Electromagnetic Interference; Powering On; Input Optical Power - THORLABS PDA015A2 Quick Start Manual

Electromagnetic Interference: Mobile telephones, cellular phones or other radio
transmitters are not to be used within the range of 3 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).
Powering On: Note that immediately after the power is switched on, the output
of the PDA015A2 will momentarily (for 200 ms) go to its maximum output
voltage (5 V for 50 Ω load or 10 V for high impedance load). For sensitive
equipment that cannot tolerate this brief spike, turn on the PDA015A2 before
connecting to its output.
Input Optical Power: Photodiodes are sensitive devices and can be easily
damaged by overpowering them; care must be taken to ensure functionality. Be
careful not to illuminate to photodiode beyond its 150 µm diameter as this can
degrade performance. Optical power can be converted to voltage using the
formula noted below. Please use the formula to ensure the detector is not
saturated.
Voltage (V) =
Optical Power (W) x Responsivity (A/W) x 50,000 (V/A) x (R / (R + 50 Ω))
LOAD LOAD
The maximum output of the PDA015A2 is 5 V for 50 Ω loads and 10 V for high
impedance loads. Be sure not to exceed these output levels to avoid signal
distortion. If necessary, use neutral density filters to reduce the input light level.
Caution Using Fiber Adapters: The PDA015A2 was designed to allow maximum
accessibility to the photodetector by having the front surface of the diode close
to the outside of the PDA015A2's housing. When using fiber adapters, make sure
that the fiber ferrule does not crash into the detector. Failure to do so may cause
damage to the diode and/or the fiber.
Manufactured by: Thorlabs Inc., 110 Parkland Plaza, Ann Arbor, MI 48103 USA
EU Importer: Thorlabs GmbH, Hans-Boeckler-Str.6, Dachau, D-85521 Germany
See www.thorlabs.com/manuals to access the full product manual.