take all appropriate precautions to discharge personnel and equipment before making any electrical connections to the unit. All soldering must be done by hand; a reflow oven will damage the device. Packaged Balanced Amplified Photodetectors ![]() Click to Enlarge External pin Connections for the PDB780CAC Balanced Detector. The pin connections are the same for all PDB781CAC detectors. ![]() Click to Enlarge External pin Connections for the PDB770C Balanced Detector. The pin connections are the same for the PDB771C detectors.
OperationThorlabs' Balanced Amplified Photodetectors consists of two well-matched photodiodes and an ultra-low-noise, high-speed transimpedance amplifier (TIA) that generates an output voltage (RF OUTPUT) proportional to the difference between the photocurrents in the two photodiodes (i.e., the two optical input signals). Additionally, each unit has two 150 kHz monitor outputs (MONITOR+ and MONITOR-) to observe the optical input power levels at each photodiode separately. These outputs are low-frequency outputs and cannot be used to measure an RF modulation on the signal. ![]() Click to Enlarge Dimensions for the bottom view of the PDB770C Balanced Amplified Detector. The dimensions are the same for all PDB77xC and PDB78xCAC detectors. ![]() Click to Enlarge Dimensions for the top view of the PDB770C Balanced Amplified Detector. The dimensions are the same for all PDB77xC and PDB78xCAC detectors.
![]() ![]() ![]() ![]() Click to Enlarge A PDB770C balanced amplified detector soldered to a PDBEVAL1 evaluation board. An ADAFCB4 fiber bracket and two plastic clamps are used to mount the fibers. ![]() Click to Enlarge Top View of the PDBEVAL1 Evaluation Board
The PDBEVAL1 Evaluation Board allows the user to solder the PDB77xC and PDB78xCAC balanced detectors in place so that power and output connections can be made with common cables and connectors. The half-via contacts around the perimeter of the detector can be soldered to the pre-defined contact points on the evaluation board. The board also features three SMA connectors for the monitor and output signals, as well as a screw terminal block and power cable connector for the power supply. The evaluation board also has a slot for an optional ADAFCB4 fiber mounting bracket. The components inside the detector modules are ESD sensitive. Take all appropriate precautions to discharge personnel and equipment before making any electrical connections to the unit. All soldering must be done by hand; a reflow oven will damage the device. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|