35
2 Modulation
This section presents further information on how to implement:
• Wavelength modulation (fast) – “Fast wavelength modulation” on page 35
• External cavity stabilization – “External cavity stabilization (BASIK X15)” on
page 42
Note: Wavelength modulation must be specified when ordering the laser.
Note: E15 modules are capable to decrease output power down to 30% of the
nominal level. However, the laser’s performance will vary depending on the level
of the output power set. Therefore the E15’s performance is only guaranteed at
the nominal (maximum) output power setting.
Fast wavelength modulation
If the fast wavelength modulation option is included with the laser, the output
wavelength can be modulated using an external varying electrical signal, the
internal function generator, or both.
Configuring
external and
internal wavelength
modulation
The wavelength of the Koheras BASIK module can be modulated with either:
• an external electrical signal applied to the Wavelength+/- input,
• the internal function generator
• or both
The firmware in the module is designed so at least one of the two is enabled.
Table 6 provides a description with cross-references of the settings involved
when using fast wavelength modulation.
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