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High-power, high-repetition-frequency and pulse-width-adjustable ultrafast laser system

A high repetition rate, ultrafast laser technology, applied in the laser field, can solve the problems of inability to perform pulse width modulation and low pulse repetition frequency

Active Publication Date: 2020-08-04
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] Based on this, it is necessary to provide an ultrafast laser system with high power, high repetition rate and adjustable pulse width for the problems of low pulse repetition frequency and inability to perform pulse width modulation in existing lasers.

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  • High-power, high-repetition-frequency and pulse-width-adjustable ultrafast laser system

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[0090] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0091] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" an...

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Abstract

The invention relates to a high-power, high-repetition-frequency and pulse-width-adjustable ultrafast laser system. Laser pulses with the repetition frequency of GHz or above are generated through a laser seed source. A broadening and amplifying module is used for amplifying and broadening the laser pulse. A pulse modulation module modulates the amplified and broadened laser pulses to generate a plurality of laser pulse strings with different frequencies and different duty ratios, and the laser pulse strings are amplified step by step by adopting a multi-stage amplification module. A nonlinearcompression amplification module adjusts the spectrum broadening by controlling the pumping power or the nonlinear quantity; and the broadening degree of the laser pulse and the frequency and duty ratio of the pulse modulation module are continuously adjusted by combining the broadening amplification module, so that different nonlinear compression pulse widths can be obtained, and the pulse widthcan be continuously adjusted from picosecond to femtosecond. The pulse compression module compresses and outputs the laser pulse with continuously adjustable pulse width, so that the laser pulse withhigh power, high repetition frequency and adjustable pulse width is output.

Description

technical field [0001] The present application relates to the field of laser technology, in particular to an ultrafast laser system with high power, high repetition rate and adjustable pulse width. Background technique [0002] With the rapid development of femtosecond pulse laser generation and amplification technology, ultrafast pulse laser is widely used in basic research and core industrial production in various fields, and has spawned a number of promising emerging disciplines and technologies, such as femtosecond Chemistry, laser biology, strong field physics, nanomaterials, nonlinear optics, nanophotonics, and quantum communication. [0003] However, although lasers based on high-energy femtosecond laser technology represented by chirped pulse amplification can provide extremely high single-pulse energy (μJ-mJ), their pulse repetition frequency is basically at the kHz-MHz level and pulse width modulation cannot be performed. , which seriously limits the overall avera...

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Application Information

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IPC IPC(8): H01S3/00H01S3/067H01S3/094H01S3/10H01S3/102
CPCH01S3/0057H01S3/094H01S3/06754H01S3/10007H01S3/1001H01S3/10046H01S3/1024
Inventor 杨中民刘逸才吴经锋韦小明林巍王文龙乔田关先朝
Owner SOUTH CHINA UNIV OF TECH
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