RESUMEN
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.
RESUMEN
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.
RESUMEN
Aiming at maintaining the chromatic dispersion properties and fiber optical parametric amplification (FOPA) performance when fiber core fluctuation occurs, we propose a buffer step-index optical fiber. The AsSe2 chalcogenide glass is employed as the core material due to its high nonlinearity and broad transmission spectrum. The calculated results in this study show that the chromatic dispersion variation due to the change of core diameter can be greatly suppressed and a continuous and very broad FOPA signal gain spectrum can be obtained and maintained by carefully controlling the core, buffer and cladding properties such as refractive index and diameters. The calculated results in this study showed that by using the proposed 3-cm-long fiber pumped at 5.02â µm, a broad signal gain bandwidth from 3 to 14â µm at about 15â dB is attainable although the fiber core diameter Dc drastically fluctuated from 2 to 5â µm and the buffer diameter Db varies from 8.9 to 9.3â µm. Moreover, when Dc varies in smaller range from 3 to 4â µm, the FOPA signal gain spectra calculated at different fixed values of Db in the range from 8.9 to 9.3â µm are highly maintained. When Db is kept at 9.0â µm and Dc varies from 3 to 4â µm, the calculated FOPA signal gain spectra at different pump wavelengths from 4.98 to 5.02â µm are also nearly identical in the wavelength range from 3 up to 13â µm.
RESUMEN
We experimentally demonstrate for the first time a successful fabrication of a tellurite hollow core optical fiber which has a mid-infrared transmission range. The wall thickness of each cladding air-hole is about 2.8â µm and the outer diameter of the full air-hole structure D is approximately 110â µm. The results show that the measured transmission spectrum can expand up to 3.9â µm. In addition, it is expected that the transmission can extend to around 6â µm. When the input light is linearly polarized, it can be maintained after propagating through a 17-cm-long fiber.