Tunable Optical Filter Employing a Novel Quartz Cavity Etalon by Precise Angle Tuning

摘要

A temperature-insensitive quartz cavity Fabry-Perot etalon is used in an angle-tuned optical filter. A new high precise orientation technique is introduced to locate the etalon angle precisely based on a position sensitive detector. The tunable optical filter has high temperature-stability, perfect repeatability and high resolution. The repeatability precision is better than 0.01 nm. The resolution is 0.004 nm.