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Ultrafast pulse laser system utilizing intensity pulse shape correction

A pulsed laser, laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problem of not directly correcting the spectral intensity distribution

Active Publication Date: 2019-01-04
IPG PHOTONICS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technique does not directly correct the spectral intensity distribution to achieve a smooth parabolic spectral shape

Method used

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  • Ultrafast pulse laser system utilizing intensity pulse shape correction
  • Ultrafast pulse laser system utilizing intensity pulse shape correction
  • Ultrafast pulse laser system utilizing intensity pulse shape correction

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Embodiment Construction

[0036] Reference will now be made in detail to the embodiments of the invention. Where possible, the same or similar reference numerals are used in the drawings and the description to indicate the same or similar components or steps. The drawings are in simplified form and are not drawn to precise scale. The term "coupled" and similar terms do not necessarily denote direct and immediate connections, but also include connections through intermediate elements or devices.

[0037] Figure 7-Figure 11 The inventive ultrafast pulsed fiber laser system 10 shown in is configured with a pulsed source 12, such as a mode-locked or gain-switched laser, that produces signal light 14 in trains of ultrashort sub-ns pulses of signal light. The pulse 14 , which may or may not have acquired some chirp after the pulse source 12 , is subjected to linear chirping in a pulse stretcher 16 to output a chirped pulse with a spectral shape 18 . Given by way of example only, pulse durations may be in...

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Abstract

An ultrafast pulse fiber laser system is configured with scalable output power and operative to reduce degradation of pulse integrity. The disclosed laser system is configured to suppress the pulse distortion through improvement of initial pulse contrast between main and side pulses and improved pulse shape using chirped pulse amplification and a fast intensity modulator driver by a corrected electrical signal that is generated from the original optical signal. The structure providing the improvement includes the photodiode, which is operative to measure the chirped optical pulse and convert it to the electrical signal, and analog electronics that quickly converts the electrical signal to the required signal that suppress the side pulses.

Description

technical field [0001] The present invention relates to an ultrafast pulsed fiber laser system with scalable output power with reduced degradation to pulse integrity. Specifically, the fiber laser system of the present invention is configured as a fast intensity modulator driven by a corrected electrical signal generated from the initial optical signal by improving the initial pulse contrast between the main and side pulses and by using chirped pulse amplification and Improve pulse shape to suppress pulse distortion. Background technique [0002] Ultrafast pulsed lasers generate pulses shorter than 20 picoseconds and as short as 5 femtoseconds. These lasers find applications in medicine and industry. Laser processing with ultrashort pulses works on the principle of cold ablation via multiphoton absorption. These types of pulses produce a very small heat-affected zone and virtually no kerf. This allows them to be used for machining delicate parts or machined materials tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/13H01S3/067
CPCH01S3/06758H01S3/10015H01S3/10053H01S3/0057H01S3/0085H01S3/1003H01S2301/08H01S3/1301H01S3/1305
Inventor 亚历克斯·尤西姆伊格尔·山马尔特瑟夫奥列格·什库林金
Owner IPG PHOTONICS CORP
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