Fiberguide Industries, the leader in complex fiber optic solutions, is pleased to announce the launch of a new product designed to improve the optical performance of various laser manufacturing processes and medical applications – the square core fiber. This square core shape expands on the variety of standard and custom optical fibers offered from Fiberguide.

Fiber optic cables are traditionally constructed with a round core, as they are the easiest geometry to manufacture. Even though this has been the standard geometry in optical fibers, newer fiber cables with a square core design can offer improved laser-treatment-area efficiency and reduce the need for traditional and more expensive free-space beam shaping.

Why the Square Core Design?

Gone are the days of needing to laser process or treat the same area multiple times using a step and repeat overlapping pattern because your round core fiber does not produce well-defined edges. With its linear and uniform optimal geometry, the square core fiber can process material in a timely and more cost-effective manner than is possible with a round core fiber.

The square fiber produces well-defined edges, a homogenous beam output, and enables high coupling efficiency between the diode and the fiber – unlike round core fibers. All aspects of the square core design enable you as the user to employ this multi-mode fiber as an effective tool for increasing the efficiency of your optical fiber applications.


Where You Can Benefit

Square core fiber optics are an excellent choice for a number of industries, including industrial manufacturing and medical applications. In laser-based welding and cutting operations—engineers will see more efficient production results due to the uniform output and uniform profile edges. In addition, the light output and transmission are more consistent for the desired processing areas. Engineers involved in laser welding will be familiar with laser diodes beam patterns that are square or elliptical in nature, so naturally a square core fiber is a logical and more efficient fit. The square core fiber captures the optical beam equally at all points; and this leads to a greater coupling efficiency. With the elimination of the overlapping step-and-repeat surface treatment, processes using the square core fiber see an improved return on investment (ROI) over the alternative of modifying existing circular core fiber processes.

There are many other manufacturing areas that benefit from square core fibers. In the medical industry, square core fibers can also offer high efficiency fiber optics. From invasive and non-invasive laser treatments, surgery, medical imaging, to intravenous sensing, there is the need for greater, more uniformly distributed laser power; square core fibers are an effective way to achieve this.

Application such as surgical microscopy, X-ray imaging, light therapy, ophthalmic lasers, and illumination instruments. can be made more surface efficient by choosing a square core fiber. Fiberguide fibers are certified bio-compatible and can be used in a variety of medical treatments.

For more information about how square core fibers can benefit you and be a worthy long-term investment, contact us online to learn more about this next-generation innovation.



For additional information on Fiberguide products and services, contact Fiberguide toll free at 877-490-7803, email or visit In addition, the company is exhibiting at BIOS/ Photonics West at the Moscone Center (San Francisco, Calif.) from February 1-6. Attendees can visit the company at BIOS booth 8861 and Photonics West booth 1135.


Company Profile:
Fiberguide Industries, Inc., a Halma company, is a leading supplier of specialty optical fiber and optical fiber assemblies with offices in 11 countries and sales in over 30 countries. The company’s gold and aluminum coated fibers and precision array capabilities make it the manufacturer of choice for high temperature environments, and demanding OEM assemblies and array specifications. Fiberguide is ISO 13485:2016 and 9001:2015 certified.

Author: GlobalizeMe Dev