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Neodymium-doped yttrium vanadate single crystal optical fiber ultrashort pulse amplifier

A technology of neodymium-doped yttrium vanadate and ultrashort pulses, which is applied to lasers, laser components, phonon exciters, etc., can solve problems such as poor heat dissipation characteristics, complex systems, and poor beam quality, and achieve high heat dissipation and high Effects of beam quality and peak power enhancement

Pending Publication Date: 2022-02-18
神锋(苏州)激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fiber amplifiers have the characteristics of small size, high integration, good stability, maintenance-free and good beam quality, and have been applied to the amplification of ultrashort pulses. However, the strong dispersion and nonlinear effects of fiber amplifiers limit the improvement of their peak power. , so that the fiber amplifier is suitable for use as a preventive amplifier; the advantage of a solid amplifier is that it can obtain a high-energy pulsed laser, and the effect of suppressing nonlinear effects is good, but the natural beam quality is poor, and the system for controlling the beam quality is complicated. Poor characteristics

Method used

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  • Neodymium-doped yttrium vanadate single crystal optical fiber ultrashort pulse amplifier
  • Neodymium-doped yttrium vanadate single crystal optical fiber ultrashort pulse amplifier

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Embodiment 1

[0029] attached figure 1 It is a structural schematic diagram of a neodymium-doped yttrium vanadate single crystal fiber ultrashort pulse amplifier of the present invention, including a pump laser 1, a coupling mirror 2, a seed laser 3, a neodymium-doped yttrium vanadate single crystal fiber 4, and a first dichroic mirror 5 and a second dichroic mirror 6 .

[0030] In this embodiment, the pump laser 1 is a fiber-coupled semiconductor laser, the wavelength of the pump laser generated by it is 888nm, the numerical aperture of the output fiber is 0.22, and the core diameter is 105um. In order to reduce the reflection of the end face, the end face of the output fiber is at an angle of 8°.

[0031] The coupling mirror 2 is a lens group, including a first lens and a second lens. The first lens and the second lens form a 4f system. The coupling mirror 2 is placed after the output fiber of the pump laser 1, and vertically converges the 105um pump laser light to the The end face of t...

Embodiment 2

[0038] attached figure 2 It is a structural schematic diagram of another embodiment of a neodymium-doped yttrium vanadate single crystal fiber ultrashort pulse amplifier of the present invention, including a pump laser 1, a coupling mirror 2, a seed laser 3, a neodymium-doped yttrium vanadate single crystal fiber 4, A first dichroic mirror 5 and a second dichroic mirror 6 .

[0039] The difference between this embodiment and Embodiment 1 is that the second dichroic mirror 6 is located between the coupling mirror 2 and the Nd-doped yttrium vanadate single crystal fiber 4, and the first dichroic mirror 5 is located at the Nd-doped yttrium vanadate single crystal fiber 4 away from the second At one end of the dichroic mirror 6, the seed laser 3 is located at the end away from the pump laser 1, and the transmission direction of the pump laser is opposite to that of the ultrashort pulse laser.

[0040] as attached figure 2 As shown, the pump laser enters the neodymium-doped ytt...

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Abstract

The invention discloses a neodymium-doped yttrium vanadate single crystal optical fiber ultrashort pulse amplifier, and the amplifier comprises a pump laser, a coupling mirror, a seed laser, a neodymium-doped yttrium vanadate single crystal optical fiber, a first dichroic mirror and a second dichroic mirror. Pump laser emitted by the pump laser passes through the coupling mirror and then enters the neodymium-doped yttrium vanadate single-crystal optical fiber, ultrashort pulse laser emitted by the seed laser is reflected by the first dichroic mirror and enters the neodymium-doped yttrium vanadate single-crystal optical fiber, and after the energy of the ultrashort pulse laser is amplified, the ultrashort pulse laser leaves the neodymium-doped yttrium vanadate single-crystal optical fiber and is reflected and output by the second dichroic mirror. According to the invention, the advantages of optical fiber laser in the aspects of beam quality, high heat dissipation and the like and the advantages of solid laser in the aspects of high peak power, low nonlinear effect and the like are combined, the peak power of ultrashort pulse laser is improved while the high beam quality is maintained, and the ultrashort pulse laser is stable and reliable.

Description

technical field [0001] The invention relates to the technical field of laser pulse amplification, in particular to a neodymium-doped yttrium vanadate single crystal fiber ultrashort pulse amplifier. Background technique [0002] Ultrashort pulse laser has very important applications in the fields of precision micromachining, terahertz wave generation, biomedicine, and national defense research, and has always been a hot spot in the research and development of the laser field. With the continuous improvement of the needs of various industries, ultrashort pulses with higher peak power and higher energy are required. Ultrashort pulse amplification technology is the main method to obtain ultrashort pulse with high peak power. Ultrashort pulse amplification technology consists of a variety of approaches and methods, typical methods include fiber amplifiers and solid-state amplifiers. Fiber amplifiers have the characteristics of small size, high integration, good stability, main...

Claims

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Application Information

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IPC IPC(8): H01S3/094H01S3/067H01S3/16
CPCH01S3/06758H01S3/094042H01S3/094049H01S3/094076H01S3/1673H01S3/1611H01S3/06708
Inventor 亓云轩孙松松
Owner 神锋(苏州)激光科技有限公司