Narrow spectrum full solid state single mode fiber output seed laser

Abstract

The invention relates to a narrow spectrum all solid-state single mode fiber output seed laser which consists of a pumping source, an optical fiber, a collimating lens group, a back-cavity mirror, a laser crystal, an output cavity mirror, an extender lens and a single mode fiber provided with a coupling lens in turn, and is characterized in that: the pumping source is a laser diode which emits laser light of an 808 nanometer wavelength; the back-cavity mirror is a plane mirror capable of reflecting all fundamental waves of 1064 nanometer and allowing pump light of 808 nanometer to penetrate; the laser crystal is an Nd:YVO4 laser crystal; the output cavity mirror is a plane mirror capable of allowing fundamental wave part to penetrate and reflecting all pump light; the single mode fiber provided with the coupling lens is a single mode polarization-maintaining fiber provided with the coupling lens. The narrow spectrum all solid-state single mode fiber output seed laser of the invention has the characteristics of single mode, narrow spectrum and fiber output.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to a narrow-spectrum all-solid-state single-mode fiber output seed laser capable of obtaining high-power single-mode, fiber output, single wavelength, and continuous laser. Background technique [0002] All-solid-state lasers with high power and good beam quality have important applications in industry and military. The seed light source for high-power fiber amplifiers usually uses an all-solid-state single-mode seed laser, and the implementation methods usually include: [0003] 1. By changing the structure and parameter design of the resonator, a large difference in the diffraction loss of each mode is obtained to suppress the high-order mode vibration; [0004] 2. Insert additional mode selection components in the resonant cavity, such as aperture diaphragms to select modes. [0005] However, the volume of the device in the above method is large, or the insertion loss is too large, o...

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Problems solved by technology

[0005] However, the volume of the device in the above method is large, or the insertion loss is too large, or it is difficult to achieve a certain power single-mode output, and there are problems such as low efficiency or complex structure and not compact in the process of splitting and coupling into the optical fiber; due to the gain Due to the thermal effect of the medium and other reasons, it is often difficult to achieve single-mode output for high-power all-solid-state lasers that are directly pumped; fiber lasers that are directly pumped often have a wide spectrum, and there are problems such as low efficiency in the wavelength selection process.

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