{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T00:48:06Z","timestamp":1777682886556,"version":"3.51.4"},"reference-count":17,"publisher":"SAGE Publications","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JHS"],"published-print":{"date-parts":[[2022,7,29]]},"abstract":"<jats:p>In order to further increase the span length of the Optical Transport Network (OTN) transmission system, a combination of Raman amplifier and remotely optical pumped amplifier (ROPA) configuration scheme is recommended. Optimal EDF length, optimal ROPA position and OTN span limitation are obtained through simulations. A field-trial with 8*10\u00a0Gb\/s in 380\u00a0km span system is carried out with the amplifier configuration of Raman amplifier plus first-order and second-order remotely pumped amplifier. By adding a second-order remote pump laser, the transmission limit is increased from 77.5\u00a0dB to 80.7\u00a0dB. Through detailed analysis of the system, it is concluded that the second-order remote pump can effectively transfer the pump power to the first-order remote pump wavelength, which greatly increases the pump power at the gain module, thereby increasing the gain of the RGU and reduce its noise. Moreover, the introduction of the second-order remote pump effectively weakened the self-excited effect and overcomes the shortcomings of the low pump power threshold of the first-order remote pump.<\/jats:p>","DOI":"10.3233\/jhs-220688","type":"journal-article","created":{"date-parts":[[2022,7,29]],"date-time":"2022-07-29T11:24:59Z","timestamp":1659093899000},"page":"157-165","source":"Crossref","is-referenced-by-count":3,"title":["Design of ultra-long-distance optical transport networks based on high-order remotely pumped amplifier"],"prefix":"10.1177","volume":"28","author":[{"given":"Ronghua","family":"Chi","sequence":"first","affiliation":[{"name":"Artificial Intelligence Academy, Wuxi Vocational College of Science and Technology, Wuxi 214068, China"},{"name":"Wuxi Taclink Optoelectronics Technology Co., Ltd., Wuxi 214068, China"},{"name":"National Research Center for Optical Sensing\/Communications Integrated Networking, Southeast University, Nanjing 210096, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leilei","family":"Li","sequence":"additional","affiliation":[{"name":"Artificial Intelligence Academy, Wuxi Vocational College of Science and Technology, Wuxi 214068, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sang","family":"Gui","sequence":"additional","affiliation":[{"name":"Wuxi Taclink Optoelectronics Technology Co., Ltd., Wuxi 214068, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fei","family":"Wang","sequence":"additional","affiliation":[{"name":"Wuxi Taclink Optoelectronics Technology Co., Ltd., Wuxi 214068, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zijian","family":"Mao","sequence":"additional","affiliation":[{"name":"National Research Center for Optical Sensing\/Communications Integrated Networking, Southeast University, Nanjing 210096, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaohan","family":"Sun","sequence":"additional","affiliation":[{"name":"National Research Center for Optical Sensing\/Communications Integrated Networking, Southeast University, Nanjing 210096, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ning","family":"Cao","sequence":"additional","affiliation":[{"name":"Artificial Intelligence Academy, Wuxi Vocational College of Science and Technology, Wuxi 214068, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","reference":[{"key":"10.3233\/JHS-220688_ref1","doi-asserted-by":"crossref","unstructured":"G.P.\u00a0Agrawal, Nonlinear Fiber Optics, Academic Press, 2005.","DOI":"10.1016\/B978-012369516-1\/50011-X"},{"key":"10.3233\/JHS-220688_ref2","doi-asserted-by":"publisher","DOI":"10.1007\/s11082-020-02400-x"},{"key":"10.3233\/JHS-220688_ref3","doi-asserted-by":"crossref","unstructured":"H.\u00a0Bissessur et al., Unrepeatered transmission of 29.2\u00a0Tb\/s over 295\u00a0km with probabilistically shaped 64 QAM, in: Proc. 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