Wideband Tuneable Optical Filter

Wideband Tuneable Filters of WLTF-WM- & WLTF-WE- series are built based on free-space optical Fourier transformation combing with diffraction grating. Unique optics design produces an access of selecting spatially desired spectral ingredients of input light and offers flat- top transmission spectral shape with flexible
bandwidth and unprecedented low insertion loss and polarisation dependent loss (PDL). Precise tuning mechanism enables filters to provide high wavelength resolution and excellent wavelength repeatability.
Both of manual and electric version filters are available over X-, O-, S-, C-, & L-bands. Wavelength-tuning is actuated by either a precise micrometer driver or a built-in micro motor connected to a PC through a USB (I²C or SPI) interface in which actuation is monitored by a built-in encoder and controlled dynamically in a closed-loop. Motor control software is provided.

Features

• Unprecedented low insertion loss and polarisation dependent loss (PDL)
• Flat-top transmission spectral shape
• Sharp filter edge roll-off slop
• High power handling
• Up to 120nm wavelength tuning range
• Up to tuning range bandwidth
• Spectral range available over X-, O-, S-, C- and L- bands
• High out-band suppression

Applications

• ASE noise suppression
• CWDM channel filtering
• Pulse shaping
• Signal filtering