NKT Photonics Koheras ADJUSTIK, Product Manual

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1 Laser Description
The Koheras ADJUSTIK is a single frequency distributed feedback (DFB) fiber laser
with passive vibration reduction. The laser system is housed within a rack mount
control chassis which includes a front panel operational interface. The laser’s optical
output is defined by an ultra-narrow line width in the Hertz range and exceptionally
low frequency and intensity noise. These characteristics make the laser suitable for
laser interferometry, coherent communication, microwave generation, spectroscopic,
and scientific applications.
Figure 1 ADJUSTIK front panel
A total of four variants of the laser are available with additional options that can
be specified. The variants are all designed with distributed feedback fiber laser
technology and center wavelengths can be specified from either 1535 to 1580
nanometers or 1030 to 1120 nanometers. All laser variants support a wide tuning
range of approximately 1 nm from the specified center wavelength.
Features and
Options
The laser series includes the following features and options:
•
Thermal Tuning – can vary the wavelength through coarse thermal control of
the laser substrate.
•
Piezo Tuning – provides fast wavelength modulation with finer control
•
Standard or Polarization Maintaining (PM) fiber – PM fiber is available if the
application requires that the polarization is preserved.
•
Wavelength modulation – the wavelength can be modulated using either an
external or internal signal.
•
Power or Current modes – the lasers can operate in either constant power or
constant current mode.
•
Adjustable output power (X15 variant only) – using an optional Variable
Optical Attenuator
•
Emission features – multiple features that control emission availability from
the laser.