NKT Photonics Koheras ADJUSTIK, Руководство по эксплуатации продукта

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Module variants
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Tuning
Tuning is accomplished by either manual thermal tuning or using an external
signal applied at the laser’s fast wavelength modulation input pins. A varying
external signal applied to the pins, modulates the output wavelength. Modulating
the output wavelength can obtain improved stabilization when compared with
the free-running wavelength specification.
Output fiber
The standard output of the laser utilizes either standard single mode fiber or
optional polarization-maintaining fiber to improve the linear characteristics.
Improved polarization linearity is usually required when the laser output is either
externally modulated or frequency converted.
Theory of operation
The ADJUSTIK is a fiber laser that uses a fiber Bragg grating cavity to produce an
output beam operating in single mode. The center wavelength of the laser is
configurable using either thermal substrate control or optional Piezo components.
Due to the special Bragg grating, the single mode operation is constantly maintained
and is stable over the entire operating frequency band of the laser.
Module variants
The Koheras ADJUSTIK is available in four variants. The variants are mainly
classified by their wavelength and output power.
Table 1
describes the primary
technical differences between the variants.
Table 1 ADJUSTIK variant specifications
Center wavelength
The center wavelength of ADJUSTIK lasers is set to 1550.12 nm (ITU DWDM C-BAND
Channel 34) or 1064.00 nm. The lasers can also be specially ordered from the factory
with other center wavelengths ranging from 1535 to 1580 nm or 1030 to 1120 nm.
Output power
Depending on the module type, the output power varies between greater than 10 mW
and up to and including 40 mW. The output power is fixed for the lasers. however, a
Variable Optical Attenuator (VOA) can be specified with the laser to adjust the output
power over a large dynamic range.
Module Type Standard λ Other λs
1
1. Fixed
Output Power Polarization
Maintaining
Fast Modula -
tion
X15 1550.12 1535 - 1580 nm
30 mW (fixed) 2
2. Actual value depends on the factory calibration
Yes Yes
E15 1550.12 1535 - 1580 nm
40 mW (max.) 3
3. Min. output ~30% of the maximum
Optional Yes
C15 1550.12 1535 - 1580 nm >10 mW (fixed)
2
Yes Yes
Y10 1064.00 1030 - 1120 nm
>10 mW (fixed)
2
Yes Yes
2