Fused Fiber Collimators

Specialists in Laser Fusion ™

LightPath Fusion™ Collimators and fiber optic assemblies utilize proprietary fiber fusion technology that allows collimators to be used at higher powers for pairing, targeting, or pigtailing applications. The lens is laser fused directly to the optical fiber, eliminating any interface causing unwanted signal distortion, photo-degradation, and space shifting issues with temperature and service life. Recognized by commercial and scientific industry leaders for offering unmatched stability against other technologies in various environmental conditions, as well as perfectly suited for extremely small packages.


Satellite Telecom

Cyber Security

Optical Biopsy

Confocal Microscopy

LightPath Fusion™ Advantage

With LightPath Laser Fusion and sophisticated assembly processes, the fiber optic assembly puts an end to any glass-to-air interface and simplifies the component layout. This eliminates surface effects and damages caused by 405nm laser irradiation that is generally experienced by unprotected fibers operating just a few milliwatts of continuous power transmission. In addition, the design stabilizes movement toward the target and delivers high laser-quality, essential for smooth signal transmission. Therefore, the time and speed of the photons are very well reserved, and it is possible to check the security of the transmitted key.

LightPath Fusion™ Collimators Datasheet

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Wavelengths400 to 1550
Fiber Types*Single Mode │ Multimode │Polarization Maintain │ LMA
FiberAcrylate coating │ Polyimide coating
Cable Diameters* 250um; 900um; 3mm
Cable TypesBuffer Coating │ Hytrel │ PTFE │ PVC+ Kevlar │ Armour
ConnectorFC/APC; FC/PC; SC/PC; Pigtail
Beam Diameters0.2 to 12.5mm (Single-Mode)
Polarization Ration>100:1 (Pigtails)
Connector Key AlignmentSlow and Fast Axis
Coupling Efficiency >70%
Pointing Accuracy<1.0° Standard │<0.5° Premium (Based on Design)
Power Handling>10W Small Beams & Large Beams│ 100W Premium Designs
Return Loss≤60dB (Typical)
Anti-Reflective Coatings*400 to 1550; Reflective ≤ 0.5% (See standard options)
Storage Temperature-40 to +85°C

*custom available upon request

"Blue to Red Photons" - Quantum Key Distribution (QKD)

Typical QKD optical system layout

Most QKD schemes require that the sender and receiver of a secret message exchange photons directly to trust the source of their keys and to avoid any hacking attempts. The gap between the fiber, length, position of components, and wavelength selection are some extremely critical factors because photons are identified by the gap between their arrival times at the detector.

Industry Challenges

Most commercial low-cost collimator technologies rely on integrated packages that consist of multi-components with several interfaces or airgaps, angled surfaces, and numerous attached structures that will degrade the beam quality and pointing, especially at the 405nm operating wavelength. In addition to these factors, we must not forget the increase in the relative noise of the overall system.


Novel Fiber Fused Lens for Advanced Optical Communication Systems