System and method for matching echo wall cavity phases
A matching method and whispering gallery technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as non-uniqueness of reciprocal vectors and inability to maximize the intensity of reciprocal vectors, so as to avoid the loss of nonlinear coefficients and eliminate clutter Astigmatism, the effect of reducing complexity
Active Publication Date: 2019-09-20
NANJING NANZHI INST OF ADVANCED OPTOELECTRONIC INTEGRATION NANJING
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[0006] This application provides a whispering gallery cavity phase matching system and method to solve the problem that the traditional system cannot maximize the strength of the reciprocal vector, and at the same time, the reciprocal vector does not have uniqueness
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[0053] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.
[0054] In the technical solution provided by the present application, the reciprocal lattice vector, that is, the reciprocal lattice vector, is a professional term in solid state physics and is used to describe the lattice momentum of phonons and electrons. It is usually defined as the reciprocal vector perpendicular to the crystal plane of the normal lattice space, and the length is equal to 2π times the reciprocal interplanar s...
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The invention provides a system and a method for matching echo wall cavity phases. By adopting the periodicity of an echo wall microcavity itself, the domain inversion of the echo wall microcavity is divided into two semicircles, and the maximum nonlinear coefficient of a material is determined according to the reciprocal lattice vector intensity and the quantity obtained by verification and calculation through the echo wall cavity structure opposite to the domain inversion direction. By providing the echo wall cavity matching system, the maximum nonlinear coefficient can be obtained to avoid the nonlinear coefficient loss caused by a domain structure, obtain the unique inverted lattice vector, enable the output wavelength to be unique, and eliminate stray light generated by other inverted lattice vectors. The oscillator does not need to prepare a periodic structure in the polarization process, and the complexity of the polarization process is reduced.
Description
technical field [0001] The present application relates to the technical field of optical parametric oscillators, in particular to a whispering gallery cavity phase matching system and method. Background technique [0002] An Optical Parametric Oscillator (OPO) is a parametric oscillator that oscillates at an optical frequency. It converts the input pump light into two output lights with lower frequency through the second-order nonlinear optical interaction, that is, signal light and idler light. The mode volume of the whispering gallery optical microcavity is small, the quality factor is high, and the interaction between light and matter can be greatly enhanced; and the whispering gallery optical microcavity is well integrated, which is considered to have great application prospects in the field of integrated optical devices. [0003] Whispering gallery cavity is generally made of materials with high refractive index, such as polydimethylsiloxane, glass, etc. It mainly uses...
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Login to View More IPC IPC(8): G02F1/35
CPCG02F1/3544G02F1/3548
Inventor 尹志军吴冰许志城
Owner NANJING NANZHI INST OF ADVANCED OPTOELECTRONIC INTEGRATION NANJING