Optical Tunable Filters

Thermally Tunable FBG Filter – 0.07nm Linewidth, 2nm Tuning

The TTFG series tunable optical filter integrates a fiber Bragg grating (FBG) with a thermally controlled tuning platform to provide narrow-linewidth filtering with wide center-wavelength adjustability. Two configurations are available: a two-port reflection version that functions as a tunable notch filter, and a three-port transmission-reflection version with an integrated circulator that operates as a tunable bandpass filter. Standard FBG linewidths are offered from 0.07 nm to 2 nm, with narrower custom designs available. Our circulators cover 350–2200 nm, enabling broad system compatibility for three-port TTFG solutions. The module includes an integrated driver with USB GUI control for plug-and-play operation, along with a DC power supply.