WL Photonics Tuneable Filters

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.BBN International supplies WL Photonics bandpass tuneable optical filter

• Both center wavelength and bandwidth tunable
  
• No moving optical part platform
  
• Unprecedented low insertion loss and polarization-dependent loss (PDL)
  
• Sharp filter edge roll-off slop
  
• Flat-top profile of transmission band
  
• Up to 120nm wavelength tuning range
  
• High out-band suppression
  
• High optical power handling
  

Bandwidth Variable Filter of BWTF-series is built based on free-space optics combing with diffraction grating to produce a flat-top transmission. It is a 2-port fibre-optic device. When a wide-band spectrum is injected to the input port, the tuneable filter will select a target band for output and reject the rest band of spectrum. Transmission bandwidth is variable at a centre wavelength fixed within some spectral range. Bandwidth adjustment is actuated by either a precise micrometer driver or a micro step-motor connected to a PC through a USB interface in which actuation is monitored by a built-in encoder and controlled dynamically in a
closed-loop.
Patent-pending optics design offers a great option of bandwidths and tuning ranges with unprecedented low insertion loss and polarisation dependent loss (PDL) in the market. Precise tuning mechanism enables filters to provide high wavelength resolution and excellent wavelength-tuning repeatability. Both of manual and electric version filters are available over X-, O-, S-, C-, & L- bands.

Narrowband Tuneable Filters of WLTF-NM- & WLTF-NE- series are built based on free-space optical Fourier transformation combing with diffraction grating. Patent-pending optics design offers great options of bandwidth with unprecedented low insertion loss and polarisation dependent loss (PDL). Precise tuning mechanism enables filters to provide high wavelength resolution and 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.BBN International supplies WL Photonics narrowband optical tuneable 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.BBN International supplies WL Photonics wideband tuneable optical filter