Bandpass Tuneable Filter

Short & Long Bandpass Tuneable Filters of WLTF-BM- & WLTF-BE- series are built based on free-space optical Fourier transformation combing with diffraction grating to implement passband tuning. Unique optics design produces an access of selecting spatially desired spectral ingredients, either long pass or short pass, of input light and offers flat transmission in passband with unprecedented low insertion loss and polarisation dependent loss (PDL). Precise tuning mechanism enables filters to provide high wavelength resolution and excellent wavelength repeatability.

Features

• Long-pass or short-pass type available
• Unprecedented low insertion loss and polarisation-dependent loss (PDL)
• Sharp filter edge roll-off slop
• Up to 120nm wavelength tuning range
• Wavelength range available over X-, O-, S-, C- and L- bands
• High out-band suppression
• High optical power handling

Applications

• ASE noise suppression
• Wideband WDM channel filtering
• Pulse shaping and compression
• Analysis of op