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Multiple wave frequency multiplication quasi phase matching photo crystal

A quasi-phase matching, photonic crystal technology, applied in optics, lasers, optical components, etc.

Inactive Publication Date: 2004-07-14
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for frequency conversion, the one-dimensional photonic crystal structure has certain limiting factors, because the incident light wave can only be incident in one direction in this structure.

Method used

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  • Multiple wave frequency multiplication quasi phase matching photo crystal
  • Multiple wave frequency multiplication quasi phase matching photo crystal
  • Multiple wave frequency multiplication quasi phase matching photo crystal

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The working temperature of the photonic crystal in this embodiment is 24.5 degrees Celsius; the photonic crystal is lithium niobate (LiNbO 3 )material.

[0022] The structure of photonic crystal is like figure 2 Shown. The superlattice point is a polarization inversion column made by a high-pressure polarization process, with a diameter of 4μm; the shape of the superlattice 7 of the photonic crystal is a triangle, and its three sides are the first side a of the superlattice. 1 , The length is 5.1μm, the second side a of the superlattice 2 , The length is 8.52μm and the first side a of the superlattice 3 , The length is 12.27μm; the shape of the reciprocal lattice 8 corresponding to the superlattice 7 is a triangle, and its three sides are the first side b of the reciprocal lattice. 1 , The second side of the inverted vector lattice b 2 And the third side of the reciprocal lattice b 3 ; The photonic crystal consists of the first incident surface 1, the second incident surfac...

Embodiment 2

[0025] The conversion efficiency of the second harmonic is:

[0026] η 2 ω = 8 π 2 d eff 2 L eff 2 I ω ϵ 0 n ω 2 n 2 ω c λ ω 2 sin c 2 ( ΔkL / 2 ) - - ( 1 ...

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Abstract

This invention relates to a multiwave multi-frequency quasi-phase matched photon crystal which is a ferroelectric crystal material, the lattice point of the triangular super crystal lattice is a polarized reverse post processed by high pressure polarization technology, the reciprocal-vector lattice corresponding the super crystal lattice is triangular, the photon crystal includes three pairs of parallel faces vertical to three edges of the reciprocal-vector lattice separately to determine size of the super crystal lattice by quasi-phase matched conditions.

Description

Invention field [0001] The invention relates to a photonic crystal, in particular to a quasi-phase matching photonic crystal of multi-wave frequency doubling. Background technique [0002] Due to the various excellent properties of photonic crystals, in recent years, it has become the focus of extensive research, especially in the second-order nonlinear effects of photonic crystals (frequency doubling, sum frequency, difference frequency and optical parametric process, etc.). In the double frequency effect in photonic crystals, due to the dispersion of the crystal, there is usually a certain phase velocity difference between the fundamental frequency and the frequency waves. The continuous phase change caused by the different phase velocities of the two light waves results in an alternating change in the direction of the energy flow, which in turn leads to the second harmonic intensity along the interaction distance L=λ f / 4(n s -n f )(Where n f And n s Are the refractive index o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/02G02F1/00H01S3/109
Inventor 马博琴倪培根程丙英张道中
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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