THORLABS APD430 Series, Operation Manual

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© 2015 Thorlabs
1 General Information
3
1 General Information
The Thorlabs APD430x series of temperature-compensated Avalanche Photodetectors
combine a high sensitivity Si or InGaAs Avalanche Photodiode with a specially designed ultra-
low noise transimpedance amplifier for detection of optical signals from DC to 400 MHz.
APD430x series Avalanche Photodetectors have an exceptionally low NEP, making them ideal
for fast low-level light detection applications, such as spectroscopy, fluorescence
measurements, laser radar and optical rangefinders. Due to their very high sensitivity, the
APD430x series Avalanche Photodetectors can replace Photomultiplier Tubes (PMT) in many
applications. The Avalanche Photodetectors cannot be damaged by unwanted ambient light,
which is an advantage over many photomultiplier tubes.
The APD430x feature a continuously adjustable Gain that is based on the adjustment of the
APD's M factor. They also incorporate a special electronic circuit to compensate for the
temperature dependency of the M (multiplication) factor
The slim line housing includes a removable threaded coupler that is compatible with any of
Thorlabs 1” and ½” threaded accessories. This allows convenient mounting of external optics,
filters, apertures or fiber adapters. The APD430x has three tapped mounting holes.
The APD430x series is powered by the included external power supply (±12 V, 200 mA) via a
PICO M8 power connector.
1.1 Safety
Attention
All statements regarding safety of operation and technical data in this instruction manual
will only apply when the unit is operated correctly as it was designed for.
Prior to applying power to the APD430x, 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!
The APD430x must not be operated in explosion endangered environments!
High Voltage - do not remove covers!
Refer servicing to qualified personnel!
Only with written consent from Thorlabs may changes to single components be made or
components not supplied by Thorlabs be used.
This precision device is only serviceable if properly packed into the complete original
packaging. If necessary, ask for a replacement package prior to return.
Attention
Mobile telephones, cellular phones or other radio transmitters are not to be used within
the range of three meters of this unit since the electromagnetic field intensity may then
exceed the maximum allowed disturbance values according to IEC 61326-1.
This product has been tested and found to comply with the limits according to
IEC 61326-1 for using connection cables shorter than 3 meters (9.8 feet).