Maximizing the bandwidth while minimizing the spectral fluctuations using supercontinuum generation in photonic crystal chalcogenide fibers

C. R. Menyuk; R. J. Weiblen; J. Hu; L. B. Shaw; J. S. Sanghera; I. D. Aggarwal

doi:10.1117/12.2031967

15 October 2013 Maximizing the bandwidth while minimizing the spectral fluctuations using supercontinuum generation in photonic crystal chalcogenide fibers

C. R. Menyuk, R. J. Weiblen, J. Hu, L. B. Shaw, J. S. Sanghera, I. D. Aggarwal

Author Affiliations +

Proceedings Volume 8898, Technologies for Optical Countermeasures X; and High-Power Lasers 2013: Technology and Systems; 88980C (2013) https://doi.org/10.1117/12.2031967
Event: SPIE Security + Defence, 2013, Dresden, Germany

Abstract

Recent computational work to optimize the output spectrum of As₂Se₃ and As₂S₃ chalcogenide photonic crystal fibers is summarized. Design procedures for both maximizing the output bandwidth and maximizing the power spectral density in the 3-5 μm range are described. With a 2.5μm pulsed pump source, it is possible to obtain a bandwidth of 4 μm in As₂Se₃ fibers, and, with a 2.0 μm pulsed pump source, it is possible to shift 25% of the input power to the 3-5 μm range in As₂S₃. With a source at 2.8 μm, it is possible to obtain an output power spectral density in As₂S₃ that extends between 2.5 μm and 6.5 μm. The single-shot output power spectral density exhibits rapid 10-20 dB fluctuations as the wavelength varies. Moreover, when the pump pulse duration and peak power vary, there are substantial shot-to-shot fluctuations in both the output bandwidth and spectral power density. With 10% variations of the pump pulse duration and peak power, the output spectrum averaged over 5000 shots exhibits less than 5 dB of variation in the intermediate wavelength range of 2.8-4.6 μm and has a reproducible bandwidth of slightly less than 3 μm. The average over 5000 shots yields the same output spectrum with 10⁶ shots, indicating that the spectrum has converged.

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C. R. Menyuk, R. J. Weiblen, J. Hu, L. B. Shaw, J. S. Sanghera, and I. D. Aggarwal "Maximizing the bandwidth while minimizing the spectral fluctuations using supercontinuum generation in photonic crystal chalcogenide fibers", Proc. SPIE 8898, Technologies for Optical Countermeasures X; and High-Power Lasers 2013: Technology and Systems, 88980C (15 October 2013); https://doi.org/10.1117/12.2031967

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