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US 11,668,870 B2Granted
Optical communication device, optical transmission system, wavelength converter, and optical communication method
AssigneeFujitsu Limited
InventorTomoyuki Kato
Life of this patent
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Abstract
An optical communication device includes an excitation light source that outputs excitation light, a multiplexer that multiplexes signal light and the excitation light outputted from the excitation light source, a first nonlinear optical medium into which the multiplexed excitation light and the signal light are inputted, and a second nonlinear optical medium that is coupled to the first nonlinear optical medium in series and has an optical property different from that of the first nonlinear optical medium.
Claims5
An optical communication device comprising:
- an excitation light source that outputs excitation light;
- a multiplexer that multiplexes signal light and the excitation light outputted from the excitation light source;
- a first nonlinear optical medium into which the multiplexed excitation light and the signal light are inputted;
- and
- a second nonlinear optical medium that is coupled to the first nonlinear optical medium in series and has an optical property different from that of the first nonlinear optical medium, wherein
- the first nonlinear optical medium generates polarization rotation in a first direction, depending on a frequency of a light wave propagating in the first nonlinear optical medium, and
- the second nonlinear optical medium generates polarization rotation in a second direction opposite to the first direction, depending on the frequency.
4 more elements
An optical communication method comprising:
- making input signal light having a first wavelength and excitation light having a second wavelength different from the first wavelength incident on a wavelength converter in which a first nonlinear optical medium and a second nonlinear optical medium having an optical property different from that of the first nonlinear optical medium are coupled in series, to generate converted signal light having a third wavelength different from the first wavelength and the second wavelength;
- and
- outputting, to an optical transmission path, the converted signal light outputted from the second nonlinear optical medium, wherein
- the first nonlinear optical medium generates polarization rotation in a first direction, depending on a frequency of a light wave propagating in the first nonlinear optical medium, and
- the second nonlinear optical medium generates polarization rotation in a second direction opposite to the first direction, depending on the frequency.
2 more elements
Dependencies are inferred from the claim text.