Spectrum composition time distribution and time consistency measuring instrument of ultrafast super-continuum spectrum

Abstract

The invention is applicable to the technical field of ultrafast optical measurement and provides a spectrum composition time distribution and time consistency measuring instrument of ultrafast super-continuum spectrum. The measuring instrument comprises a first dichroscope, a first optical path steering component, a second optical path steering component, a second dichroscope, a first object lens, a second object lens, a short-wave pass filter, an optical fiber collection lens and a CCD fiber optic spectrometer. The first dichroscope is used for separating incident spectrum to be measured into probe laser and super-continuum spectrum. The first and second optical path steering components are used for respectively guiding the propagation directions of the separated light to the second dichroscope. The second dichroscope is used for collinear output of the incident probe laser and super-continuum spectrum. The first object lens is used for stimulating a sample to generate signal light. The signal light is outputted after collected by the second object lens and then coupled to the CCD fiber optic spectrometer by the optical fiber collection lens for measurement after background light is filtered out by the short-wave pass filter. The measuring instrument provided by the invention has a simple structure and is easy to regulate, and acquired data are easy to process.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, in particular to an instrument for measuring the time distribution and time consistency of each spectral component of an ultrafast supercontinuum. Background technique [0002] figure 1 It is a schematic diagram of the X-Frog time distribution measurement instrument related to cross frequency domain, which includes devices: plane mirrors 101-110, concave mirror 111, sum frequency crystal 112 and CCD spectrometer 113, wherein the sum frequency crystal 112 is placed in a On the electric control motor that swings automatically; during the measurement, the probe light and the supercontinuum light are respectively sent to the measuring instrument in a non-collinear way, and the two light pulses are respectively reflected by a series of plane mirrors, and then passed through the same The concave mirror 111 reflects, and then the reflected probe light and supercontinuum light pass through t...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the above-mentioned time distribution measuring instrument are: 1. Using non-collinear input, it is troublesome to adjust; 2. An iterative algorithm is used in the measurement, and the solution process is relatively complicated; 3. The sum frequency crystal needs to meet the phase matching conditions; in addition, the spectrometer No filter was set before, there will be some background interference

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