Square-wave pulse laser device and square-wave pulse laser generating method

Abstract

The invention provides a square-wave pulse laser device, which comprises a nonlinear amplification environment NALM and a pulse laser main oscillation cavity, wherein the nonlinear amplification environment NALM is used for performing intra-cavity pulse shaping on laser pulse; and the pulse laser main oscillation cavity is used for circularly oscillating a square-wave laser pulse sequence in the nonlinear amplification environment NALM and the pulse laser main oscillation cavity and generating and outputting square-wave laser pulse. The invention also provides a square-wave pulse laser generating method, which comprises the following steps of: inputting continuous laser to excite a working substance to generate primary laser pulse; and performing intra-cavity pulse shaping on the primary laser pulse through the nonlinear amplification environment NALM, and circularly oscillating the primary laser pulse in the nonlinear amplification environment NALM and the pulse laser main oscillation cavity to generate the square-wave laser pulse. According to the pulse laser device and the method provided by the embodiment of the invention, the pulse laser device can directly output the square-wave laser pulse and has the characteristics of self start and simple adjustment.

Description

technical field [0001] The invention relates to the field of lasers, in particular to an all-fiber nanosecond square-wave pulse laser and a square-wave pulse laser generation method. Background technique [0002] In the research of laser inertial confinement nuclear fusion, it is required that the front-end system as the "seed light source" of the high-power laser fusion driver can provide several nanosecond square wave lasers with certain energy, bandwidth, high signal-to-noise ratio and high beam quality for the follow-up system pulse. The development of such a high-performance square-wave laser pulse has become the key to the success of the entire front-end system and even the driver of confinement fusion. The existing nanosecond square wave pulse generation technology in the current front-end system is generally divided into two categories: pulse modulation technology and pulse combination technology. [0003] The core idea of ​​time-domain modulation shaping comes fro...

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Problems solved by technology

However, the current pulse stacking technology still has a lot of difficulties to be solved. For example, because the pulse stacking technology uses partially coherent laser pulses for stacking, due to the coherence of the laser pulses, coherent noise will be generated at the overlap of the pulses, making the shaped pulse There are small fluctuations in the periodic structure in time, and this kind of pulse is not allowed to exist in the use of the back-end system, and the pulse accumulation system itself is extremely complicated and expensive

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