These fiber bundles have one circular and one rectangular end. Use them to carry light from a light source to a monochromator or spectrograph, or from a monochromator to a detector or sample. The rectangular end is used to replace the instrument’s input slit. The circular end has an 11 mm Oriel ferrule. We offer two sizes of rectangle; we call them Small Slit and Large Slit.
Fig. 1 Transmittance of Rectangular to Circular Fiber Bundles.
Small Slit Bundles
- 100 µm x 2.5 mm or 200 µm by 6.0 mm slit size
- Useful for spectrographs with multichannel detectors
These fiber bundles are primarily used for input to spectrographs with PDAs or CCDs. The 2.5 and 6.0 mm height matches the height of many array detectors.
The circular end is terminated with an SMA connector. The rectangular end is terminated with an 11 mm O.D. “quick connect” ferrule, which lets you snap the fiber into any Oriel Fiber Bundle Holder. Once the fiber is snapped into its holder, it is locked in place – no locking screws are needed. Quick connect ferrules simplify insertion and removal, and minimize light leakage.
Large Slit Bundles
- 0.8 x 9.7 mm slit size
- Useful for monochromators
These fiber bundles are most often used with Newport’s Oriel Monochromators. With standard circular-to-circular fiber optics, the vignetting losses at the slit are significant. These fibers minimize those losses.
The circular end has a standard Oriel 11 mm ferrule, which require set screws for locking. The rectangular end is a 0.75 x 0.25 inch (19 x 6.4 mm) connector.
Construction
The fibers in the Small Slit Bundles are protected by a polypropylene tubing and PVC with Kevlar outer jacket. The Large Slit Bundles have an interlocking stainless steel sheathing protecting the glass or fused silica fibers.
