We propose a novel optical intensity modulator based on the combination of a symmetrical metal cladding optical waveguide （SMCW） and ferrofluid, where the ferrofluid is sealed in the waveguide to act as a guiding la...
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We propose a novel optical intensity modulator based on the combination of a symmetrical metal cladding optical waveguide （SMCW） and ferrofluid, where the ferrofluid is sealed in the waveguide to act as a guiding layer. The light matter interaction in the ferrofluid film leads to the formation of a regular nanoparticle pattern, which changes the phase match condition of the ultrahigh order modes in return. When two lasers are incident on the same spot of the waveguide chip, experiments illustrate all-optical modulation of one laser beam by adjusting the intensity of the other laser. A possible theoretical explanation may be due to the optical trapping and Soret effect since the phenomenon is considerable only when the control laser is effectively coupled into the waveguide.
We propose a narrowband rectangular optical filter based on stimulated Brillouin scattering with flexible bandwidth and ~1-dB passband ripple. Only small performance penalty is observed when employing the filter into ...
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In this paper, we improve the almost blind phase noise suppression method proposed in our recent work and the numerical results show that the system performance can be improved greatly even when severe phase noise exi...
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ISBN:
(纸本)9781479950485
In this paper, we improve the almost blind phase noise suppression method proposed in our recent work and the numerical results show that the system performance can be improved greatly even when severe phase noise exists.
A low-complexity and single-stage carrier phase recovery algorithm is presented for 16 quadrature-amplitude-modulation coherent optical transmission systems. It is shown that the algorithm achieves better performance ...
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We present a novel microwave photonic down-conversion system based on a wideband tunable optoelectronic oscillator. Microwave signals from 14.8 to 31.0 GHz are down-converted to 1 GHz successfully. The conversion gain...
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A wideband tunable optoelectronic oscillator (OEO) based on stimulated Brillouin scattering is presented in this paper. Microwave signals generation range from 10.98 GHz to 39.98 GHz is demonstrated successfully in ou...
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We demonstrate experimentally the population inversion between 7S1/2 and 6P3/2 levels of cesium in thermal cesium cell with a 455.5 nm pumping *** calculate the relative population probabilities at each level theoreti...
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We demonstrate experimentally the population inversion between 7S1/2 and 6P3/2 levels of cesium in thermal cesium cell with a 455.5 nm pumping *** calculate the relative population probabilities at each level theoretically with the density matrix *** a steady state,5.8% atoms are at 7S1/2 level and 2.9% at 6P3/2 level,which builds up the population inversion between the two *** obtain the fluorescence spectra produced in thermal cesium cell in our *** measured relative intensity of each available fluorescence spectral line in the experiment agrees very well with the theoretical *** demonstrated population inversion between 7S1/2 and 6P3/2 levels can be used to construct an active optical clock of four-level system with a wavelength of 1469.9 nm.
We report the design and fabrication of tapered photonic crystal fibers for efficient fceo detection and ultra-flat visible super-continuum generation, which are used in an astro-comb system.
ISBN:
(纸本)9781479950485
We report the design and fabrication of tapered photonic crystal fibers for efficient fceo detection and ultra-flat visible super-continuum generation, which are used in an astro-comb system.
Recent patents and progress on all-optical binary pattern recognition using the passive correlator and all-optical logic gates have been reviewed. The correlator is relative simpler and easy to be implemented, however...
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Active optical clock,a new conception of atomic clock,has been proposed *** this work,we propose a scheme of active optical clock based on four-level quantum *** final accuracy and stability of two-level quantum syste...
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Active optical clock,a new conception of atomic clock,has been proposed *** this work,we propose a scheme of active optical clock based on four-level quantum *** final accuracy and stability of two-level quantum system are limited by second-order Doppler shift of thermal atomic *** three-level quantum system,they are mainly limited by light shift of pumping laser *** limitations can be avoided effectively by applying the scheme proposed *** atom four-level quantum system,as a typical example,is *** population inversion between 6S 1/2 and 5P 3/2 states can be built up at a time scale of 10-6 *** the mechanism of active optical clock,in which the cavity mode linewidth is much wider than that of the laser gain profile,it can output a laser with quantum-limited linewidth narrower than 1 Hz in *** experimental configuration is designed to realize this active optical clock.
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