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391results about How to "Reduce crosstalk" patented technology

Fiber bragg grating sensing method and system based on wavelength-division multiplexing multichannel output time-domain address finding technology

The invention discloses a fiber bragg grating sensing method and system based on a wavelength-division multiplexing multichannel output time-domain address finding technology. A controlled light source is provided and outputs light wave signals which are scanned by wavelengths. The light wave signals are coupled with a coupler after being subjected to bragg reflection. Finally, the light wave signals are converted to electric pulse train signals and transmitted to a delay control switch array after being amplified, and the electric pulse train signals are distributed and output in sequence among output channels of the delay control switch array through the delay control switch array, so that time-domain address finding is realized. With the help of wavelength scanning and selective conduction of an analogue electronic switch array, a wavelength-division multiplexing signal processing technology is organically combined with the time-domain address finding technology, therefore, a demand of an optical distance interval between adjacent sensing elements in an ordinary time-domain address finding technology is converted into a demand of a wavelength interval, so that the dependence on accessing a delay optical fiber between the adjacent sensing elements is avoided.
Owner:HEFEI UNIV OF TECH

Low-loss four-port non-blocking optics router based on micro-ring resonator

The invention discloses a low-loss four-port non-blocking optics router based on micro-ring resonators. Through six cross waveguide micro-ring resonators and a parallel waveguide micro-ring resonator, an input end of a first port is coupled to an output end of a fourth port. An input end of a second port is coupled to an output end of the first port. An input end of the fourth port is coupled to an output end of a third port. The input end of the first port is coupled to the output end of the third port. An input end of the third port is coupled to an output end of the second port. The input end of the second port is coupled to the output end of the fourth port. A seventh micro-ring resonator is used for being connected with an optical channel from the fourth port to the first port and an optical channel from the second port to the third port. Due to the fact that the number of the micro-ring resonators is reduced to seven, the low-loss four-port non-blocking optics router based on the micro-ring resonators has the advantages of improving utilization efficiency of devices, simplifying the structure of a switch, decreasing area of the switch, reducing insertion loss and crosstalk of the switch due to the fact that the number of the cross waveguide micro-ring resonators is reduced to six, enhancing extendibility of the devices, being prone to establishing an on-chip optical interconnection network architecture and achieving high-speed transmission and exchange of optical signals.
Owner:ZHEJIANG UNIV
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