Fabrication of photonic crystal fiber optical attenuators with air hole diameter control using CO2 laser irradiation technique
Photonic crystal fiber attenuators were fabricated using CO2 laser irradiation. The air hole diameter ratio to pitch could be controlled by laser power adjustment. The attenuation could be controlled by adjustment of the air hole ratio. The attenuators exhibited good wavelength independent characteristics. The attenuation phenomena in the attenuators were theoretically discussed.
photonic crystal fiber optical attenuator co2 laser irradiation confinement loss mode field diameter mismatch loss cladding mode