These fiber bundles contain 7 fibers arranged in a line configuration (linear) at one end and a circular configuration (round) at the other end. Round-to-linear fiber bundle cables are commonly used to increase the coupling efficiency into spectrometers and other optical devices that have an entrance slit. The linear end matches the shape of the entrance slit better than a single fiber or round bundle configuration and therefore increases the amount of light entering the device. The linear end can also be used as a line source of light.
These round-to-linear fiber bundles use SMA905 connectors for compatibility with most spectrometers. They are built using our Ø105 µm or Ø200 µm core multimode fiber with either a high or a low hydroxyl ion (OH) content for use in the 250 - 1200 nm or 400 - 2400 nm range, respectively. For increased durability, these cables incorporate stainless steel protective tubing (FT05SS).
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Features
- One Linear and One Round End
- Low- or High-OH, Ø105 µm or Ø200 µm Core Multimode Fiber
- 2 m Long Cables with SMA905 Connectors
- No Dark (Broken) Fibers
- Linear End Matches the Entrance Slit of a Spectrometer for Higher Signal Levels
- Linear End can Generate a Line Illumination Pattern
Linear Bundle End Round Bundle End
End Face of a BFL105HS02 Fiber Bundle
Behind the 20 µm x 2 mm Entrance Slit of a 350-700nm Compact Spectrometer
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Specification
Item # BFL105HS02 BFL105LS02 BFL200HS02 BFL200LS02 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 Diameter355 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 Center Root-Mean-Square-Deviation 1.67 µm 1.09 µm Center-to-Center Distance 125.38 µm ± 0.14 µm 220.00 µm ± 0.06 µm
The deviation from center is noted by Δx and is used to calculate the Root-Mean-Square-Deviation of any one individual fiber from the center line. The center-to-center distance is given by y.
- The NA of the bundle is the same as that of the individual fibers.
- The Root-Mean-Square-Deviation represents the sample standard deviation of the fiber's center compared to the center line of the bundle. This data is from a small sample group; slight variations will occur from fiber to fiber.
- The Center-to-Center Distances represents the distance between one fiber and its nearest neighbor. This data is from a small sample group; slight variations will occur from fiber to fiber.
- 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
An Engraved Mark on the Connector's Strain Relief Sleeve Indicates the Axis of the Linear Fiber Array
Each patch cable includes two rubber and two metal protective caps that shield the connector ends from dust and other hazards. Additional CAPM Rubber Fiber Caps and CAPSM Metal-Threaded Fiber Caps for SMA-terminated ends are also offered separately.
※ Please note that the fibers are not mapped between the two connector ends.