Fiber End-Cap

Neptec’s High Power Fiber End-Cap is designed for output termination of fiber lasers and fiber amplifiers to reduce power density at the fiber facet. Neptec’s unique design features a cladding light stripper is built inside in order to remove the reflection power in the fiber inner cladding. Without a high-power fiber end-cap, high optical power can easily damage the optical fiber.

As with all of Neptec’s products, Neptec’s Fiber End-Cap can be custom designed and manufactured for any specific application. If the standard Fiber End-Cap below does not fit your application, we would be glad to review your specifications and quote a custom one for you.

Product Information

Key Features

• High Signal Transfer Efficiency
• Built-in Cladding Light Stripper
• Low Beam Distortion
• Customized Configurations Available


• High Power Fiber Laser
• Collimators
• Sealing PCF



Parameter Unit Typical Notes
Operating Signal Wavelength nm 1030 to 1080
Power Handling W ≤3000 Core Power
End-Cap Length mm 20
End-Cap Diameter mm 8.2 0dBm @ 1550nm
Facet Angle 0 Selectable
Fiber Length m 2 Different Lengths Available
Loose Tube m 0.5 to 0.6

Electrical and Environmental Characteristics

Parameter Unit Typical Notes
Operating Temperature Range °C (-20) to 70
Operating Humidity Range % 5 to 95
Storage Temperature Range °C (-40) to 85
Dimensions mm Φ14/8.2x70