NKT Photonics Koheras ADJUSTIK HP, Product Manual

Page: 38 / 115

Fast wavelength modulation
38
Table 6 Wavelength modulation settings
Wav/-
signal
The Wavelength +/- pins (see
Table 18
) are a differential input/output used for
wavelength modulation of the laser. You can configure the wavelength
modulation option so that the interface is used either as input or output. It is
preferential to use a differential signal for the modulating signal applied. When
using a differential signal, the combined voltage of the Wavelength + and
Wavelength - pins modifies the wavelength with the following results:
•
a negative voltage results in a lower output wavelength.
•
whereas a positive voltage results in a higher output wavelength.
Setting Function For CONTROL see For SDK see
External wavelength
modulation
Sets wavelength
modulation to external
signal mode.
page 74 page 84
Internal function
generator
Sets wavelength
modulation to internal
function generator mode.
page 75 page 84
Modulation
frequency
Sets the frequency of the
internal function
generator. The settable
range is from 0.008 Hz to
100 kHz.
page 76 page 85
Modulation
amplitude
Sets the modulation
maximum amplitude to
between 0 & 1000% when
using the internal function
generator mode.
page 77 page 86
Waveform When set to internal
function generator mode,
waveform sets the signal
type to either sinusoidal or
sawtooth.
page 75 page 86
Signal output Sets the wav/-
pins to output the internal
function generator signal.
page 76 page 87
Wavelength
modulation
Toggles all wavelength
modulation functionality
and settings on or off.
page 77 page 88
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