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Method for dynamically regulating and controlling laser mode based on thermo-optic effect

A thermo-optic effect and dynamic technology, applied in the direction of excitation methods/devices, lasers, laser components, etc., can solve the problems of difficult operation of optical integration, and achieve the effect of easy integration and high control precision

Pending Publication Date: 2021-08-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it seems that the strain loading method can only work in specific systems (such as micro-electromechanical, nano-electromechanical, etc.), and it may be difficult to operate for optical integration.

Method used

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  • Method for dynamically regulating and controlling laser mode based on thermo-optic effect
  • Method for dynamically regulating and controlling laser mode based on thermo-optic effect
  • Method for dynamically regulating and controlling laser mode based on thermo-optic effect

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preparation example Construction

[0037] The gallium-doped zinc oxide microrods used in the present invention can be purchased commercially or obtained by self-synthesis. Wherein, the preparation method of gallium-doped zinc oxide microrods specifically includes the following steps:

[0038] S1. Weigh zinc oxide powder, graphite powder and gallium oxide powder according to the mass ratio of 1:1:0-0.5, mix them and grind them thoroughly, and use the ground mixture as a reaction source;

[0039] S2. Clean and dry the silicon wafer as the substrate, and cover the polished surface as the growth surface on the quartz boat equipped with the reaction source and not in contact with the reaction source;

[0040] S3. Put the quartz boat equipped with the reaction source and the silicon substrate into the quartz tube with openings at both ends, and place the whole in the high temperature zone of the tube furnace for reaction, and the reaction temperature is 1100-1200°C;

[0041] S4. Introduce argon and oxygen into the t...

Embodiment 1

[0043] In this embodiment, the method for dynamically regulating the laser mode based on the thermo-optic effect includes the following steps:

[0044] (1) Select a single microrod with a length of 0.5cm and a diameter of 10μm with a gallium-doped content of 0.2% zinc oxide and place it on an insulating silicon dioxide substrate with a length and width of 1cm×1cm; the two ends of the microrod are pressed with indium particles As an electrode, the electrode spacing is 500 μm;

[0045] (2) Place the prepared device on a three-dimensional translation stage with a precision of 1 μm and a progress of 5 cm, adjust the translation stage, and pass through an optical microscope with an objective lens of 10 magnification and an eyepiece of 10 magnification. The excitation wavelength is 325 nm, and the repetition frequency is 1000 Hz. , the pump light with a pulse width of 100 fs is focused on gallium-doped zinc oxide microrods for optical excitation, and the optical signal of zinc oxide...

Embodiment 2

[0050] In this embodiment, the method for dynamically regulating the laser mode based on the thermo-optic effect includes the following steps:

[0051](1) Select a single microrod with a length of 0.8cm and a diameter of 5μm and a zinc oxide doped content of 0.2% with gallium, and place it on an insulating silicon dioxide substrate with a length and width of 1cm×1cm; press the two ends of the microrod with indium particles As an electrode, the electrode spacing is 600 μm;

[0052] (2) Place the prepared device on a three-dimensional translation stage with a precision of 2 μm and a process of 3 cm, adjust the translation stage, and pass through an optical microscope with an objective lens of 10 magnification and an eyepiece of 10 magnification, and the excitation wavelength is 355 nm, and the repetition frequency is 2000 Hz , the pump light with a pulse width of 100 fs is focused on gallium-doped zinc oxide microrods for optical excitation, and the optical signal of zinc oxide ...

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Abstract

The invention discloses a method for dynamically regulating and controlling a laser mode based on a thermo-optic effect. The method comprises the following steps of placing a gallium-doped zinc oxide microrod on an insulating substrate, and preparing electrodes at the two ends of the gallium-doped zinc oxide microrod; focusing a pump light source on the zinc oxide microrod for optical excitation, and collecting an optical signal of the gallium-doped zinc oxide microrod; applying a voltage to the gallium-doped zinc oxide microrod by using a direct-current power supply, and observing an injection current; meanwhile, carrying out optical pumping, collecting the optical signals after electrification in real time, and comparing and analyzing the spectral signals before and after electrification. According to the invention, Joule heat generated during electric injection is utilized to realize the laser mode dynamic regulation and control of a ZnO microcavity. Compared with a traditional environment thermal control mode, the electric injection mode has the advantages of being more flexible in operation, fast in heating, high in accuracy and the like. The working mode of electronic temperature control lays a solid foundation for the practicability and integration of a tunable laser.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and relates to a method for dynamically adjusting and controlling a laser mode based on a thermo-optic effect. Background technique [0002] Laser is a great invention of the 20th century. Since its advent, it has had a huge impact on the fields of national defense, processing, communication and life sciences. The development of laser technology has therefore attracted extensive attention from researchers all over the world, especially the design and construction of new lasers with dynamically adjustable wavelengths. At present, the control methods of laser wavelength include distributed feedback, distributed Bragg reflection, self-absorption effect, energy band engineering, etc. However, these methods can only be pre-designed. Once fixed, the laser emission wavelength is also fixed, and cannot be dynamically and reversibly regulated on the wavelength. In recent years, the patent applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/10H01S5/065H01S5/30H01S5/04
CPCH01S5/041H01S5/0651H01S5/1042H01S5/3018
Inventor 卢俊峰姜明明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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