Highly nonlinear chalcogenide optical fibers with flattened chromatic dispersion invariant to the core fluctuation and their performances of parametric amplification

Hoang Tuan Tong; Kenshiro Nagasaka; Takenobu Suzuki; Yasutake Ohishi

doi:10.1117/12.2212087

24 February 2016 Highly nonlinear chalcogenide optical fibers with flattened chromatic dispersion invariant to the core fluctuation and their performances of parametric amplification

Hoang Tuan Tong, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi

Author Affiliations +

Proceedings Volume 9744, Optical Components and Materials XIII; 97440Q (2016) https://doi.org/10.1117/12.2212087
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

We report here the potential of fiber optical parametric amplification (FOPA) by using highly nonlinear chalcogenide double-cladding fibers. The fibers are designed with an AsSe₂-based core layer surrounded by two cladding layers. The size and the refractive index differences (dn) between the core and cladding are investigated to obtain flattened chromatic dispersion spectra over a wide wavelength range up to the mid-infrared window. The inner cladding with dn₂ is added to suppress the variation of the chromatic dispersion caused by the fluctuation of the core diameter. Our numerical calculations shows that very broad anomalous dispersion ranges from 5.0 μm up to 11.0 μm where the chromatic dispersion is less than 10 ps/km-nm can be obtained when the core diameter varies from 2.0 to 9.0 μm and the inner cladding diameter is kept at 9.0 μm. The dn₁ and dn₂ are 0.30 and 0.02, respectively. The FOPA calculation is carried out using a 3-cm-long fiber whose core diameter is 3 μm. When the pump power is 3 W at 5320 nm, a very broad gain bandwidth is obtained from 3.3 up to 11 μm. Moreover, the gain spectrum is flattened (about 32 ± 1 dB) in the ranges from 3.3 to 4.1 μm and from 7.5 up to 11.0 μm. When the core diameter fluctuates from 2.0 to 5.0 μm, the FOPA gain spectra can be maintained.

Citation Download Citation

Hoang Tuan Tong, Kenshiro Nagasaka, Takenobu Suzuki, and Yasutake Ohishi "Highly nonlinear chalcogenide optical fibers with flattened chromatic dispersion invariant to the core fluctuation and their performances of parametric amplification", Proc. SPIE 9744, Optical Components and Materials XIII, 97440Q (24 February 2016); https://doi.org/10.1117/12.2212087

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