Using the OSICS TLS-50 Module
OSICS User Manual
217
Figure 164: TLS-50 Unit Setup – SBS Waveform sub-menu
3.
Turn the rotary knob to put the cursor before the wanted shape and press it to
validate your selection.
The SBS Suppression is set to the selected waveform and the
Unit Setup
menu is
automatically displayed.
14.5.4 Selecting the Frequency Deviation
Subject
Frequency modulation requires the application of a dither signal to modulate the
frequency of the laser; to broaden the effective linewidth of the laser and reduce the
effects of Stimulated Brillouin Scattering in the optical fiber.
The OIF recommended values for SBS rate (for amplitude and frequency modulation) are
Setting the SBS Suppression Mode, p. 214
.
Procedure
1.
Access the TLS-50
Unit Setup
menu (see section
Accessing an OSICS Module Setup
).
2.
Expand the
SBS Suppression
menu and enter the
SBS FM
sub-menu.
The sub-menu appears and displays the current optical frequency deviation.
Figure 165: TLS-50 Unit Setup – SBS FM sub-menu
3.
Modify the value as follows:
a. Turn the rotary knob to put the cursor under the digit you want to modify and
press the knob to highlight it.
b. Turn the knob clockwise to increase the value or anticlockwise to decrease it and
press the knob to validate the selected digit.
Main
EXIT
1
2
3
4
5
6
7
8
TLS Unit Setup - SBS Waveform
ESCAPE
▲
Sinusoidal
Triangular
SBS waveform :
Select a new value.
Main
EXIT
1
2
3
4
5
6
7
8
TLS Unit Setup - SBS FM
ESCAPE
▲
1.0 GHz
ENTER
Frequency Deviation :
Select a new value.
