Sub-micron resolution and stability are required when coupling laser light into the core of a single-mode fiber. Our F-1015 Precision Single-Mode Fiber Couplers use a steering lens to achieve 0.1 micron resolution in a compact package.
These couplers are very easy to use. An input iris assists in centering the laser beam. The beam passes through a steering lens, which is mounted in a precision X-Y translation assembly with 100 pitch adjustment screws. An objective lens focuses the beam on the fiber core. Translating the steering lens causes a second-order translation of the focused beam across the fiber end-face, providing 0.1 micron beam positioning resolution with negligible changes of incident angle at the fiber face.
For use with free-space laser, operating in the visible wavelength range, Model F-1015 has a steering lens with a multilayer dielectric AR coating and a M-20X Microscope Objective. The effective focal length is 9 mm.
For use with laser diodes, Model F-1015LD has a steering lens that is AR coated for high transmittance at 850, 1300, and 1550 nm. It comes equipped with an F-L10B Laser Diode Objective Lens and has an effective focal length of 12 mm. (For optimal performance, a collimated beam should be incident on the ...

Sub-micron resolution and stability are required when coupling laser light into the core of a single-mode fiber. Our F-1015 Precision Single-Mode Fiber Couplers use a steering lens to achieve 0.1 micron resolution in a compact package.
These couplers are very easy to use. An input iris assists in centering the laser beam. The beam passes through a steering lens, which is mounted in a precision X-Y translation assembly with 100 pitch adjustment screws. An objective lens focuses the beam on the fiber core. Translating the steering lens causes a second-order translation of the focused beam across the fiber end-face, providing 0.1 micron beam positioning resolution with negligible changes of incident angle at the fiber face.
For use with free-space laser, operating in the visible wavelength range, Model F-1015 has a steering lens with a multilayer dielectric AR coating and a M-20X Microscope Objective. The effective focal length is 9 mm.
For use with laser diodes, Model F-1015LD has a steering lens that is AR coated for high transmittance at 850, 1300, and 1550 nm. It comes equipped with an F-L10B Laser Diode Objective Lens and has an effective focal length of 12 mm. (For optimal performance, a collimated beam should be incident on the coupler. A variety of lenses are designed for this purpose, see Fiber Coupling Optics.)
These couplers are constructed of anodized aluminum and are sold without fiber chucks. The FPH-J four-jaw fiber chuck with Teflon liner for fibers less than 250 microns in diameter, and the FPH-DJ Delrin-jawed chuck for fibers 250 microns to 1 mm in diameter are the bare fiber chucks of preference. The FPH-S and FPH-S-2.5 slotted fiber chucks can also be used.