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Cage-Compatible Fiber Launch Solutions
Two mirrors, each mounted in a kinematic mount, are used to align an incoming laser beam with the optical axis of the KT110 cage-compatible fiber launch solution for coupling into a multimode fiber. Recommended setup and alignment details are available in the manual.
Thorlabs' KT110(/M) Cage-Compatible Fiber Launch Solution is designed for coupling free-space laser beams into either FC- or SMA- terminated fiber optic cables. This system, which can be used with either single or multimode fiber, is equipped with high-precision differential adjusters capable of submicron translation.
This fiber-coupling solution, designed to be compatible with our 30 mm cage system, uses two translation mounts to provide XYZ motion control. The ST1XY-D XY translator with differential drives offers ±3.0 mm of travel with both coarse and fine adjustment knobs. This allows for both aligning the focusing optic onto the optical axis of the launch system and optimizing transmission through the fiber. To translate the fiber end through the focus of the laser beam, the SM1Z Z translation mount offers 2.0 mm of fine adjustment. Please see the provided manual for more details about the alignment process.
Either an RMS-threaded microscope objective or an M9 x 0.5 threaded aspheric lens mounted in the provided RMS thread adapter can be used as the focusing optic in this fiber launch solution. An external SM1 thread to internal RMS thread adapter is included for compatibility with the internal SM1 threads of the XY translator. To accommodate microscope objectives that are not RMS-threaded, additional external SM1 thread to standard internal thread adapters are available on our thread adapters guide.
This fiber launch solution includes our PB1 universal post base, which features four 1/4" (M6) counterbored holes for mounting the system on an imperial or metric optical table or optical breadboard with mounting holes on 1" or 25 mm centers. CL5 L-shaped table clamps can also be used to secure the base in place. When completely assembled and mounted, the optical axis sits 3.7" above the optical table.
Please note that this fiber launch solution only includes optomechanical components; the individual optomechanical parts used in the KT110 assembly are imperial or universal, while the parts used in the KT110/M assembly are metric or universal. A complete list of components can be found on the Components tab.
Recommended Aspheric Lenses
Fiber Alignment and Launch Solutions
Thorlabs' Cage-Compatible Fiber Launch Solution is available in imperial and metric versions. The individual optomechanical parts used in the KT110 assembly are imperial or universal, while the parts used in the KT110/M assembly are metric or universal.
Cage System Overview
The Cage Assembly System provides a convenient way to construct large optomechanical systems with an established line of precision-machined building blocks designed for high flexibility and accurate alignment.
16 mm, 30 mm, and 60 mm Cage System Standards
Thorlabs offers three standards defined by the center-to-center spacing of the cage assembly rods (see image below). The 16 mm cage, 30 mm cage, and 60 mm cage standards are designed to accomodate Ø1/2", Ø1", and Ø2" optics, respectively. Specialized cage plates that allow smaller optics to be directly inserted into our larger cage systems are also available.
The flexibility of our Cage Assembly System stems from well-defined mounting and thread standards designed to directly interface with a wide range of specialized products. The three most prevalent thread standards are our SM05 Series (0.535"-40 thread), SM1 Series (1.035"-40 thread), and SM2 Series (2.035"-40 thread), all of which were defined to house the industry's most common optic sizes. Essential building blocks, such as our popular lens tubes, directly interface to these standards.
An example of the standard cage plate measurements determining cage system compatibility.