Abstract
A photonic crystal fibre Brillouin laser based on fibre Bragg grating Fabry–Perot cavity is presented. A highly nonlinear photonic crystal fibre 25m in length is used as Brillouin gain medium and fibre Bragg grating Fabry–Perot cavity is chosen in order to enhance the laser conversion efficiency and suppress the higher-order Stokes waves. The laser reaches the threshold at input power of 35mW, and the experimental laser conversion efficiency achieves 18% of the input power of 140mW and does not show higher-order Stokes waves. A photonic crystal fibre Brillouin laser with shorter fibre length and lower threshold is experimentally realized.
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