MgO:PPLN-based electric field tuning light parameter oscillator with controllable crystal domain duty ratio

Abstract

An MgO:PPLN-based electric field tuning light parameter oscillator with a controllable crystal domain duty ratio belongs to the field of solid laser. The electric field tuning light parameter oscillator settles the following problems in an existing optical parameter oscillator: limitation by a single crystal domain duty ratio and incapability of being switched between high-precision wide tuning and high frequency conversion efficiency. According to the MgO:PPLN-based electric field tuning light parameter oscillator, an isolator performs return light isolation of pump light which is generated by a laser pump source; two flat concave lenses form a confocal optical parameter oscillation chamber; after pump light is focused by a focusing coupling system, the pump is arranged at an MgO:PPLN crystal at the common focus in the chamber; The crystal has a polarized period positive and negative crystal domain diagonal segmented structure. A driving power supply exerts a voltage on the crystal. An electric controlled precise translation platform is made to move through a computer. The crystal domain duty ratio is changed through transversely moving a light inputting position where the crystal is located. According to the MgO:PPLN-based electric field tuning light parameter oscillator, the MgO:PPLN crystal with controllable crystal domain duty ratio is used as a frequency conversion medium; and free switching between high-precision wide tuning and high frequency conversion efficiency is realized according to an actual requirement.

Description

technical field [0001] The invention belongs to the technical field of solid-state lasers, and in particular relates to an electric-field-tuned optical parametric oscillator based on MgO:PPLN crystal domains with controllable duty ratios. Background technique [0002] Optical parametric oscillation technology is an effective way to produce broadband tunable coherent laser light sources. The optical parametric oscillator (OPO) based on this technology has the advantages of wide tuning range, flexible and diverse tuning methods, and easy full curing of the whole machine. It is used in military, It is widely used in medical, communication and other fields, and it is an important research direction and research hotspot in the field of laser nonlinear frequency conversion in recent years. [0003] Spectrum tuning performance is one of the important indicators to measure the optical parametric oscillator. At present, optical parametric oscillators use different tuning methods acc...

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Problems solved by technology

[0005] In order to solve the difficult problem existing in the existing optical parametric oscillator that is limited to a single crystal domain duty cycle and cannot be flexibly switched between high-precision wide tuning and high frequency conversion efficiency, the present invention provides a crystal domain duty cycle The MgO:PPLN crystal that can be externally adjusted is the frequency conversion medium, and the electric field-tuned optical parametric oscillator based on the controllable duty ratio of the MgO:PPLN crystal domain can be realized by applying a voltage to it.

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