NKT Photonics Koheras ADJUSTIK HP, Product Manual

Page: 37 / 115

37
2 Modulation
This section presents further information on how to implement:
•
Wavelength modulation (fast) –
“Fast wavelength modulation” on page 37
•
Amplitude modulation –
“Amplitude modulation” on page 44
•
External cavity stabilization –
“External cavity stabilization” on page 46
Note: Wavelength modulation must be specified when ordering the laser.
Note: An E15 ADJUSTIK variant is 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
wavelength
modulation
The wavelength of the laser can be modulated with either:
•
an external electrical signal applied to the modulation input
•
the internal function generator
•
a combination of the above
The firmware in the laser 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.