| 摘要 |
A laser cavity is formed from two mirrors and an erbium fiber gain medium. One mirror is a dichroic mirror and the other is formed by a grating. The grating period determines the wavelength of light that is reflected, and can be changed by physically stretching or constricting the substrate to which the grating is attached. In one embodiment, the laser is tuned by adjusting the dimensions of the grating using a heating element. In another embodiment, the dimensions of the grating are adjusted using a piezoelectric ceramic material to which the grating is mounted.
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