GouMax 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.

Figure 1: Two types of tunable optical filters (Gaussian and Flat-top profiles)

Figure 2: C-band tunable filter

Figure 3: C-band tunable filter and 4-channel tunable filter array

• Single-band tunable filter
  • O/E/S/C/L/U-band
  • Gaussian profile
  • Flat-top profile
• Dual-band OSA modules
  • O+E/C+L band
• Full-band OSA modules
  • 1250~1650 nm
• Tunable filter array
  • 4-in-1 module
  • Gaussian profile

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