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Vector beam amplifying and generating apparatus having polarization independent optical parametric amplification characteristics

An optical parametric amplification and polarization technology, which is applied in the field of optoelectronics, can solve the problems of difficulty in amplifying vector beams and difficulty in generating vector beams, and achieves the effect of a simple production process.

Active Publication Date: 2012-11-07
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the same amplification ability for any polarized signal light, which solves the problems of difficult amplification of vector beams and difficult generation of special waveband vector beams. The device is compact in structure, easy to integrate, strong in practicability, and has outstanding application prospects

Method used

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  • Vector beam amplifying and generating apparatus having polarization independent optical parametric amplification characteristics
  • Vector beam amplifying and generating apparatus having polarization independent optical parametric amplification characteristics
  • Vector beam amplifying and generating apparatus having polarization independent optical parametric amplification characteristics

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Set the wavelength of the signal light to 810nm, and the light intensity to 1W / cm 2 , the pump light wavelength is 532nm, and the light intensity is 10MW / cm 2 . According to the quasi-phase matching condition, the reciprocal lattice vector provided by the periodic structure of the first and fourth parts is used to compensate the wave vector mismatch of the frequency up-conversion, and the length of each cycle is set l 1 =7.45μm; the reciprocal lattice vector provided by the periodic structure in the second part is used to compensate the wavevector mismatch of the polarization coupling of the signal light, and the period length l 2 =9.88μm; the reciprocal lattice vector provided by the periodic structure in the third part is used to compensate the wavevector mismatch of the idler frequency optical polarization coupling, and the period length l 3 =20.48 μm. In order to amplify the signal light energy, set the number of cycles N 1 =1000, the length of the lithium nioba...

Embodiment 2

[0047] Set the wavelength of the signal light to 810nm, and the light intensity to 1W / cm 2 , the pump light wavelength is 532nm, and the light intensity is 10MW / cm 2 . According to the quasi-phase matching condition, the reciprocal lattice vector provided by the periodic structure of the first and fourth parts is used to compensate the wave vector mismatch of the frequency up-conversion, and the period length l is set 1 =7.45μm; the reciprocal lattice vector provided by the periodic structure in the second part is used to compensate the wavevector mismatch of the polarization coupling of the signal light, and the period length l 2 =9.88μm; the reciprocal lattice vector provided by the periodic structure in the third part is used to compensate the wavevector mismatch of the idler frequency optical polarization coupling, and the period length l 3 =20.48 μm. In order to amplify the signal light energy, set the number of cycles N 1 =1000, the length of the lithium niobate opti...

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Abstract

The invention discloses a vector beam amplifying and generating apparatus having polarization independent optical parametric amplification characteristics, which comprises lithium niobate crystal (PPLN) or potassium niobate which is polarized according to different periods and divided into four parts, wherein optical parametric amplification of the first part and the fourth part cabn be realized, idle frequency light can be generated, and phase mismatch among a pump light, a signal light and an idle frequency light is compensated by means of a reciprocal lattice vector provided by a periodic polar structure; in the second part, the wave vector mismatch in which the signal light is polarized and coupled by means of the reciprocal lattice vector of the periodic polar structure can be compensated; the reciprocal lattice vector in the third part is designed to satisfy an electro-optic deflection reference matching process of the idle frequency light, the wave vector mismatch in which the idle frequency light is polarized and coupled can be compensated, the second part and the third part in the middle of the niobate crystal (PPLN) or the potassium niobate having different periodic polarity realize the periodic modulation of the electro-optical coefficients with an external DC (Direct Current) power supply on a y-surface perpendicular to a light propagation direction. The invention has wide application prospect in the all-optical switching and optical communication field.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to the electro-optical interaction and optical parametric amplification in periodically poled lithium niobate (PPLN) superlattice, and a novel polarization-independent optical parametric amplification based on these two effects Vector beam amplification and generation devices. Specifically, it is a device that rotates the polarization direction of the corresponding light wave and amplifies the energy by combining the electro-optical effect and optical parametric amplification, and finally realizes the optical parametric amplification of signal light with any polarization, which can be used to solve complex polarization states. Magnification problems such as vector beams, etc. Background technique [0002] Periodically poled lithium niobate (PPLN) has been widely used in nonlinear optics, electro-optical effect (EO), piezoelectric effect and other fields. Due to its periodi...

Claims

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Application Information

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IPC IPC(8): G02F1/39
Inventor 陆延青邵光灏宋晓诗徐飞胡伟
Owner NANJING UNIV
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