Linear-to-Linear Fiber Optic Bundles

  These fiber bundles contain 7 fibers arranged in a line configuration (linear) at both ends. Linear-to-linear fiber bundle cables are ideal for increasing the coupling efficiency into spectrometers and other optical devices that have an entrance slit. The linear ends match the shape of the entrance slit better than a single fiber or round bundle configuration and therefore increase the amount of light entering the device. The linear ends are also better suited to the elliptical emissions of typical discharge style lamps and measurements using cuvettes, such as absorption spectroscopy.
 

• Features

• Linear-to-Linear Fiber Bundles with 7 Fibers
• Low- or High-OH, Ø105 µm or Ø200 µm Core Multimode Fiber
• 2 m Long Cables with SMA905 Connectors
• Coherently Mapped Configuration
• Linear Ends Match the Entrance Slit of a Spectrometer for Higher Signal Levels
• Linear Ends can Generate a Line Illumination Pattern

                                               
                               Linear Bundle End                    

 

           

• Specification

  Item #	BFA105HS02	BFA105LS02	BFA200HS02	BFA200LS02
  Number of Fibers	7
  Fiber Core Size	Ø105 µm		Ø200 µm
  Linear End Fiber Dimensions	0.90 mm x 0.13 mm		1.55 mm x 0.23 mm
  Round End Effective Core Diameter	355 µm		640 µm
  Fiber NA	0.22a
  Hydroxyl Ion Content	High OH	Low OH	High OH	Low OH
  Wavelength Range	250 - 1200 nm	400 - 2400 nm	250 - 1200 nm	400 - 2400 nm
  Fiber Attenuation Plot
  Length	2 +0.075/-0 m
  Connectors	SMA905

• Notice

When plugging the linear end of the bundle cable into the spectrometer or another device, the fiber array must be aligned with the entrance slit. For ease of alignment, the fiber array's axis is indicated by a line on the connector sleeve, as shown in the image below. Precise alignment of the bundle and slit is not critical, but misalignment of more than ±5° can cause a reduction in signal strength. In order to maximize signal intensity, we recommend rotating the bundle while monitoring light levels in the spectrometer; once optimized, tighten down the threaded portion of the SMA connector to lock the bundle in place. When using these bundles with our CCD Spectrometers, the fiber array should be oriented vertically.


An Engraved Mark on the Connector's Strain Relief Sleeve Indicates the Axis of the Linear Fiber Array

• Application Ideas

• Coherence of Linear-to-Linear Bundles

The fibers within these bundles are coherent. As shown in the illustration to the below, the fibers remain in the same order with respect to each other from one end of the bundle to the other, though their orientation may be reversed by rotating one end by 180º.

• Benefits of Linear-to-Linear Bundles

The shape of the linear ends of these bundles matches the entrance slit of a spectrometer better than the end of a single fiber or a round bundle. Similar to the narrow entrance slit of a spectrometer, the shape of cuvettes used for absorption spectrometry is better suited to the linear ends of these bundles than to the ends of single fibers or round bundles, further increasing the efficiency of absorption spectrometry measurements. In addition to the cuvette and the entrance slits of the spectrometer, typical discharge style lamps have highly elliptical emission volumes that also couple more efficiently to linear bundle ends.

• Absorption Spectroscopy

Spectrometers measure the properties of incident light over a specific range of the electromagnetic spectrum. When light passes through a sample containing cells or particles before reaching the spectrometer, the amount of light reaching the spectrometer will be decreased due to the absorption or scattering of light by the contents of the sample. The measurement of the percentage of light that is transmitted through the sample is called absorption spectroscopy and can be used to measure the progress of an enzymatic reaction, the concentration of a sample, or the absorption spectrum of a sample.