| 摘要 |
Tunable optical filter, comprising an optical fibre (4) incorporating a dopant, a long-period Bragg grating (5) inscribed in the optical fibre (4), an excitation source (6) for generating an exciting radiation at an excitation wavelength of the dopant, an optical coupler (7) optically connecting the excitation source (6) to the optical fibre (4) and a device (8) for controlling the excitation source (6), for controlling the power of the exciting radiation. |
