Research of a high-speed high-stability high-accuracy wavelength converter for large-capacity ultra-low-power networks

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Two key technologies are developed. One is a high-speed laser current drive circuit which has a very short rise-time of 5 ns. The other is a laser current control algorithm consisting of the feedback control with an appropriately deduced control parameter and the feedforward control, which realizes wavelength stability within +/- 1GHz. With these two technologies, the wavelength of the laser can be stabilized within 20 ns. Moreover, the wavelength converter made of the laser has a stable operation within 50 ns at a wavelength range between 1540 nm and 1560 nm.