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Femtosecond pulse power magnification method and device based on double-periodicity poled crystals

A technology of periodic polarization and power amplification, applied in the field of laser detection, it can solve the problems of loss of pulse time domain information, inability to amplify femtosecond laser power, etc., and achieve the effect of high-precision locking

Active Publication Date: 2016-04-13
HARBIN INST OF TECH
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Problems solved by technology

[0010] In view of the problems that the above-mentioned optical power amplification method and device cannot amplify the femtosecond laser power and the pulse time domain information is lost after the optical power is amplified, the present invention proposes and designs a femtosecond pulse power amplification method based on double-periodically polarized crystals and device

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Embodiment Construction

[0025] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026]The femtosecond pulse power amplification device based on double-periodically polarized crystals of this embodiment, figure 1 A schematic diagram of its overall configuration structure, figure 2 It is a schematic diagram of the device structure. The device is composed of a local femtosecond laser 3, a balanced photoelectric detection unit 1, a control unit 2, and a splitting optical path 4; Input end; two output ends of light splitting optical path 4 point to the far end and the input end of balance photodetection unit 1 respectively; The output end of balance photodetection unit 1 is connected to the input end of control unit 2; The output end of control unit 2 is connected to Local femtosecond laser3.

[0027] The structure of the split optical path 4 is: the femtosecond laser emitted from the far end enters the input end of the No. 1 optica...

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Abstract

The invention discloses a femtosecond pulse power magnification method and device based on double-periodicity poled crystals and belongs to the field of laser detection. According to the method, based on a femtosecond pulse sequence with extremely low power emitted by a far end, a local femtosecond laser device emits a new pulse sequence back, and a feedback signal is generated by means of the nonlinear effect and birefrigent effect of the periodicity poled crystals for feedback control of the pulse repetition frequency of the local femtosecond laser device, so that the pulse of an output signal coincides with that of the original signal in real time in a locked mode. The femtosecond pulse power magnification device comprises the local femtosecond laser device, a balance photoelectric detection unit, a control unit and a split light path. According to the femtosecond pulse power magnification method and device, femtosecond laser power magnification is achieved, and the pulse time domain information of the original signal is reserved by means of the attosecond-order allan variance.

Description

technical field [0001] The invention belongs to the field of laser detection, and mainly relates to a method and a device for amplifying femtosecond laser power in ultra-long-distance precision measurement. Background technique [0002] Ultra-long-distance precision laser measurement is a key technology necessary for large-scale scientific installations and space missions. With the rapid development of science and technology, the demand for its measurement range and accuracy is also increasing. For example, in recent years, the construction of large-scale scientific devices such as gravitational wave detection has become a research hotspot around the world. The detection of gravitational waves is a direct verification of the predictions of general relativity and a direct test of its core ideas. It is of great significance to study the origin and evolution of the universe and the grand unified model. The detection of gravitational waves also directly contributed to the birth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/13H01S3/098H01S3/16
CPCH01S3/1305H01S3/1645
Inventor 郭佳豪谭久彬
Owner HARBIN INST OF TECH
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