Fiber Optic Bundles and Their Advantages: Expertly Crafted for Our Customers’ Needs

Proper sampling requires more than just a sample fiber optic patch cord for many spectroscopic applications. The use of fiber optic bundles is required in cases that require to measure various samples simultaneously or those that require the improved signal to noise ratio (as in the case of weak signals). Fiber bundles became their own object of study in the period 1935-1940. The first general definition appeared in the works of Hassler Whitney.

A fiber optic bundle is defined as any fiber optic assembly that contains more than one fiber optic in a single cable. The most common example of the fiber optic bundle is known as a bifurcated fiber assembly: the goal of using the bifurcated fiber assembly is either to split a signal or to combine signals. Some of the most common applications for bifurcated fiber assemblies are those that require to direct light from a sample into two different spectrometers. This is typically used to extend the spectral coverage of the measurement, either to maintain higher resolution or to cover an extended range. In addition to this, a bifurcated fiber can also be used to couple the signal from multiple samples into the same spectrometer. Only the sample can emit light at a time in this case. Optical fiber bundles can be coherent or incoherent. The fibers are arranged so that images, as well as illumination, can be transmitted in the coherent bundles. In incoherent bundles, the fibers are not arranged in any particular way and can transmit the only illumination.

It is principal to remember two important details. First, in order to get any benefit from the fiber stacking, a cylindrical lens must be used to prevent the vast majority of the light to be imaged above and below the detector. Second, it is important to properly align the fiber stack to the entrance slit. By combining various combinations of single, round, and stacked configurations with regular, bifurcated, and quadfurcated fiber assemblies, there are countless options available to suit many applications.

Optromix offers multiple types of FlexiRay® fiber bundles and fiber converters for a broad spectral range from 0.2 to 18 µm. The fiber bundles are designed to match customer applications with different fiber types, diameters, and polymer or metal jackets. Our aim is to deliver the best quality optical fiber systems, high power fiber cables and spectroscopy fiber probes & fiber bundles to our clients, and our custom solutions meet the needs of a wide range of applications, such as reaction monitoring, biomedicine & biotechnology, IR-Fiber pyrometry, laser technology.

If you would like to buy high power fiber cables and spectroscopy fiber probes and fiber bundles, please contact us at

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