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PDB771C: OEM Balanced Amplified Detector
F
EATURES
· Complete Balanced Detector Module on
PCB for Flexible Integration
· Small Size: 45.0 mm x 25.0 mm x 7.0 mm
(1.77" x 0.99" x 0.28")
· 50 cm Input Fiber with FC/APC Connectors
and Well-Matched Lengths
· Customized Specifications Available Upon Request:
Bandwidth, Gain, Fiber Length, Connector
· Ready-to-Use Evaluation Board
A
PPLICATIONS
· OEM Applications Requiring Balanced Amplified Detection
· LIDAR
· OCT
· Optical Time Domain Reflectometry (OTDR)
D
ESCRIPTION OF
The PDB771C is a small high-speed, InGaAs balanced amplified photodetector mounted on a PCB for integration
in systems.
It consists of two length-matched 50 cm fibers with FC/APC connectors that direct the signal to fiber-coupled pho-
todiodes. An ultra-low noise, ultra-low distortion high-speed transimpedance amplifier generates an output voltage
(RF OUTPUT) at bandwidth of DC to 400 MHz. The output voltage is proportional to the difference between the
photocurrent in the two photodiodes, i.e. the two optical input signals. Additionally, the unit has two monitor outputs
(MONITOR+ and MONITOR-) to measure the individual optical input power level as well as low frequency (up to
150 kHz) modulated signals. The PDB771C is best suited for applications in the 980 - 1625 nm wavelength range.
For flexible integration, the PDB771C can be soldered to a custom PCB designed for the PDB771C for signal ex-
port and mounting. Please find detailed instructions under
anced photodetectors carry the same layout.
Alternatively, Thorlabs offers a PDB evaluation board PDBEVAL1, which provides a PCB layout matching all
PDB77xC detectors. This evaluation board supplies power via a Thorlabs
signal output via SMA connectors.
Customized versions for different bandwidths or with different connectors are available upon request.
· PDB771C
Complete Balanced Amplified Photodetector for OEM System Integration; Wavelength Range:
980 nm to 1625 nm
MTN022351-S01
Rev. 1.0, Monday, December 7, 2020
PDBEVAL1
Available
M
ODEL
www.thorlabs.com/contact
System Integration
and Mounting. All PDB77xC bal-
LDS12B
PDB771C
power supply (not included) and
PDB771C
PAGE 1 OF 8
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Table of Contents
Related Manuals for THORLABS PDB771C
Summary of Contents for THORLABS PDB771C
- Page 1 (MONITOR+ and MONITOR-) to measure the individual optical input power level as well as low frequency (up to 150 kHz) modulated signals. The PDB771C is best suited for applications in the 980 - 1625 nm wavelength range. For flexible integration, the PDB771C can be soldered to a custom PCB designed for the PDB771C for signal ex- port and mounting.
-
Page 2: Maximum Rating
Values do not consider losses introduced by the FC/APC connectors (typically 0.15 to 0.35 dB). Values are given for high- impedance load. For a 50 Ω load, divide the value by 2. For more information on NEP, please see Thorlabs' Noise Equivalent Power White Paper. -
Page 3: Pin- Out Diagram
45.0 mm x 25.0 mm x 7.0 mm (1.77" x 0.99" x 0.28") Weight 0.02 kg IAGRAM Description OUTPUT MONITOR + RF-OUTPUT Power supply: -9 to -12 V Power supply: +9 to +12 V MONITOR - MTN022351-S01 PDB771C www.thorlabs.com/contact Rev. 1.0, Monday, December 7, 2020 PAGE 3 OF 8... - Page 4 ECHANICAL RAWING Bottom View PDB771C Top View PDB771C MTN022351-S01 PDB771C www.thorlabs.com/contact Rev. 1.0, Monday, December 7, 2020 PAGE 4 OF 8...
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Page 5: Operating Elements
All soldering must be done by hand; a reflow oven will damage the device. Mounting To mount the PDB771C, the mounting pins on either side of the bottom of the PDB771C can be inserted into de- signed holes in the custom PCB. Please see section Dimensions for precise position of the mounting pins. -
Page 6: Operational Sequence
6. Repeat steps 2 through 4 for each of the 18 contacts. Operational Sequence Once the PDB771C is mounted and soldered to a custom PCB or PDBEVAL1, it is ready for operation. 1. Connect the PDB771C to a power supply using the respective connectors. - Page 7 Thorlabs. Attention Prior to applying power to the PDB771C, 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! All modules must only be operated with duly shielded connection cables.
- Page 8 ANUFACTURING AND OMPLIANCE Manufactured by: Thorlabs GmbH, Münchner Weg 1, 85232 Bergkirchen, Germany All specifications are subject to change without notice. MTN022351-S01 PDB771C www.thorlabs.com/contact Rev. 1.0, Monday, December 7, 2020 PAGE 8 OF 8...
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