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High repetition rate laser pulse generation and delay time calibration method

A high repetition rate, laser pulse technology, applied to lasers, laser components, phonon exciters, etc., can solve problems such as unstable working conditions, lower laser system performance, high debugging and operation and maintenance costs, and achieve easy maintenance , low-cost effect

Inactive Publication Date: 2018-08-21
INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the repeatability of the optical pulse parameters of the laser output by the oscillating source is not good, it will affect the parameter matching of the pulse compression, frequency doubling or shaping links in the laser system built with it, and reduce the performance of the entire laser system
If the working state is unstable, it is often necessary to use high-bandwidth oscilloscopes or spectrum analyzers and other testing equipment to debug and calibrate, so the cost of debugging and operation and maintenance is very high

Method used

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  • High repetition rate laser pulse generation and delay time calibration method
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  • High repetition rate laser pulse generation and delay time calibration method

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Embodiment Construction

[0025] Embodiments of the present invention will be described below with reference to the drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.

[0026] In this embodiment, the high repetition rate laser pulse generation and delay time calibration method provided by the present invention include:

[0027] Low repetition frequency laser oscillation source generates low repetition frequency laser pulses;

[0028] A plurality of cascaded delay units divide the laser pulses input into the delay unit of the current stage into two paths, so that one path is delayed for a predetermined delay time ...

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Abstract

The invention discloses a high repetition frequency laser pulse generation and time delay calibration method, comprising the steps that a low repetition frequency laser oscillation source generates low repetition frequency laser pulses; a plurality of cascaded delay units respectively divide laser pulses input to the delay units into two paths, and one path is coupled with the other part after delaying for a predetermined delay time and is output; optical output features of the laser pulses output by each delay unit are detected by a high repetition frequency laser oscillation source and an optical self-correlation instrument, and the delay time is calibrated according to the optical output features; and the plurality of cascaded delay units output high repetition frequency laser pulses after calibration. The first level delay unit is connected with the low repetition frequency laser oscillation source, and the delay units are sequentially connected in series. It is proposed in the method that the delay times of the delay units are accurately calibrated by using a double-pulse optical self-correlation method, and high-precision high repetition frequency laser pulses are generated by the cascaded delay units.

Description

technical field [0001] The invention relates to the technical field of fiber laser oscillation sources, in particular to a high repetition frequency laser pulse generation and delay time calibration method. Background technique [0002] Each component that constitutes the optical cavity of the fiber laser oscillation source needs to have a certain length, which cannot be made into a very short cavity length, and its pulse repetition frequency is generally tens of megahertz. [0003] The high-order soliton effect can be used to form multiple pulses in the cavity, which can increase the pulse repetition frequency, but the time structure between high-order soliton pulses is not very stable, and cannot meet the strict time jitter requirements. [0004] The RF-modulated active mode-locked laser can generate a laser pulse repetition frequency of 10 GHz, but the DC bias of the waveguide modulator used in the laser often drifts, resulting in poor repeatability and stability of the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/101H01S3/11
CPCH01S3/10H01S3/1024H01S3/1112
Inventor 徐金强孙大睿
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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