General Information; Safety - THORLABS APD410 Series Operation Manual

1 General Information

The Thorlabs APD410x series of temperature-compensated Avalanche Photodetectors com-
bine 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 10 MHz.
APD410x series Avalanche Photodetectors have an exceptionally low NEP, making them ideal
for fast low-level light detection applications, such as spectroscopy, fluorescence measure-
ments, laser radar and optical rangefinders. Due to their very high sensitivity, the APD410x
series Avalanche Photodetectors can replace Photomultiplier Tubes (PMT) in many applica-
tions. The Avalanche Photodetectors cannot be damaged by unwanted ambient light, which is
an advantage over many photomultiplier tubes.
The APD410x feature a continuously adjustable Gain that is based on the adjustment of the
APD's M (multiplication) factor. They also incorporate a special electronic circuit to compensate
for the temperature dependency of the M 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 APD410x has three tapped mounting holes.
The APD410x series is powered by the included external power supply LDS12B (±12 VDC, 250
mA) via a PICO M8 power connector. The appropriate input voltage (100 VAC, 120 VAC, 230
VAC) can be selected with a switch on the

1.1 Safety

Attention
The safety of any system incorporating the equipment is the responsibility of the assem-
bler of the system.
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.
The APD410x must not be operated in explosion endangered environments!
Do not obstruct the air ventilation slots in the housing!
Do not remove covers!
Do not open the cabinet.There are no parts serviceable by the operator inside!
This precision device is only serviceable if properly packed into the complete original
packaging including the plastic foam sleeves. If necessary, ask for replacement pack-
aging. 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.
All modules must only be operated with duly shielded connection cables.
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).
© 2020 Thorlabs
power supply .
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1 General Information
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