{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T05:21:56Z","timestamp":1761110516101,"version":"build-2065373602"},"reference-count":43,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2020,4,27]],"date-time":"2020-04-27T00:00:00Z","timestamp":1587945600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science  Foundation of China","award":["61275137, 61571186"],"award-info":[{"award-number":["61275137, 61571186"]}]},{"name":"Key Research and Development Program of Changsha","award":["kq1901027"],"award-info":[{"award-number":["kq1901027"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Shaping is very necessary in order to obtain a wide and flat supercontinuum (SC). Via numerical simulations, we accurately demonstrated shaping the SC using the fiber cascading method to significantly increase the width as well as the flatness of the spectrum in silica photonic crystal fiber (PCF). The cascaded PCF contains two segments, each of which has dual zero-dispersion frequencies (ZDFs). The spectral range of the SC can be expanded tremendously by tuning the spacing between the two ZDFs of the first segmented cascaded PCF. Increasing the pump power generates more solitons at the red edge, which accelerates solitons trapping and improves the spectral flatness of the blue edge. Furthermore, cascading the second segmented PCF by choosing appropriate fiber parameters ensures the flatness of the red end of SC. Therefore, a cost-effective alternative method for broad and flat supercontinuum generation in the near-infrared range is proposed here, which can be implemented easily in any photonics laboratory, where dual ZDFs PCFs are commonly found.<\/jats:p>","DOI":"10.3390\/s20092478","type":"journal-article","created":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T10:30:58Z","timestamp":1588069858000},"page":"2478","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Accurately Shaping Supercontinuum Spectrum via Cascaded PCF"],"prefix":"10.3390","volume":"20","author":[{"given":"Jifang","family":"Rong","sequence":"first","affiliation":[{"name":"College of Computer Science and Electronic Engineering, Key Laboratory for Micro\/Nano Optoelectronic Devices of Ministry of Education, Hunan University, Changsha 410082, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hua","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Computer Science and Electronic Engineering, Key Laboratory for Micro\/Nano Optoelectronic Devices of Ministry of Education, Hunan University, Changsha 410082, China"},{"name":"Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha 410082, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuzhe","family":"Xiao","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, University of Wisconsin-Madison, Madison, WI 53715, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,4,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"584","DOI":"10.1103\/PhysRevLett.24.584","article-title":"Emission in the region 4000 to 7000 \u00c5 via four-photon coupling in glass","volume":"24","author":"Alfano","year":"1970","journal-title":"Phys. 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