Narrow Bandpass Filter (BPF)


Neptec’s Narrow Bandpass Filters (BPF) are used to selectively transmit 1064nm wavelength light. Narrow Bandpass Filters (BPF) block out unwanted noise signals in EDFAs and fiber laser systems and ensure a pure signal. Without a Band Pass Filter, the laser produced will be inaccurate and produce inconsistent power delivery.

Neptec offers a wide range of customization options including power handling, fiber type, and polarization maintaining (PM). If the standard narrow bandpass filter (BPF) below does not fit your application, we would be glad to review your specifications and quote a custom BPS for you.

Product Information

Key Features

• High Channel Isolation
• High power handling
• High Stability and Reliability
• Low Insertion Loss
• High return loss
• PM and Non-PM are available
• Customized Configurations For Any Application


• Fiber Lasers and Amplifiers
• Fiber sensor



Parameter Unit Typical Notes
Operating Signal Wavelength nm 1020 to 1150
Center Wavelength nm 1064±2
Pass Bandwidth @-1.0dB nm 10 (Typical 8 to12)
Stop Band Width @-25dB nm ≤25
Insertion Loss in Pass Band dB ≤0.8
Flatness@Passband dB ≤0.5
Return Loss dB
Maximum Power Handling mW 1000
Operating Temperature °C 0 to +70
Storage Temperature °C (-40) to +85
Fiber Type - Hi 1060 Bare fiber Other types available
Connector Type - N/A
Dimensions mm Ø5.5× L34