Large-cavity-mode-volume ultrafast laser feedback amplifier
A feedback amplifier and ultrafast laser technology, applied in the laser field, can solve the problems of small mode volume, low single pulse energy of short-pulse laser oscillator, and high peak power density of ultrashort-pulse laser, so as to increase cavity mode volume and improve Laser amplification capability, effect of high power high beam quality short pulse laser amplification
Active Publication Date: 2019-02-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology
The single pulse energy of short-pulse laser oscillators with high repetition rate is low, generally between tens of nJ and hundreds of nJ, which is difficult to meet the needs of practical applications. Regenerative amplification technology is one of the effective ways to achieve ultrafast laser single pulse energy amplification.
[0003] The existing regenerative amplification technology belongs to the self-reproducing mode amplification. The problem is that the mode volume is small, the peak power density of the ultrashort pulse laser is high, and the damage threshold of the device is limited, and the power amplification capability is limited.
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0022] figure 1 It is a schematic diagram of the prior art regenerative amplification technology.
[0023] Such as figure 1 As shown, the first regenerative amplifier cavity mirror A and the second regenerative amplifier cavity mirror B constitute a stable laser amplification cavity with mode self-reproduction. The seed laser pulse enters the laser amplification cavity through the switch of the pulse selector and passes...
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The invention discloses a large-cavity-mode-volume ultrafast laser feedback amplifier, comprising first ultrafast nonsteady lens (3-1), nonsteady cavity mode control lens (4), laser gain medium (2), guide lens (9), pulse photoswitch (10) and second ultrafast nonsteady lens (3-2) which are arranged sequentially along an optical axis, and also comprising laser seed source (7), bilateral splitter (8)and a beam shaping self-compensation system. The laser seed source (7) provides short pulse seed laser emitted to the bilateral splitter (8); the guide lens (9) is arranged on the optical axis of a first beam split by the bilateral splitter (8). The large-cavity-mode-volume ultrafast laser feedback amplifier is designed as large-diameter laser gain medium nonsteady cavity structure to operate; mode volume can be enlarged; the laser gain medium and an optical component can bear higher laser power; laser-amplifying capacity of the amplifier herein can be improved.
Description
technical field [0001] The invention relates to the field of laser technology, in particular to an ultrafast laser feedback amplifier with a large cavity mode volume. Background technique [0002] Ultrafast pulse lasers with a pulse width of picoseconds or less (pulse width of picoseconds or narrower) have a wide range of applications in many fields such as industrial micromachining and nonlinear frequency conversion. The single pulse energy of short-pulse laser oscillators with high repetition rate is low, generally between tens of nJ and hundreds of nJ, which is difficult to meet the needs of practical applications. Regenerative amplification technology is one of the effective ways to achieve ultrafast laser single pulse energy amplification. . [0003] Existing regenerative amplification technologies all belong to self-reproducing mode amplification. The problem is that the mode volume is small, and the peak power density of ultrashort pulse laser is high, which is limit...
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IPC IPC(8): H01S3/10H01S3/105H01S3/13
Inventor 彭钦军刘可申玉王小军薄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI