Optical: systems and elements – Optical amplifier – Optical fiber
Reexamination Certificate
2005-02-08
2005-02-08
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Optical fiber
Reexamination Certificate
active
06853480
ABSTRACT:
The present invention relates to a main wavelength band of a pump light source capable of improving the pump efficiency while using 1.6 μm fluorescence emitted from Ho3+:5I5→5I7transition as an optical amplifier, and an assistant pump wavelength band capable of accomplishing population inversion between5I5level and5I7level to improve the signal gain characteristics of such amplifier. The optical amplifier using optical materials to which holmium or holmium and terbium, holmium and europium, holmium and neodymium or holmium and dysprosium, etc. are doped can be pumped using a light source that emits light of 11,200˜11,500 cm−1or a light source that emits light of 6,000˜6,500 cm−1.
REFERENCES:
patent: 3786365 (1974-01-01), Robinson et al.
patent: 5042039 (1991-08-01), Edagawa et al.
patent: 5341237 (1994-08-01), Tohmon et al.
patent: 5432806 (1995-07-01), Snitzer
patent: 5861981 (1999-01-01), Jabr
patent: 6407853 (2002-06-01), Samson et al.
patent: 6413891 (2002-07-01), Cho et al.
patent: 6549330 (2003-04-01), Choi et al.
patent: 6667257 (2003-12-01), Cole et al.
patent: 20010026654 (2001-10-01), Kasamatsu
Saissy et al, Journal of Lightwave Tech., vol. 9, # 11, PP 1467-1470, 11/91. Abstract only herewith.*
Funk et al, Electronics Letters, vol. 33, No. 23, PP 1958-1960, Nov. 6, 1997; Abstract only herewith.*
Carbonnier et al, Electronics Letters, vol. 34, No. 9, pp 893-894, Apr. 30, 1998; Abstract only herewith.*
Funk et al, IEEE Jour. Quantum Mechanics, vol. 37, No. 8, pp 980-992, 8/01; Abstract only herewith.*
Choi et al. Trivalent holmium-activated fluoride fiber for potential 1340/spl sim/1400nm optical amplifiers. OFC 2002. Mar. 17-22, 2002. pp. 462-463.*
M.C. Brierley, et al.; Lasting at 2:08 um and 1.38 um in a Holmium . . : Electronics Letters; Apr. 1998, vol. 24, No. 9, pp. 539-540.
D. S. Funk, et al.; Excitation Spectra of the Green . . ; IEEE Photonics Technology Letters.; Feb. 1993; vol. 5, No. 2, pp. 154-157.
X.X. Zhang, et al.; Ho3+ to Yb3+ back transfer and thermal . . ; Appl. Phys. Lett.; Nov. 1993; vol. 63, No. 19, pp. 2606-2607.
T. Schweizer, et al.; Infrared emission from holmium . . ; Infrared Physics & Technology; 40(1999) 329-335.
Cho Doo Hee
Choi Yong Gyu
Heo Jong
Kim Kyong Hon
Lee Tae Hoon
Electronics and Telecommunications Research Institute
Hellner Mark
Hughes Deandra M.
Piper Rudnick LLP
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