| Tunable optical filter - US 20020149850 A1 |
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| 2016-02-01 |
| A tunable optical notch filter employing a Fabry-Perot etalon has a first partially reflective mirror and a second mirror with variable effective reflectivity. Both the gap of the etalon and the effective reflectivity of the second mirror can be controlled, e.g. by TAB actuators, enabling a control of the central wavelength and the depth (loss) of the notch of the spectral response of the filter. |
