28 October 2009 Theoretical investigation on frequency chirp of gain-clamped wavelength converter
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A novel semiconductor optical wavelength converter based on gain-clamping structure is proposed. It consists of paired fiber Bragg gratings and tilted-waveguide SOA chip. And inverted wavelength conversion can be achieved by utilizing direct optical modulation of gain-clamping lasing light, i.e. converted signal. Frequency chirp of converted signal is numerically simulated, derived from single-mode rate equation and large-signal dynamic model. The results show that the mode frequency shifts toward the blue side near the leading edge and toward the red side near the trailing edge of the converted optical pulses. Parameters that affect frequency chirp, such as biased current, input optical power, extinction ratio and wavelength of input signal, and length of active region, are analyzed respectively. It provides a theoretical basis for improving the frequency chirp of converted signal.
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Changjian Ke, Changjian Ke, Bing Zhao, Bing Zhao, Deming Liu, Deming Liu, } "Theoretical investigation on frequency chirp of gain-clamped wavelength converter", Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 75141E (28 October 2009); doi: 10.1117/12.846959; https://doi.org/10.1117/12.846959

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