Normally, beam alignment in a FiberBench is effected using the FiberPorts. However, Tweakers offer an alternate means of x-y and w-u control of beam alignment.
The X-Y Tweaker consists of a precision polished, AR coated plane-parallel plate mounted on a magnetic ball-and-socket, and is thus able to be rotated and tilted in nearly any orientation. The beam is consequently displaced parallel to itself as much as ±250 µm with hyperfine precision. Tilting beyond 30° can affect insertion loss because of AR coating angular dependence.
The phi-rho Tweaker consists of two precision polished, AR coated wedges in a dual rotary mount that permits independent rotation of each wedge. Thus, the combined angular displacement of the pair can be controlled with hyperfine precision anywhere within a 0.5° cone.
In addition to aligning a FiberBench or FiberTable, Tweakers are often used to steer a beam in free-space applications.
425 - 675nm
700 - 950 nm
*t: specify 1.5mm or 2.5mm thickness λ: specify wavelength, for example HW-XY-1.5-IR
950 - 1150 nm
1300 - 1550 nm
Ddiscs with 1.5mm or 2.5mm apertures are mounted into fixed FiberBench modules. The apertures are used to help with beam alignment and centration when doing fiber-fiber alignments.