GouMax single-band tunable optical filter (TOF) product is designed using its proprietary micro-optics and tunable technology. It is a 2-port voltage-controlled fiber-optic device with UART (RS232)/USB communication interface. The filter passband shape can be either Gaussian or flat-top. As schematically shown in Figure 1 below, when multiple DWDM channels are injected to the input port, the tunable filter selects one target channel to the output port and blocks all other channels. If the input is a wide-band spectrum, the tunable filter will select a target band for output and reject the rest band of spectrum.

GouMax single-band TOF modules support C-, L-, O-, E-, S-, and U-band operation within 1250~1650 nm range. Both Gaussian and flat-top profiles are available.

 
Figure 1: C-band tunable optical filter

 Figure 2: Two types of tunable optical filters (Gaussian and Flat-top profiles)

Figure 3: Flat-top filter spectrum

• Visible to NIR wavelength range
• Customer-specified pass bandwidth
• High speed tuning
• High wavelength repeatability
• No mechanical wear-outs
• Long tuning durability
  

• Optical signal selection
• Optical performance monitoring
• Optical signal ASE noise suppression
• Optical Add/Drop multiplexing
• Optical signal tracking
• Wavelength interrogation
• Wavelength control of tunable laser
  

For any single-band Gaussian TOF module, the Operating wavelength range is 45 nm, specified as Center wavelength ± 22.5 nm.

For details, please request specifications from GouMax Sales.

For any single-band flat-top TOF module, the Operating wavelength range is 45 nm, specified as Center wavelength ± 22.5 nm.

For details, please request specifications from GouMax Sales.