Fiber Optic Collimators

WPI’s Fiber Optic Collimator can be used for both collimating a light beam emitted by an optical fiber or coupling light from a collimated light beam into an optical fiber.

• Collimate an emitted light beam or couple light into an optical fiber
• Maximum coupling efficiency with fused silica fibers
• Easily adjust the distance between the lens and the optical fiber for focusing
• Not suitable for single mode laser applications
• UV/VIS/NIR light collimation

The numerical aperture of the collimator is optimized for maximum coupling efficiency into typical fused silica fibers. The collimator can, for example, be used to guide a parallel light beam through a sample cuvette or an optical filter with virtually no optical losses. In this application, one collimator collimates the light into a parallel beam 5 mm in diameter, enabling it to pass a long distance without losing the energy.

After the light passes the sample media, a second collimator can be used to collect the beam into the receiving fiber. A unique design feature of this collimator is that the distance between the lens and the optical fiber can be easily adjusted. This permits it to be used as a focusing device or for fine-tuning the color balance when coupling light from a light source into multimode fibers.

Lens focal distance: 10 mm
Lens material: Ultraviolet grade synthetic fused silica (KU-1)
Wavelength range: 170 nm to 2 µm
Mounting threads: ³/₈ to 24 UNF
Divergence: <0.1 rad for 1 mm core fiber
Fiber connector interface: SMA or ST