| 摘要 |
An efficient, wavelength independent, small optical amplifier includes an optical transmitter, a signal light inputter supplying light to the optical transmitter, an amplified light fiber connected to the optical transmitter, an excitation source supplying pump light to the light amplified fiber, an optical filter connected between the light amplified fiber and the excitation source for reflecting the signal light and transmitting the pump light, and an outputter for outputting the amplified signal light. The amplifier may also include another light amplified fiber connected to the optical transmitter, another excitation source, and another optical filter for further amplifying the signal light amplified by the light amplified fiber. The wavelengths output by the excitation sources may differ to provide more efficient amplification. The signal light may include different wavelengths, resulting in a wavelength dependency of gain for the amplifier. In order to compensate for this wavelength dependency, the material, the length, the dopant level, and/or the core diameter used for the light amplified fibers may differ, again the wavelength of the excitation sources may differ, and the optical filters may only pass different certain wavelengths. Portions fed by the respective terminal may be integrated to reduce the number of elements and size of the amplifier.
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