公开(公告)号：US20200378835A1

公开(公告)日：2020-12-03

申请号：US16576399

申请日：2019-09-19

Applicant: Xi'an Institute of Optics and Precision Mechanics of CAS

Inventor： Qibing SUN ,  Chao ZENG ,  Leiran WANG ,  Wenfu ZHANG ,  Wei ZHAO

IPC: G01J11/00 ,  H04L27/26

Abstract: The present disclosure belongs to the field of optical measurement, and relates to a high-resolution real-time time-frequency domain measuring device and method for an ultra-short pulse. The technical problem of how to realize high-resolution real-time measurement of time-frequency domain information of the ultra-short pulse and improve the accuracy and reliability of a measurement result is solved. The measuring device includes a light splitting unit used to split signal light to be measured, a time lens unit used to perform time domain amplification on the signal light to be measured, a dispersion Fourier transform unit used to perform Fourier transform on the signal light to be measured, and a detection unit used to receive and detect measured data. The present disclosure uses the time lens and the dispersion Fourier transform technology to realize the real-time measurement of sub-picosecond transient characteristics of the ultra-short pulse to accurately obtain the time-frequency domain information of the ultra-short pulse, thereby breaking through the capacity limitation to the bandwidth of a traditional oscilloscope, the measuring speed of a spectrometer and the like, and the present disclosure is suitable for femtosecond-grade ultra-short pulses.

公开(公告)号：US20170254751A1

公开(公告)日：2017-09-07

申请号：US15071988

申请日：2016-03-16

Applicant: Xi'an Institute of Optics and Precision Mechanics of CAS

Inventor： Wenfu ZHANG ,  Guoxi WANG ,  Lingxuan ZHANG ,  Wei ZHAO

IPC: G01N21/552

CPC classification number: G01N21/554 ,  B82Y20/00

Abstract: The invention relates to a metamaterial nano-sensing system, and in particular to a high-sensitivity metamaterial nano-sensing system with an ultra-narrow line width spectral response. The system includes an input light path, a metamaterial nano-sensing unit and an output light path which are sequentially provided along a direction of a light path, and the metamaterial nano-sensing unit includes a Bragg grating and a metallic periodic array arranged above the Bragg grating. The nano-sensing system provided by the invention has an ultra-narrow line width spectral response, so that sensitivity of a nanosensor is effectively improved, and broad application prospect in the fields of portable biosensing, drug development and detection, environment monitoring and the like is ensured.