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1. (WO2002049243) VERY LOW NOISE FIGURE OPTICAL AMPLIFIER DEVICES AND NOISE REDUCTION METHODS
Dernières données bibliographiques dont dispose le Bureau international   

N° de publication :    WO/2002/049243    N° de la demande internationale :    PCT/CA2001/001774
Date de publication : 20.06.2002 Date de dépôt international : 13.12.2001
CIB :
H04B 10/291 (2013.01)
Déposants : BTI PHOTONICS INC. [CA/CA]; 2191 Thurston Drive Ottawa, Ontario K1G 6C9 (CA) (Tous Sauf US).
LU, Zhenguo [CA/CA]; (CA) (US Seulement).
SO, Vincent [CA/CA]; (CA) (US Seulement)
Inventeurs : LU, Zhenguo; (CA).
SO, Vincent; (CA)
Mandataire : BRETT, Allan; Smart & Biggar P.O. Box 2999, Station D 900-55 Metcalfe Street Ottawa, Ontario K1P 5Y6 (CA)
Données relatives à la priorité :
60/254,856 13.12.2000 US
09/819,748 29.03.2001 US
09/819,760 29.03.2001 US
Titre (EN) OPTICAL AMPLIFIER HAVING AN IMPROVED NOISE FIGURE AND NOISE REDUCTION METHOD
(FR) VERY LOW NOISE FIGURE OPTICAL AMPLIFIER DEVICES AND NOISE REDUCTION METHODS
Abrégé : front page image
(EN)A very low noise figure optical amplifier is provided which includes a noise reduction apparatus as part of the structure of the optical amplifier. To improve the signal-to-noise ratio (SNR) of the amplified optical signal, the noise reduction apparatus makes use of the coherence of a coherent component of an amplified optical signal having a coherent signal power and the incoherence of an incoherent component of the amplified optical signal having an incoherent signal power. The amplified optical signal is split in two path signals with each path signal having the same intensity but a different phase. The optical path length the path signals is selected such that coherent path components are combined constructively at a main output while the power of the incoherent path components is divided between the main output and at least one subsidiary output. The result is an increase in the SNR, and a decrease in noise figure (NF) of approximately 3 dB.
(FR)A very low noise figure optical amplifier is provided which includes a noise reduction apparatus as part of the structure of the optical amplifier. To improve the signal-to-noise ratio (SNR) of the amplified optical signal, the noise reduction apparatus makes use of the coherence of a coherent component of an amplified optical signal having a coherent signal power and the incoherence of an incoherent component of the amplified optical signal having an incoherent signal power. The amplified optical signal is split in two path signals with each path signal having the same intensity but a different phase. The optical path length the path signals is selected such that coherent path components are combined constructively at a main output while the power of the incoherent path components is divided between the main output and at least one subsidiary output. The result is an increase in the SNR, and a decrease in noise figure (NF) of approximately 3 dB.
États désignés : AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, OM, PH, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZM, ZW.
Organisation régionale africaine de la propriété intellectuelle (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Office eurasien des brevets (OEAB) (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
Office européen des brevets (OEB) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
Organisation africaine de la propriété intellectuelle (OAPI) (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Langue de publication : anglais (EN)
Langue de dépôt : anglais (EN)