Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources driven by ultrafast mid-IR pulses
Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core fibers constitute perhaps the most viable solution towards ultrafast, compact, and tunable lasers in the UV spectral region. Noise and spectral stability of such broadband sources are key parameters that define their true pote...
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Published in | arXiv.org |
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Main Authors | , , , , , , |
Format | Paper Journal Article |
Language | English |
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04.09.2019
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Abstract | Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core fibers constitute perhaps the most viable solution towards ultrafast, compact, and tunable lasers in the UV spectral region. Noise and spectral stability of such broadband sources are key parameters that define their true potential and suitability towards real-world applications. In order to investigate the spectral stability and noise levels in these fiber-based DUV sources, we generate an SC spectrum that extends from 180 nm (through phase-matched dispersive waves - DWs) to 4 {\mu}m by pumping an argon-filled hollow-core anti-resonant fiber at a wavelength of 2.45 {\mu}m. We characterize the long-term stability of the source over several days and the pulse-to-pulse relative intensity (RIN) noise of the strongest DW at 275 nm. The results indicate no sign of spectral degradation over 110 hours, but the RIN of the DW pulses at 275 nm is found to be as high as 33.3%. Numerical simulations were carried out to investigate the spectral distribution of the RIN and the results confirm the experimental measurements and that the poor noise performance is due to the RIN of the pump laser, which was hitherto not considered in numerical modelling of these sources. The results presented herein provide an important step towards an understanding of the noise mechanism underlying such complex light-gas nonlinear interactions and demonstrate the need for pump laser stabilization. |
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AbstractList | Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core
fibers constitute perhaps the most viable solution towards ultrafast, compact,
and tunable lasers in the UV spectral region. Noise and spectral stability of
such broadband sources are key parameters that define their true potential and
suitability towards real-world applications. In order to investigate the
spectral stability and noise levels in these fiber-based DUV sources, we
generate an SC spectrum that extends from 180 nm (through phase-matched
dispersive waves - DWs) to 4 {\mu}m by pumping an argon-filled hollow-core
anti-resonant fiber at a wavelength of 2.45 {\mu}m. We characterize the
long-term stability of the source over several days and the pulse-to-pulse
relative intensity (RIN) noise of the strongest DW at 275 nm. The results
indicate no sign of spectral degradation over 110 hours, but the RIN of the DW
pulses at 275 nm is found to be as high as 33.3%. Numerical simulations were
carried out to investigate the spectral distribution of the RIN and the results
confirm the experimental measurements and that the poor noise performance is
due to the RIN of the pump laser, which was hitherto not considered in
numerical modelling of these sources. The results presented herein provide an
important step towards an understanding of the noise mechanism underlying such
complex light-gas nonlinear interactions and demonstrate the need for pump
laser stabilization. Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core fibers constitute perhaps the most viable solution towards ultrafast, compact, and tunable lasers in the UV spectral region. Noise and spectral stability of such broadband sources are key parameters that define their true potential and suitability towards real-world applications. In order to investigate the spectral stability and noise levels in these fiber-based DUV sources, we generate an SC spectrum that extends from 180 nm (through phase-matched dispersive waves - DWs) to 4 {\mu}m by pumping an argon-filled hollow-core anti-resonant fiber at a wavelength of 2.45 {\mu}m. We characterize the long-term stability of the source over several days and the pulse-to-pulse relative intensity (RIN) noise of the strongest DW at 275 nm. The results indicate no sign of spectral degradation over 110 hours, but the RIN of the DW pulses at 275 nm is found to be as high as 33.3%. Numerical simulations were carried out to investigate the spectral distribution of the RIN and the results confirm the experimental measurements and that the poor noise performance is due to the RIN of the pump laser, which was hitherto not considered in numerical modelling of these sources. The results presented herein provide an important step towards an understanding of the noise mechanism underlying such complex light-gas nonlinear interactions and demonstrate the need for pump laser stabilization. |
Author | Markos, Christos Adamu, Abubakar I Peter Uhd Jepsen Lopez, J Enrique Antonio Md Selim Habib Amezcua-Correa, Rodrigo Bang, Ole |
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BackLink | https://doi.org/10.1038/s41598-020-61847-w$$DView published paper (Access to full text may be restricted) https://doi.org/10.48550/arXiv.1909.02130$$DView paper in arXiv |
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Snippet | Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core fibers constitute perhaps the most viable solution towards ultrafast, compact, and... Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core fibers constitute perhaps the most viable solution towards ultrafast, compact, and... |
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SubjectTerms | Argon Broadband Computer simulation Laser stability Mathematical models Noise Noise intensity Noise levels Phase matching Physics - Optics Spectra Tunable lasers |
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Title | Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources driven by ultrafast mid-IR pulses |
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