Device for generating laser with new wavelength from ultrashort laser pulse with different sum frequencies

An ultra-short laser and pulse technology, which is applied in laser devices, lasers, laser parts and other directions, and can solve the problems such as the inability of the laser space to be independent, the synchronization accuracy is low, and the optical path is complex.

Inactive Publication Date: 2009-12-09
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0003] The synchronization of ultrashort laser pulses can be divided into passive synchronization and active synchronization. Passive synchronization is usually achieved by coupling two mode-locked laser pulses in the cavity of a strong Kerr effect crystal. It has the advantage of high synchronization accuracy, but The optical path is complex, not easy to adjust, and the two lasers cannot be independent in space; active synchronization uses electronic phase-locked loop feedback to control the repetition frequency of the laser to achieve synchronization. Although it can overcome the above disadvantages, the synchronization accuracy is relatively low. lower

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  • Device for generating laser with new wavelength from ultrashort laser pulse with different sum frequencies
  • Device for generating laser with new wavelength from ultrashort laser pulse with different sum frequencies
  • Device for generating laser with new wavelength from ultrashort laser pulse with different sum frequencies

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Embodiment 1

[0029] Such as Figure 1 to Figure 4As shown, this embodiment provides a device for generating a new wavelength laser with ultrashort laser pulses with different sum frequencies, including a picosecond laser 1, a femtosecond laser 2, a nonlinear crystal 10, a synchronization control system, and an optical path adjustment system The picosecond laser 1 is used to generate the picosecond laser, the femtosecond laser 2 is used to generate the femtosecond laser, the nonlinear crystal 10 is used to generate nonlinear frequency conversion between the synchronized lasers, and the synchronization control system is used to combine the two lasers. The optical signal is converted into an electrical signal and output the control signal for driving the optical path adjustment system to realize the active synchronization of the two lasers. The synchronization control system includes the first high-speed photodetector 101, the second high-speed photodetector 102, and the first phase-locked loop. C...

Embodiment 2

[0045] Such as Figure 5 with Figure 6 As shown, the synchronous control system of the device for generating new wavelength laser with ultrashort laser pulses with different sum frequencies provided in this embodiment includes the first phase-locked loop circuit 3 and the second phase-locked loop circuit 4 of embodiment 1, and also includes The third phase-locked loop circuit 5, the third high-speed photodetector 301, the third phase-locked loop circuit 5 includes a DC stabilized power supply 306, a stabilized chip 307, a potentiometer 308, a subtractor 302, a precision operational amplifier 303, and a loop The filter 304, the adjustable potentiometer 305, and the DC stabilized power supply 306 are sequentially connected to the voltage regulator chip 307, the potentiometer 308, the subtractor 302, the precision operational amplifier 303, the loop filter 304, the adjustable potentiometer 305, and the second lock On the second second-order filter circuit 211 of the phase loop circu...

Embodiment 3

[0049] Such as Figure 7 As shown, in addition to the structure of embodiment 2, the device for generating a new wavelength laser with ultrashort laser pulses with different sum frequencies provided in this embodiment also includes an electronic computer 7, which is electrically connected to a translation stage 9, with To control the movement of the translation stage 9. The electronic computer 7 constantly monitors the relative cavity length changes of the two lasers. It accurately controls the displacement of the translation stage 9 to compensate for the changes in the laser cavity length caused by changes in the external environment and other factors. Once the synchronization is started, the two lasers will always be maintained. Synchronous, there is always a stable sum frequency laser output.

[0050] The real-time control of the electronic computer is added to improve the synchronization maintenance time. If there is no electronic computer for real-time control, the synchroniz...

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Abstract

The invention discloses a device for generating laser with new wavelength from ultrashort laser pulse with different sum frequencies, comprising at least one picoseconds laser, at least one femto-second laser, at least one nonlinear crystal, a synchronous control system and a light path adjusting system, wherein the picoseconds laser is used for generating picoseconds laser; the femto-second laser is used for generating femto-second laser; the synchronous control system is used for realizing the active synchronization of each laser; the nonlinear crystal is used for generating nonlinear frequency conversion between synchronous lasers; and the light path adjusting system is used for adjusting the length of an oscillating cavity of the femto-second laser and adjusting the beam transmission of the femto-second laser and the picoseconds laser. The invention combines different ultrashort pulse lasers and utilizes an electronic phase-locked loop feedback circuit to control the telescoping degree of a piezoelectric actuator and the displacement of an electric platform so as to realize active synchronization with high precision, and on the basis, sum frequency is performed to the synchronous laser pulse in a nonlinear crystal with a matched phase, thereby generating a broadband ultrashort pulse laser with a new wavelength.

Description

Technical field [0001] The invention relates to a device for generating laser light, in particular to a device for generating laser light of a new wavelength through ultrashort laser pulses with different sum frequencies. Background technique [0002] In the research of laser technology, ultrashort pulse laser, as a symbol of the time limit that humans can control, and its unique characteristics of revealing the transient dynamics of matter in the microscopic world, has always been one of the most popular laser research contents, and ultrashort pulse laser research An important part of this is to extend the wavelength range of ultrashort pulse lasers. Because the laser wavelengths that commonly used femtosecond and picosecond lasers can produce are limited to a few fixed wavelength ranges, which are far from meeting the application requirements of ubiquitous ultra-short laser pulses, people often use optical parametric oscillations. (OPO) and Optical Parametric Amplification (OPA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35H01S3/23H01S3/00
Inventor 魏志义王鹏赵环杜强
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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