Spectral and coherence signatures of threshold in random lasers
We investigated the spectral and coherence signatures of threshold in random lasers with incoherent feedback consisting of alumina colloidal nanoparticles suspended in rhodamine 6G methanol solution under nanosecond-pulsewidth pumping, based on measurement of temporal and spatial coherence propertie...
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my.usim-84102017-02-23T02:45:14Z Spectral and coherence signatures of threshold in random lasers Deming, Liu, Sandhya, Clement, David W., Coutts, Ewa M., Goldys, Judith M., Dawes, Wan Zakiah, Wan Ismail, Random Lasers Lasing Threshold Emission Spectra Coherence properties We investigated the spectral and coherence signatures of threshold in random lasers with incoherent feedback consisting of alumina colloidal nanoparticles suspended in rhodamine 6G methanol solution under nanosecond-pulsewidth pumping, based on measurement of temporal and spatial coherence properties and comparison with emission spectra. Feedback in this random laser was provided by multiple scattering from the alumina particles, and the effects of particle concentration and scattering length were studied for the weakly scattering and diffusive scattering regimes. At threshold, in each regime, the visibility of the interference fringes jumped abruptly, coinciding with a substantial increase in peak emission intensity and decrease in the linewidth of a single dominant emission peak. 2015-06-19T01:34:33Z 2015-06-19T01:34:33Z 2014-01-01 Article 2040-8978 2040-8986 http://ddms.usim.edu.my/handle/123456789/8410 en_US Iop Publishing Ltd |
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Random Lasers Lasing Threshold Emission Spectra Coherence properties |
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Random Lasers Lasing Threshold Emission Spectra Coherence properties Deming, Liu, Sandhya, Clement, David W., Coutts, Ewa M., Goldys, Judith M., Dawes, Wan Zakiah, Wan Ismail, Spectral and coherence signatures of threshold in random lasers |
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We investigated the spectral and coherence signatures of threshold in random lasers with incoherent feedback consisting of alumina colloidal nanoparticles suspended in rhodamine 6G methanol solution under nanosecond-pulsewidth pumping, based on measurement of temporal and spatial coherence properties and comparison with emission spectra. Feedback in this random laser was provided by multiple scattering from the alumina particles, and the effects of particle concentration and scattering length were studied for the weakly scattering and diffusive scattering regimes. At threshold, in each regime, the visibility of the interference fringes jumped abruptly, coinciding with a substantial increase in peak emission intensity and decrease in the linewidth of a single dominant emission peak. |
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Article |
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Deming, Liu, Sandhya, Clement, David W., Coutts, Ewa M., Goldys, Judith M., Dawes, Wan Zakiah, Wan Ismail, |
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Deming, Liu, Sandhya, Clement, David W., Coutts, Ewa M., Goldys, Judith M., Dawes, Wan Zakiah, Wan Ismail, |
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Deming, Liu, |
title |
Spectral and coherence signatures of threshold in random lasers |
title_short |
Spectral and coherence signatures of threshold in random lasers |
title_full |
Spectral and coherence signatures of threshold in random lasers |
title_fullStr |
Spectral and coherence signatures of threshold in random lasers |
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Spectral and coherence signatures of threshold in random lasers |
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spectral and coherence signatures of threshold in random lasers |
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Iop Publishing Ltd |
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2015 |
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http://ddms.usim.edu.my/handle/123456789/8410 |
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1645152411980922880 |
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13.222552 |