Fiber Raman Amplifier (FRA) is also a relatively mature optical amplifier. In a FRA, the optical signal is amplified due to stimulated Raman scattering (SRS). In general, FRA can is divided into lumped type called LRA and distributed type called DRA.
National Sibling Day is a day to appreciate and cherish your brothers and sisters. Siblings are truly a special blessing that we probably all too often take for granted. They are often our best friends and supporters through life. Another reason to celebrate is that not everyone is lucky enough to have siblings.
Make National Siblings Day a real day. Sign our Petition Now! http://chn.ge/1Qf5xxD Need 200,000 signatures to make the day official! We have created a fun video to watch. Visit https://youtu.be/TPuN_-6Q6b0 Deadline has been extended.