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SuperK SELECT
SuperK SELECT
A SuperK SELECT accessory can be fitted to extract multiple specific light
wavelengths from the broadband spectrum output of the SuperK COMPACT
laser. The SELECT accessory uses Acousto-optic Tunable Filter (AOTF)
technology which uses a tellurium dioxide crystal that diffracts the desired beam
wavelength. The specific wavelength diffracted by the crystal is tuned by
applying an RF signal to it. A single SELECT crystal filter can output up to eight
tunable wavelengths that can be configured from the SuperK CONTROL
application. The SELECT accessory can be fitted with up to two AOTF crystal
filters resulting in a maximum of 16 specific wavelengths that can be tuned and
extracted from the laser’s broadband output. A diagram of the main accessory
connections is shown in Figure 66.
Figure 66 SuperK SELECT
Output delivery
The beam delivery from the SELECT output can be either a free space collimated
beam or fiber coupled using Fiber Deliver (FD) with a SuperK CONNECT (fiber
coupling connector). The AOTF crystal output naturally includes power from
numerous sidebands, see Figure 67 on page 102. Free space delivery
implements a small aperture to suppress the bulk of the side lobe power beyond
the first order. However, when using a fiber deliver system such as SuperK
Connect, a small aperture is not required; the delivery system aperture will
provide the suppression.
Output beam specifications
AOTF types must be specified when ordering a SuperK COMPACT. The type of
AOTF determines the possible wavelength range and bandwidth that can be
diffracted from the crystal. Table 21 lists the available AOTFs that can be used
with the SuperK SELECT.
Output apertures with
Optical Input
Connect accessory
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