A mechanism is proposed for the formation of a narrow nonlinear layer deep under the anode in thermally poled fibers, based on a two-rate H+ migration mechanism. Simulations agree second harmonic microscopy measuremen...
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A low-sidelobe substrate integrated waveguide (SIW) leaky wave antenna (LWA) array with non-uniform transverse slots is proposed. By tuning the length of the radiating slot etched on the SIW, the sidelobe level of the...
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A low-sidelobe substrate integrated waveguide (SIW) leaky wave antenna (LWA) array with non-uniform transverse slots is proposed. By tuning the length of the radiating slot etched on the SIW, the sidelobe level of the design can be effectively reduced. A four-way SIW power divider with equal outputs of same phase and amplitude is designed to feed a four by one array. The proposed LWA array shows a low sidelobe level up to -28.4 dB and can scan within an angular range of 36° with frequency varying from 2.2 GHz to 3.0 GHz.
A novel linear cavity erbium-doped fiber (EDF) laser based on a structured chirped fiber Bragg grating (CFBG) filter is proposed for stable single-polarization (SP) single-longitudinal-mode (SLM) operation. For the fi...
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We investigate optimal twin-hole poling optical fiber configurations, including distances between core and each electrode, and poling voltage based on the two-dimensional charge dynamics model. We propose a poled fibe...
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We investigate optimal twin-hole poling optical fiber configurations, including distances between core and each electrode, and poling voltage based on the two-dimensional charge dynamics model. We propose a poled fiber with optimized x^（2） as well as single-polarization property. Small distance between core and anode guarantees the poled fiber with large x^（2） in fiber core and large polarization-dependent loss. A maximum x^（2） in the core region either outside or inside nonlinear layer can be realized by appropriately selecting edge-to-edge distance between core and cathode. The maximum x^（2） in the core region can be even larger by increasing the poling voltage.
An approach to reducing the harmonic distortion in frequency-doubled triangular-shaped pulse train generation is proposed. It requires a dual-parallel Mach Zehnder modulator followed by a section of dispersive fiber, ...
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An approach to reducing the harmonic distortion in frequency-doubled triangular-shaped pulse train generation is proposed. It requires a dual-parallel Mach Zehnder modulator followed by a section of dispersive fiber, as the key component. The basic principle is to make the expression of optical intensity approximately equal to the Fourier expansion of idea triangular-shaped waveform. A detailed expression of the final optical intensity is given by theory and then verified by simulation. It is found that the impact of the undesired harmonic distortion is greatlv reduced.
A two-dimensional multi-charge dynamics model is proposed in this paper to investigate the time evolution of electric field distribution during thermal poling in twin-hole optical fiber. The model is validated by comp...
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A universal scaling law to describe dispersion relation of plasmon modes in graphenecoated nanowire (GNW) is presented, which could be applied to obtain the dispersion relation of GNW with any radius without further e...
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We present a theoretical investigation on thermal poling of double-anode optical fiber. It is found that an optimized asymmetrical double-anode provides larger χ(2), while the symmetrical configuration lead to zero ...
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This paper firstly demonstrated the refractive index (RI) characteristics of a singlemode-claddingless-singlemode fiber structure filter based fiber ring cavity laser sensing system. The experiment shows that the lasi...
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