Hinds Instruments PEM200, Руководство пользователя

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PEM200 User Manual 19
4
Initial Set-Up
Before the initial set-up, the PEM optical head should be unpackaged as described on
page 6-
Unpacking the PEM200 .
Connecting the PEM Optical Head and Controller
Use the two (2) supplied female to female SMA cables to run a connection between the
optical heads’ SMA connectors and the high voltage (HV) output of the PEM-200
controller. Order does not matter on which controller output goes to which optical head
input.
Optical Bench Set-up
The optical bench and electronic configuration depend on the particular application
required for the modulator. More detailed set-up information can be found at our
website’s
applications menu.
The most common optical and electronic setup for checkout and calibration of the
modulator is shown in figure 4.1. This shows a monochromatic light source (such as a
laser) or multi wavelength source with a wavelength selection device (e.g.
monochromator).
Figure 4.1 Block Diagram for Oscilloscope Calibration Method
The light source, if unpolarized, is followed by a polarizer at 45 degrees with respect to
the horizontal, the modulator with its axis horizontal (0 degrees), a second polarizer
(often called the analyzer) at -45 degrees, and a detector.
Monochromatic
Light Source
+45°
Polarizer
Modulator
0°
Polarizer
Controller
Oscilloscope
Reference
-45°
Detector