Realization of spectral beam combination using silicon crystal structure via photonic bandgap analysis

The spectral beam combination using bandgap analysis of photonic crystal structure at wavelength 1310 nm and 1550 nm is thoroughly investigated. Here photonic crystal structure is realized by three layers of alternative silicon (1st and 3rd layer) and air (2nd layer) material. The absorption losses in these materials are zero at aforementioned wavelengths. Simulation result revealed that structural parameters such as refractive indices and thickness of odd and even layer play an important role to find out spectral beam combining application. For examples; photonic crystal structure having thickness 500 nm of odd and even layers reflects both 1310 nm and 1550 nm wavelength. Similarly photonic crystal structure having thickness, 750 nm of odd and 250 nm of even layer reflects 1310 nm and transmits 1550 nm wavelength of light. Also, photonic crystal structure having thickness 850 nm of odd and 150 nm of even layer reflects 1550 nm and transmits 1310 nm wavelength of light. And photonic crystal structure having thickness 980 nm of odd and 20 nm of even layers transmits both 1310 nm and 1550 nm wavelength of light.