Patents by Inventor Sergueil Papernyi

Sergueil Papernyi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20060209394
    Abstract: A method for pumping remote optically-pumped fiber amplifiers (ROPAs) in fiber-optic telecommunication systems is disclosed which uses cascaded Raman amplification to increase the maximum amount of pump power that can be delivered to the ROPA. According to the prior art, high power at the ROPA pump wavelength, ?p, is launched directly into the fiber and the maximum launch power is limited by the onset of pump depletion by Raman noise and oscillations due to the high Raman gain at ˜(?p+100) nm. In preferred embodiments of the present invention, a ‘primary’ pump source of wavelength shorter than ?p is launched into the delivery fiber along with two or more significantly lower-power ‘seed’ sources, among which is included one at ?p. The wavelength and power of the seed source(s) are chosen such that, when combined with the high-power primary source, a series, n, where n?2, of Raman conversions within the fiber ultimately leads to the development of high power at ?p.
    Type: Application
    Filed: September 28, 2004
    Publication date: September 21, 2006
    Inventors: Sergueil Papernyi, Vladimir Karpov, Vladimir Ivanov, Wallace Clements