Hello Gagan,thanks for attaching paper.you can design this system in optisystem.because in optisystem 7 there are all the components you need to reakize this system.circulators ,lasers ,coouplers you can set their ratio as well,you can make hnlf by just changing specifications of fiber.however here you need a fiber which works bidirectionally.you can go for raman fiber in amolifier library and change its parameter.if you will face any problem then share with us.
Regards
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