KEYWORDS: Upconversion, Modulation, Four wave mixing, Semiconductor optical amplifiers, Frequency conversion, Radio optics, Optical engineering, Extremely high frequency, Radio over Fiber, Transparency
A novel scheme of photonic frequency conversion based on two-pump four-wave mixing in a semiconductor optical amplifier is proposed. Characterized by its wide conversion range, the proposed scheme has the potential to generate millimeter waves at much higher frequency and convert several signal channels simultaneously. The system performance is analyzed through a numerical model, and the effect of the pump-signal pulse parameters on the conversion efficiency is discussed.
Proposed in this paper is a high efficient 160Gb/s all-optical wavelength converter based on terahertz optical asymmetric demultiplexer with quantum dot Semiconductor optical amplifier (QDSOA -TOAD). The performance of the wavelength converter under various operating conditions, such as different injected current densities, input pulse widths and input control pulse energies, is analyzed in terms of contrast ratio (CR) through numerical simulations. With the properly chosen parameters, a
wavelength-converted signal with CR over 19.48 can be obtained.
Introduced in this paper is an experimental system of packet-level self-synchronization using semiconductor optical
amplifier based Mach-Zehnder interferometer (SOA-MZI). The function of SOA-MZI in the system is analyzed, as well
as the relationship among key parameters of various components. A tunable optical delay line is used for the adjustment
of phase difference. It reveals that SOA-MZI is an effective way to extract self-synchronization clock in both
experiments and practical applications.
In this paper, a novel scheme utilizing the dual-pump FWM in SOA is proposed for the frequency up-conversion and the generation of
mm-wave. Characterized by its large conversion range, the proposed scheme has the potential to generate mm-wave at much higher frequency and to convert several signal channels simultaneously. Performance of the system is analyzed through a numerical model and the impact of the pumps power on the conversion efficiency is discussed.
Based on rate equations for carrier density in the active region of the QDSOA, the performance of a XOR gate using a quantum-dot semiconductor optical amplifier- based Mach-Zehnder interferometer (QDSOA-MZI) is analyzed in terms of Q factor through numerical simulations. The control pulse energy, the pulse width and the carrier capture time from the wetting layer into the dots are examined, which prove to be relevant to the Q factor. Our numerical results show that at 160Gb/s a high quality output signal with a Q factor over 5.9dB can be achieved.
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