Setting Standard Parameters
Tunable Laser Source
17
Switching between Normal and High-Resolution (HR) Modes
Switching between Normal and
High-Resolution (HR) Modes
In HR mode, the laser linewidth is reduced by a factor of 20 %. Typically, at
1550 nm, the Normal mode will produce a 1.6 GHz FWHM linewidth, while
the HR mode will produce a 1.4 GHz FWHM linewith. The tuning range
(or power at extreme wavelength) might be smaller in HR mode than in
Normal mode.
To select the operation mode:
Press the mode control button on the front panel.
Adjusting Decimals Using the Fine-Tune
Feature
You can select values for your testing needs in two different ways:
Fine-tune
and
Coarse
. If you press the
Fine-tune
button on the front panel,
Fine-tune
appears on the display and you will be able to set the decimals.
If
Fine-tune
does not appear on the display, you are in
Coarse
mode and
can only adjust the numbers before the decimal point with the
selection dial.
Note:
The
Fine-tune
feature applies to every numerical edition function with a
decimal point except in the
Adjust
submenu of the
Setup
menu.
See
Adjusting Your Unit According to Wavelength
information.