High-repetition frequency ultrafast laser pulse train generating device and control method thereof

A high repetition rate, laser pulse technology, applied in the field of femtosecond lasers, can solve the problems of difficulty in obtaining MHz repetition frequency at the same time, difficult to obtain high energy, and the average power of laser pulse cannot be increased infinitely.

Active Publication Date: 2019-04-09
上海镱镭飞秒激光技术有限公司
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the thermal effect, the average laser pulse power cannot be increased infinitely
When the laser outputs high energy, the repetition rate must be sacrificed, and it is difficult to obtain high energy in order to obtain a high repetition rate
In the current laser technology, the oscillator can output laser on the order of tens of MHz, but the energy is usually on the order of ten nJ, and the amplifier can obtain higher energy, but the highest repetition rate is on the order of hundreds of KHz.
Due to the bottleneck of thermal effects, it is difficult to obtain MHz repetition frequency and laser pulses of tens of uJ at the same time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-repetition frequency ultrafast laser pulse train generating device and control method thereof
  • High-repetition frequency ultrafast laser pulse train generating device and control method thereof
  • High-repetition frequency ultrafast laser pulse train generating device and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 1 As shown, this embodiment adopts a linear resonant cavity, and the high repetition rate ultrafast laser pulse train generating device includes: a millijoule laser pulse amplification system, a repetition rate conversion system, a linear resonant cavity, a polarizer, a Pockels cell, a quarter A wave plate and energy supply device; Wherein, energy supply device comprises gain crystal 24 and pumping source 26, and pumping source 26 is connected to gain crystal 24; Linear resonator is made of relative end mirror 21 and output mirror 27, and end mirror 21 is a high reflection mirror, and the output mirror 27 is a partially reflective and partially transmissive mirror; in the linear cavity, a quarter wave plate 28, a Pockels cell 22, a polarizer 23 and a gain are placed sequentially from the end mirror 21 to the output mirror 27 Crystal 24; the millijoule laser pulse amplification system outputs low-frequency and low-energy laser pulses, and the repetition rate ...

Embodiment 2

[0042] like image 3 As shown, the present embodiment adopts a ring resonator, and the high repetition rate ultrafast laser pulse train generation device includes: a millijoule laser pulse amplification system, a repetition rate conversion system, a ring resonator, an input polarizer 36, an output polarizer 38, a general Kerr cell 22, half-wave plate 37 and energy supply device; Wherein, energy supply device comprises gain crystal 24 and pumping source 26, and pumping source 26 is connected to gain crystal 24; 31 to 34, wherein the first, third and fourth mirrors 31, 33 and 34 are cavity mirrors using high reflection mirrors, and the second mirror 32 is an output mirror using a partially transmissive partial mirror; in the ring resonant cavity from The output polarizer 38, the half-wave plate 37, the Pockels cell 22 and the input polarizer 36 are placed in sequence from the first reflector to the second reflector, and the gain crystal 24 is placed between the third reflector a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses a high-repetition frequency ultrafast laser pulse train generating device and a control method thereof. The method disclosed by the present invention is characterized in that: a linear resonant cavity or a ring resonant cavity is used, one mirror of which is a partially transmissive mirror and is taken as an output mirror, each time a pulsed laser is output to the output mirror, an output pulse will be output to form an output pulse train, and the number of output pulse trains that satisfy the requirement is obtained by controlling the high-voltage duration of the Pockels cell; by controlling the gain of the laser pulse by using an energy supply device in the resonant cavity, the energy of the output pulse train that satisfies the requirement is obtained; and the high-repetition frequency output pulse train is a double-structured pulse train containing high-repetition rate sub-pulse trains in a low-repetition frequency pulse envelope, wherein the repetition frequency of the pulse envelope is determined by a repetition frequency conversion system, and the repetition frequency of the sub-pulse in each pulse envelope is determined by the length of the ring resonant cavity.

Description

technical field [0001] The invention relates to femtosecond laser technology, in particular to a high repetition rate ultrafast laser pulse train generating device and a control method thereof. Background technique [0002] The average laser pulse power is the product of single pulse energy and repetition rate. Considering thermal effects, the average power of laser pulses cannot be increased infinitely. When the laser outputs high energy, the repetition rate must be sacrificed, and it is difficult to obtain high energy to obtain a high repetition rate. In the current laser technology, the oscillator can output laser on the order of tens of MHz, but the energy is usually on the order of ten nJ, and the amplifier can obtain higher energy, but the highest repetition rate is on the order of hundreds of KHz. Due to the bottleneck of thermal effects, it is difficult to obtain laser pulses with MHz repetition frequency and tens of uJ at the same time. However, in practical appl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/081H01S3/083H01S3/086H01S3/10H01S3/107
CPCH01S3/08H01S3/08059H01S3/0816H01S3/083H01S3/086H01S3/10061H01S3/107
Inventor 刘成王睿
Owner 上海镱镭飞秒激光技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap