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  • OTF-980

Ultra-Steep Tunable Filter

Our flagship programmable bandwidth and wavelength tunable filter, loaded with options

• Center wavelength & bandwidth can be tuned independently
• Ultra-steep filter slope 1000 dB/nm (typ.)
• Peak search function
• Wide range of control interfaces including touchscreen

OTF 980
Tuning Flexibility

Independent tuning of the center wavelength and bandwidth

Steep Filter Slope

Different models have from 200 dB/nm to 1000 dB/nm

Peak Search Function

Integrated power meter allows for automatic peak search function

Wide Tuning Range

Up to 85nm in the C-band and L-band. 

*O-band available 


The OTF-980 is a versatile programmable optical tunable filter that allows simultaneous and independent tuning of center wavelength and bandwidth over C & L bands. The OTF-980 is built with novel free-space optics combined with an ultra-fine tuning mechanism to ensure precise filter control and a flat-top passband shape.

There are three versions available with different transmission bandwidth and slope shape with the ultrafine-plus (0.05 to 3 nm bandwidth) having the steepest filter slope (1000 dB/nm). An integrated power meter monitors power at the output and features an automatic peak search function.

GPIB, Ethernet and USB interfaces with the industry standard SCPI command set allows users to have full remote control and measurement automation. The OTF-980 is controlled via the front panel touchscreen.

Features & Characteristics

  • Center wavelength & bandwidth can be tuned independently
  • Flat-top filter shape with steep filter slope
    - Ultrafine-Plus: 0.05 to 3 nm, 1000 dB/nm
    - Ultrafine: 0.08 to 4 nm, 500 dB/nm
    - Standard: 0.1 to 15 nm, 200 dB/nm
  • Wavelength tuning range: 
    - 85 nm in C&L-band
    - O-band is available upon request
  • Peak search function
  • Touchscreen and GPIB/Ethernet/USB interfaces


  • 100 Gb/s, 400 Gb/s transmission test
  • Adjustable and adaptive DWDM, OFDM channel filtering
  • ASE noise filtering
  • Next generation bundle wavelength OXC
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