Transverse Anderson localization of mid-infrared light in a chalcogenide transversely disordered optical fiber.

We successfully fabricate a transversely disordered optical fiber made of AsSe2 and As2S5 glasses for high-resolution mid-infrared image transport. By using the fabricated fiber, we experimentally observe transverse Anderson localization of mid-infrared light at the wavelength of 3 µm. Moreover, we numerically evaluate the localization in the fiber by using a cross-sectional image of the fiber.

Chalcogenide all-solid hybrid microstructured optical fiber with polarization maintaining properties and its mid-infrared supercontinuum generation.

In this paper, we report a successful fabrication of a highly nonlinear chalcogenide all-solid hybrid microstructured optical fiber with polarization maintaining properties and a mid-infrared SC generation. Up to 4.5 × 10-4 at 10 µm of the fiber birefringence can be realized by employing a single As2Se3 core and two As2S5 rods horizontally aligned in the AsSe2 cladding. The fiber possesses a near-zero and flattened all-normal chromatic dispersion profile over the wavelength range from 5 to 10 µm. The polarization maintaining properties of the fiber is experimentally confirmed and a broadband supercontinuum spectrum from 2 to 10 µm in the mid-infrared window was experimentally demonstrated.

Supercontinuum generation in a chalcogenide all-solid hybrid microstructured optical fiber.

We report the fabrication of a chalcogenide all-solid hybrid microstructured optical fiber and its application in supercontinuum generation for the first time, to the best of our knowledge. The fiber possesses all-normal and flattened chromatic dispersion, making it highly potential for broad and coherent supercontinuum generation. By pumping the fiber with a femtosecond laser at 3, 4, and 5 µm, broad supercontinua with good spectral flatness are generated. The broadest SC spectrum extending from 2.2 to 10 µm at -20 dB level was obtained when the fiber was pumped at 5 µm with an input power of 3.9 mW.

Mid-infrared wavelength conversion using dispersion-engineered As2S5 microstructured optical fiber pumped with an ultrafast laser at 2 µm.

We fabricate a dispersion-engineered As2S5 microstructured optical fiber for demonstration of frequency conversion in one of the atmospheric-transparent windows in the mid-infrared domain. The experimentally obtained results show that parametric wavelength conversion at 4.5 µm is obtained using fabricated microstructured optical fiber pumped with 200 fs laser pulses of average power of 20 mW at 2 µm. Obtained detuning frequency from the pump frequency was ∼84THz. To the best of our knowledge, the mid-infrared wavelength conversion at 4.5 µm in fiber configuration has been demonstrated for the first time. The experimentally observed result matches well with numerically simulated phase-matching conditions.