KEYWORDS: Orthogonal frequency division multiplexing, Modulation, Signal generators, Modulators, Signal detection, Interference (communication), Semiconductor optical amplifiers, Multiplexers, Extremely high frequency, Signal attenuation
A scheme of photonic orthogonal frequency division multiplexing (OFDM) signal generation and distribution employing copolarized pumps generated by a dual driver Mach-Zehnder modulator and four-wave mixing inside an optical semiconductor amplifier (SOA) is proposed and evaluated by theoretical analysis and simulations. In this proposal, 12 times optical frequency multiplication is utilized to up-convert the intermediate frequency band OFDM signal to the millimeter wave (mm-wave) band. The system performance under various key parameters of the SOA and the input optical signal is evaluated and discussed. The results present useful insight for the practicality of photonic mm-wave signal generation and distribution in the next-generation optical-wireless access network.
Photonic millimeter wave (mm-wave) signal generation employing a differential Mach-Zehnder modulator (DMZM) and a semiconductor optical amplifier (SOA) is proposed and evaluated by theoretical analysis and simulation. This paper presents the theoretical study of the generation of a co-polarized and phase-locked dual-pump for four-wave mixing and optical mm-wave signal, the propagation of the optical mm-wave signal in single mode fiber, and the coherent demodulation of the electrical mm-wave signal at the base station. Performance analysis and optimization design of the proposed scheme are conducted via simulations. The generation of mm-wave signals at 30, 40, and 60 GHz is simulated and analyzed. The influence of SOA and the input optical signal on the mm-wave generation and transmission is investigated. Simulation results present useful insight for the practicality of photonic mm-wave signal generation and distribution in the next-generation access network.
Photonic millimeter wave (mm-wave) signal generation employing a differential Mach-Zehnder modulator (DMZM) and
a semiconductor optical amplifier (SOA) is proposed and evaluated by simulations. Optimization design and
performance analysis of the scheme are conducted via simulations. This paper presents the theoretical study of the
generation of copolarized dual-pump with locked phase and optical mm-wave signal, the propagation of the optical mm-wave
signal in single mode fiber (SMF). The effect of SOA and the input optical signal on the mm-wave generation and
transmission is investigated by means simulations. Simulation results present useful insights for the practicality of
photonic mm-wave signal generation and distribution in the next-generation access network.
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.
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.
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.
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