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Controlling Beam Stability and Uniformity

Beam Delivery Fibers for Generating Flat-Top Beam OutputNuBEAM Flat-Top fibers are specially designed to scramble the mode content propagating in its core, tailoring the mode power distribution to achieve flat-top beams. In addition, these fibers have been carefully engineered to allow precise control of the output beam parameter product (BPP) or beam divergence. Nufern’s flat-top beam delivery fibers offer unique performance attributes to efficiently convert Single-Mode (SM) and Multi-Mode (MM) beams into flat-top beam profiles. NuBEAM Flat-Top fibers are perfectly suited to be easily and efficiently integrated with existing fiber and free-space based optical systems and are designed to handle multi-kilowatt power levels. These unique fibers offer the highest level of performances for laser, amplifier and light delivery systems requiring either flat-top and homogeneous beams, mode mixing or BPP enhancement.

7 Airport Park Road, East Granby, CT 06026 Toll Free: 866.466.0214 | Tel: 860.408.5000 | Fax: 860.844.0210 | www.nufern.comCapabilities and typical design parameters are described above. Various standard and OEM designs are available. NU238-1/16

Optical Attributes• Beam Transformation — From Gaussian to Flat-Top beam profile

• Mode conversion — Achieve targeted BPP

• Multimode beam homogenization — Reduction of hot spots

• Efficient brightness conservation of multimode beams

• Suitable for Multi-kW beam delivery

Features & Benefits• All-in-fiber solution — Simple system integration with

conventional splicing/connector techniques

• Beam delivery cable format — Compatible with industry standards

• Pure silica core — Low attenuation over a wide spectral range from UV-VIS to NIR

• All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability

• Scalable design — Can be optimized to achieve specific customer requests

Mechanical Attributes• Robust design — Compatible with majority of fiber

interconnect systems

• Clean room processing — Provides high-strength and long-life

• Core diameters ranging from 50 μm to 600 μm — Covers low to high power applications

Controlling Beam Stability and Uniformity

®

Applications• Beam delivery for high power fiber, solid-state or direct diode

lasers

• Material processing applications requiring Flat-Top beams

• Uniform illumination for imaging and spectroscopy

• All-Fiber solution for mechanical mode scramblers used for medical applications

• Homogeneous tissue exposure for laser-assisted surgery

NuBEAMFlat-Top

Technology

OUTPUT BEAMINPUT BEAM

SM MM

Standard BD Cables

MM MM

BPP

~ 2

.5

3 < BPP < 4

Single ModeSingle Mode

Few ModedFew Moded

100’s of Modes100’s of Modes

100 μm Core

Flat-Top

BPP

Incr

ease

BPP

> 5

Standard BD Cables

1.0

0.8

0.6

0.4

0.2

0.0-80 -40 0 40 80

BPP Conserved