Fiber End Cap

Optical Fiber End Cap

Fiber end caps are core optical components in QBH fiber laser output heads, which ensure stable fiber laser output and effectively eliminate back reflections during industrial processing.

GEZHI Photonics can customize and manufacture fused silica end caps in various specifications using Corning, Schott, fused silica materials or other customer-specified materials according to product application requirements. We can also deposit anti-reflection coatings on the output surface, with coating processes including IAD (Ion Assisted Deposition) and IBS (Ion Beam Sputtering), providing ideal, safe and stable solutions for customer fiber laser applications ranging from low power to high power.

Fiber End Cap Patchcord Parameter

All listed parameters are typical values specified at room temperature. Specifications are subject to change without notice.

Ordering Information

Coupling Light into and Out of Standard Fiber vs. End-Capped Fiber

 Fiber end caps from GEZHI Photonics deliver optimum performance, created by fusion splicing or laser fusing short lengths of material to the fiber end face.

Fiber End Caps involves splicing or fusing coreless fiber to single-mode (SM), multimode (MM), or gain-transmitting fiber. This design lowers power density (J/cm²) and effectively raises the laser damage threshold of optical components.

The end capping process faces three key technical challenges: cleaving large-diameter fibers of 200–600µm, achieving reliable fusion splicing between fiber and end cap, and performing precise end cap cleavage aligned with the splice point.

Controlled cleave angles are essential to suppress back-reflection; for PM fibers, the stress rods must be accurately oriented relative to the cleave angle.

Laser processing enables precision cleaving of large-core fibers before splicing, eliminating hackles and chipping that typically occur with mechanical scribing methods.

After fusion splicing, Fiber end caps can be laser-cleaved to meet precise specifications on final protrusion length, end angle and angular orientation — including accurate alignment of stress rods for PM fibers.

Laser cleaving is also well-suited for high-power laser applications, avoiding thermal buildup caused by strong light absorption from residual polishing compounds used in conventional mechanical polishing.