Optical: systems and elements – Optical amplifier
Reexamination Certificate
2007-11-01
2009-06-23
Keith, Jack W. (Department: 3663)
Optical: systems and elements
Optical amplifier
C359S334000, C359S337000
Reexamination Certificate
active
07551347
ABSTRACT:
In an optical amplification characteristics simulation apparatus according to the present invention, using spectrums of a signal light input to an optical amplifier and a characteristic parameter for amplification medium, gain wavelength characteristics of the amplification medium are calculated. A calculating formula for the above has a parameter corresponding to a gain fluctuation portion due to a gain spectral hole burning (GSHB) phenomenon, and this parameter is defined by a function obtained by modeling a physical phenomenon in which a population inversion rate is reduced due to the GSHB, based on that electron occupation numbers in each Stark level on the end level side are increased. Then, based on the calculated gain wavelength characteristics, the output power of the signal light is obtained, to thereby perform the optical amplification characteristics simulation on the optical amplifier. As a result, it is possible to construct a high versatile calculation model based on the physical phenomenon for the gain fluctuation due to the GSHB, to thereby simulate with high precision the optical amplification characteristics of the optical amplifier under arbitrary conditions.
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Hayashi Etsuko
Muro Shinichirou
Nishihara Masato
Ono Shunsuke
Tanabe Setsuhisa
Diacou Ari M
Fujitsu Limited
Keith Jack W.
Kyoto University
Staas & Halsey , LLP
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