Raman amplifier with signal modulated before stimulated brillouin scattering occurs
AssigneeFujitsu Limited
InventorsYuichi Suzuki, Norifumi Shukunami
Life of this patent
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Abstract
An optical amplifier includes a light source that outputs light having an intensity corresponding to a supplied driving power; a modulator that modulates the light output from the light source in response to an input modulation signal; a Raman amplifier that performs Raman amplification on the light modulated by the modulator using a highly-nonlinear medium; and a driver that supplies the driving power to drive the light source and inputs the modulation signal to the modulator. The driver starts inputting the modulation signal to the modulation unit before the intensity of the light propagating through the Raman amplifier exceeds an intensity value at which stimulated Brillouin scattering occurs in the Raman amplifier.
Claims11
An optical amplifier comprising:
- a light source that outputs light having an intensity corresponding to a supplied driving power;
- a modulator that modulates the output light in response to an input modulation signal;
- a Raman amplifier that performs Raman amplification on the modulated light using a nonlinear medium;
- and
- a driver that supplies the driving power to drive the light source and inputs the modulation signal to the modulator, wherein
- the driver starts inputting the modulation signal to the modulator before the driving power is supplied to the light source and before the intensity of the light propagating through the Raman amplifier exceeds an intensity value at which stimulated Brillouin scattering occurs in the Raman amplifier.
A method of driving an optical amplifier including a light source that outputs light having an intensity corresponding to a supplied driving power, a modulator that modulates the light output from the light source in response to an input modulation signal, a Raman amplifier that performs Raman amplification on the light modulated by the modulator using a highly-nonlinear medium, and a driver that supplies the driving power to drive the light source, the method comprising:
- inputting the modulation signal to the modulator before the driving power is supplied to the light source and before the intensity of the light propagating through the Raman amplifier exceeds an intensity value at which stimulated Brillouin scattering occurs in the Raman amplifier;
- and
- increasing the driving power supplied to the light source after the modulation signal is input.
A method of driving an optical amplifier, comprising:
- outputting light having an intensity corresponding to a supplied driving power;
- modulating the output light in response to an input modulation signal;
- performing Raman amplification on the modulated light;
- inputting the input modulation signal to a modulator before the driving power is supplied to a light source and before an intensity of the light exceeds an intensity value at which stimulated Brillouin scattering occurs in a Raman amplifier;
- and
- increasing the supplied driving power after the modulation signal has been input.
Dependencies are inferred from the claim text.