Efsen is distributor for Excelitas and Qioptiq. We offer a wide variety of single mode fiber delivery systems delivering laser light with absolute accuracy – and our fibers are ideal for the most challenging precision measurement applications.

Beam quality

Singlemode fibers enables you to decouple laser beam astigmatism and dynamic beam pointing instability from the measurement application. Designed around pre-focused and integrated optical assemblies, Qioptiq fiber systems are automatically mode matched to your laser parameters to maximise transmission efficiencies.

Vacuum solutions

We distribute Qioptic single mode fiber beam delivery systems for use in an ultra-high vacuum environment, in fields such as metrology and imaging. To ensure that your solution is totally reliable in the harshest environments, we carry out extensive tests.


Precision fiber interconnects

Visible singlemode fibers to fiber interconnects can often be problematic due to the inappropriate use of standard telecom connectors. The smaller fiber core sizes require more highly tolerance connector features and stricter manufacturing process controls to ensure the highest performance and reliability.

Beam conditioning

Singlemode fiber provides the ideal spatial filter to decouple spatial mode noise from the application and produce a true ‘Gaussian’ beam profile.


For more information on a specific fibers, select one below to download datasheet:


kineFLEX - Fiber Delivery System

The world’s leading single-mode and polarization maintaining fiber delivery system, with integrated optics and patented kineMATIX fiber coupler.


kineFLEX-DUO - Fiber Beam Combiners

Single-mode fused fiber splitter using kineFLEX technology.


kineFLEX-UV/HPV - Fiber Delivery System

Single-mode and polarization maintaining fiber delivery system for UV, and VIS options up to 500mW, with integrated optics and patented kineMATIX fiber coupler. Custom options for up to a few Watts.


LaserPLATE - Laser Baseplates

Pre-aligned mounting plate with kineFLEX fiber, factory set for easy alignment to your own small laser.


iFLEX-Adder – Optomechanics

Factory set beam combination system for up to 5 different lasers, provides single-mode, linearly polarized, co-linear output beam from kineFLEX fiber system.


kineMATIX - Optomechanics

World’s most stable opto-mechanical fiber coupler for aligning single-mode polarization maintaining fiber to a laser. Patented by Qioptiq.