Setting Up the Emission Wavelength or Frequency
32
T100S-HP User Guide
4.5.2
Setting the Sweep Speed
Subject
You can set the sweeping process to scan from a lower to an upper wavelength value, at
a user-specified speed. When the T100S-HP has reached the upper wavelength limit, it
returns to the initial wavelength value at maximum speed (i.e. 100 nm/s), and starts
again the scanning process at the defined speed.
Procedure
1.
Press
2nd
+
λ
.f
keys to display the current sweep speed setting.
2.
Enter the new sweep speed directly in nm/s unit.
The sweeping speed is user-selectable within the speed range of 1 to 100 nm/s. You
may choose any speed value within this range. However, operational speeds that the
motor can move are: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 20, 22, 25, 29,
33, 40, 50, 67, 100] (nm/s). Therefore, the speed you select is rounded-up to nearest
value of operational speed.
For example, if you select a 70 nm/s sweep speed on the T100S-HP front panel, your
setting is automatically corrected by the system to match the nearest operational
value, i.e. 67 nm/s.
3.
Press
Enter
to confirm the change.
4.6
Turning On/Off Backlash Suppression of the Micrometer
Screw
Subject
The T100S-HP firmware systematically implements an on-board procedure to eliminate
the effect of backlash on the tuning micrometer screw.
By default, backlash suppression is activated.
Procedure
•
To disable the backlash suppression mode, press the
2nd
+
1
function keys.
A dot is displayed at the right end of the wavelength.
Example:
λ
= 1555.000 nm .
•
To enable the backlash suppression mode, press the
2nd
+
1
function keys again.
4.7
Turning On/Off Coherence Control
Subject
The Coherence Control function adds noise to the laser optical frequency output
producing an apparent broadening of the linewidth. Coherence control is particularly
useful to reduce the impact of parasitic interferences in the user setup.
This function can also be accessed by using the FSC input on rear panel (see section
Using the Auxiliary Inputs and Outputs, p. 43
Procedure
•
To activate the coherence control feature, press the
2nd
+
FSC
function key.
The
FSC
key LED blinks, which means that the function is activated.
•
To deactivate the coherence control feature, press the
2nd
+
FSC
function key again.
Summary of Contents for T100S-HP Essential
Page 1: ...www EXFO com T100S HP High Power Tunable Laser User Guide T100SHP_UM_6 06v1 2...
Page 2: ......
Page 10: ...Important Safety Information for Your Product 10 T100S HP User Guide...
Page 20: ...Product Presentation 20 T100S HP User Guide...
Page 24: ...Installing and Connecting the Product 24 T100S HP User Guide...
Page 42: ...Enabling Active Wavelength Monitoring 42 T100S HP User Guide...
Page 50: ...Using the Auxiliary Inputs and Outputs 50 T100S HP User Guide...
Page 54: ...Verifying Performances 54 T100S HP User Guide...
Page 58: ...Performing Basic Maintenance Operations 58 T100S HP User Guide...
Page 64: ...List of Tables 64 T100S HP User Guide...
Page 66: ...List of Figures 66 T100S HP User Guide...
Page 70: ...Index 70 T100S HP User Guide...