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The intensity jitter of each line in an optical frequency comb (OFC) based on cascaded intensity and phase modulation is theoretically investigated when the phase noise due to the linewidth of the laser and the RF signal exists. The influences of the two kinds of linewidth on the stability of the OFC are verified by simulation.
We demonstrate in-line nonlinearity compensation (NLC) of a 5-channel dual-polarization 16-QAM signal using opto-electronic sub-systems called total intensity-directed phase modulators (TID-PMs). NLC using a TID-PM placed before each span in an 800 km link improves the signal quality, Q, of the center channel by 0.4 dB at the optimum launch power.
In this paper, we propose and demonstrate the photonic generation of phase-switchable ASK microwave signal using the orthogonal polarization modes of the optical phase modulator. The two-phase switching operation of the generated microwave signals was experimentally confirmed.
A time-lens based generator capable of providing low-duty-cycle Gaussian pulses on wavelengths twice the number of the incident CW lasers is proposed. 25-GHz 3.9-ps nearly transform-limited Gaussian pulses on three wavelengths are experimentally achieved.
We have proposed a new optical single-sideband (SSB) modulator operating in the millimeter-wave frequency band. Utilizing array-antenna-electrode and polarization-reversed structures with an asymmetric Mach-Zehnder optical waveguide, SSB modulation by wireless millimeter-wave signal can be obtained without an external power supply. SSB modulation characteristics were successfully demonstrated in the...
We propose a novel structure of optoelectronic oscillator (OEO) based on a microwave photonics filter (MPF), and this MPF is implemented by phase modulation to intensity modulation conversion and a heterogeneous multicore fiber. In our scheme, the periodicity of the generated finite impulse response (FIR) filter by using the multicore fiber is broken by the phase modulation to intensity modulation...
We present a microwave photonic filter with variable selectivity and shape by using SBS and dispersion-induced phase mismatching in optical fiber. The selectivity and shape can be adjusted by tuning the pump power, polarization state and link dispersion.
We propose a novel THz wave phase control system consisting of an optical device whose chromatic dispersion changes the phase difference between two lightwaves for photomixing. Our devised Mach-Zehnder modulation technique reveals the feasibility of full-range THz wave phase control with the semiconductor phase modulator.
We present a simple method to measure phase curve for reflective type Liquid Crystal on Silicon — Spatial Light Modulator (LCoS-SLM) in off-axis system. We also speed up the response time of "thick' LCoS-SLM by choosing appropriate driving voltage range. Based on the innovation method, the performance of LCoS-SLM could be improved in off-axis system.
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