Asahi Glass Company, Limited

Fujitsu Corporation

Kyoto University

Setsuhisa Tanabe

Naoki Sugimoto

Setsuro Ito

Masato Nishihara

Etsuko Hayashi

Yuki Kondo

Shinichirou Muro

Tatsuo Nagashima

Shunsuke Ono

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.

Optical amplification characteristics simulation apparatus and optical amplification characteristics simulation method

An optical amplifier glass comprising a matrix glass containing Bi O and at least one of Al O and Ga O , and Er doped to the matrix glass, wherein from 0.01 to 10% by mass percentage of Er is doped to the matrix glass which has a total content of Al O and Ga O of at least 0.1 mol %, a content of Bi O of at least 20 mol %, a refractive index of at least 1.8 at a wavelength of 1.55 &mgr;m, a glass transition temperature of at least 360&deg; C. and an optical basicity of at most 0.49.

Optical amplifier glass

An optical amplifying glass comprising a matrix glass and from 0.001 to 10% by mass percentage of Tm doped to the matrix glass, wherein the matrix glass contains from 15 to 80 mol % of Bi O and further contains at least one component selected from the group consisting of SiO , B O and GeO .

Optical amplifying glass

Growing community of inventors

Kyoto, Japan

Setsuhisa Tanabe