Method and device for the fast phase evaluation, in particular of multi-cycle pulses of laser radiation

A technology of laser pulse and laser radiation, applied in the direction of instruments, etc., can solve the problems that are no longer feasible and have great uncertainty

Inactive Publication Date: 2014-04-16
FEMTOLASERS PROD GBMH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] 2) If △r reaches the size order of r, CEP measurement will no longer be feasible, because the uncertainty of CEP determination will become too large
Use of these techniques for rapid CE phase assessment is unknown

Method used

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  • Method and device for the fast phase evaluation, in particular of multi-cycle pulses of laser radiation
  • Method and device for the fast phase evaluation, in particular of multi-cycle pulses of laser radiation
  • Method and device for the fast phase evaluation, in particular of multi-cycle pulses of laser radiation

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Embodiment Construction

[0024] figure 1 The intensity history of a known laser pulse 1 is schematically illustrated. exist figure 2 In , a second laser pulse 2 time-delayed with respect to the first laser pulse 1 is shown behind the first laser pulse 1 as a copy of the first laser pulse 1 in dashed lines, the two laser pulses 1 , 2 partially overlapping each other. Overlapping laser pulses 3 are formed.

[0025] The overlapping laser pulse 3 is linearly polarized in its central pulse region and elliptically polarized in its two outer pulse regions 5 , 6 .

[0026] image 3 The course 16 of the elliptical polarization in the two outer pulse regions 5 , 6 is shown. In region 4, the linear polarization is only about two optical periods.

[0027] Figure 4 An alternative embodiment of the invention is illustrated as a device for fast phase evaluation of ultrashort laser pulses. For a time-dependent change in its polarization, the laser pulse train 7 first hits a polarization gating stage 8 compri...

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Abstract

The aim of the invention is to enable a fast CE phase evaluation of the laser pulses, in particular in real time, including for multi-cycle pulses. Said aim is achieved by providing a polarization gating stage (8) for changing the laser pulses (7) to be evaluated in the phase and a subsequent phase evaluation stage (15) for measuring the phase position of the changed laser pulses. The invention is used for example in laser technology for producing and monitoring single-cycle pulses.

Description

technical field [0001] The invention relates to a method and a device for fast phase evaluation of multi-period pulses, in particular of laser radiation. Background technique [0002] The absolute phase is defined as the offset between the maximum and the nearest maximum of the pulse envelope of the carrier wave of the electric field of the laser pulse. Absolute phase is often also referred to as carrier envelope phase (CEP). Thus, this is a quantity needed to describe the precise history of the electric field of any kind of laser pulse. CEP plays an important role, especially in laser pulses whose pulse envelope has a FWHM (full width at half maximum) of only a few optical periods (so-called cycle-scale pulses or monocycle pulses), because of the The electric field has a particularly large CEP-dependent asymmetry. However, CEP dependence was also observed in trials with multi-period pulses. [0003] Single-cycle pulses have been produced since 1997 (M.Nisoli, S.Stagira,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 格奥尔格·格哈德·保卢斯马克斯韦尔·阿图尔·塞勒蒂姆·拉特耶马克斯·默勒多米尼克·霍夫
Owner FEMTOLASERS PROD GBMH
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