Fabry-Perot Fiber Optic Filter – 0.1-0.05nm Linewidth

SKU: FPTF

The FPTF is a fiber-coupled Fabry-Perot Tunable Filter based on a fiber tip-gap etalon cavity driven by a piezoelectric actuator. It features narrow linewidth, wide tuning range, low optical loss, and fast tuning speed. The tuning range exceeds 100 nm, corresponding to the etalon’s first-order free spectral range (FSR). Tuning beyond one FSR enters higher interference orders, potentially degrading signal quality. The piezo actuator supports scanning rates up to ~1 kHz, with resonant operation near 30 kHz. Due to inherent piezo drift, closed-loop feedback is recommended for wavelength stabilization. A full-function controller with small-amplitude dithering is available for precise tuning and control. The filter remains transparent outside its tuning band. The FPTF provides a cost-effective solution for high-speed wavelength scanning, spectroscopy, and tunable source applications requiring moderate finesse and rapid tuning.