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1. (WO2010150241) OPTICAL SIGNAL TO NOISE RATIO MONITORING TECHNIQUE AND SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2010/150241    International Application No.:    PCT/IL2010/000428
Publication Date: 29.12.2010 International Filing Date: 30.05.2010
IPC:
H04B 10/079 (2013.01)
Applicants: ECI TELECOM LTD. [IL/IL]; 30 Hasivim Street 49517 Petach-Tikva (IL) (For All Designated States Except US).
DAHAN, David [IL/IL]; (IL) (For US Only).
MAHLAB, Uri [IL/IL]; (IL) (For US Only).
LEVY, David [IL/IL]; (IL) (For US Only)
Inventors: DAHAN, David; (IL).
MAHLAB, Uri; (IL).
LEVY, David; (IL)
Agent: LEVIN, Helena; ECI Telecom Ltd. Patent and Trademark Department 30 Hasivim Street 49517 Petach-Tikva (IL)
Priority Data:
199508 23.06.2009 IL
Title (EN) OPTICAL SIGNAL TO NOISE RATIO MONITORING TECHNIQUE AND SYSTEM
(FR) TECHNIQUE ET SYSTÈME DE SURVEILLANCE DE RAPPORT SIGNAL SUR BRUIT OPTIQUE
Abstract: front page image
(EN)For determining OSNRreal of a real optical signal carried in an optical network link, the following has been proposed: tapping a portion of the real optical signal, altering the tapped signal portion by adding to it in-band artificial noise signal, thus obtaining a combined signal, scattering the combined signal by stimulated Brillouin or Raman scattering (SBS or SRS) in an optical element, extracting a signal back reflected by SBS/SRS from the optical element, determining OSNRcomb of the back reflected signal and deriving the OSNRreal from the OSNRcomb knowing absolute and/or relative power of the added artificial noise.
(FR)Pour déterminer le rapport signal sur bruit optique réel (OSNRreal) d'un signal optique réel transporté dans une liaison de réseau optique, l'invention propose de réaliser les opérations suivantes : prélever une partie du signal optique réel, modifier la partie de signal prélevé par addition à celle-ci d'un signal de bruit artificiel dans la bande, pour ainsi obtenir un signal combiné, diffuser le signal combiné par diffusion Brillouin ou Raman stimulée (SBS ou SRS) dans un élément optique, extraire de l'élément optique un signal rétroréfléchi par SBS/SRS, déterminer le OSNRcomb du signal rétroréfléchi et obtenir le OSNRreal à partir du OSNRcomb en connaissant la puissance absolue et/ou relative du bruit artificiel additionné.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)