What is a Power Sensor Module
Getting Started with Power Sensor Modules
Agilent 81630B/4B/6B/7B Power Sensor Modules and Agilent 81635A Dual Power Sensor Module, Second Edition
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What is a Power Sensor Module
A Power Sensor Module measures the power emitted from a connected
single-mode or multi-mode fiber (with Numerical Aperture
≤
0.24/0.3
and core diameter up to 100
µ
m according to the model). The
wavelength and power range depend on the sensor element.
A Description of the Front Panel
Figure 1
Front Panel of the Agilent Power Sensor Modules
Analog Output
The analog output is the BNC connector on the front of the sensor
module. It outputs a voltage directly proportional to the strength of the
optical signal at the optical input in the current range. The analog
signal is always in the range between 0 and 2V, 2V corresponding to a
full power input signal in the current range, 0V corresponding to no
input signal.
During autoranging, the level to which 2V corresponds changes. You
should disable autoranging when using the analog output.
Disabling Autoranging
Select the best range for the application using the mainframes user
interface. Select <Menu>, <Range Mode>, <Manual> and then choose
from the list of ranges.
Applications
Possible applications for the analog output are:
• to close the feedback loop controlling the current supplied to a laser
• to aid positioning the system for fiber alignment tasks
81634B
Power Sensor
Output
Analog
+10dBm
-110dBm
Input
InGaAs
81635A
Power Sensor
Input1
InGaAs
+10dBm
-80dBm
Input2
InGaAs
81636B
Power Sensor
Output
Analog
+10dBm
-80dBm
Input
InGaAs
81637B
Power Sensor
Output
Analog
+10dBm
-80dBm
Input
InGaAs