A numerical simulation is performed to study the far-field diffraction properties of planar diamond waveguides. The far-field intensity distributions of a planar air waveguide and a diamond waveguide with different distances are given by numerical calculations. In the experiment, the diffraction patterns on the screen with different distances are recorded using a He-Ne laser as the light source, wherein the laser beam is coupled with and propagates in the diamond waveguide. The simulation results are found to be consistent with the experimental ones.
© 2014 Chinese Optics Letters
(220.2560) Optical design and fabrication : Propagating methods
(230.7390) Optical devices : Waveguides, planar
(260.6970) Physical optics : Total internal reflection
(070.7345) Fourier optics and signal processing : Wave propagation
Xiuyun Ren, Zhaoshuo Tian, Min Yang, Yanfeng Zhang, and Shiyou Fu, "Study on diffraction characteristics of a planar diamond waveguide," Chin. Opt. Lett. 12, 022302- (2014)