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Erbium-doped laser ultrashort pulse generation device and method

A technology of ultra-short pulse and generating device, which is applied in lasers, laser components, phonon exciters, etc., can solve the problems of narrow gain bandwidth of erbium-doped laser materials, lack of saturable absorbing devices, and difference in laser research progress, etc., to achieve Increased laser operation efficiency, good beam quality, and high laser conversion efficiency

Pending Publication Date: 2021-11-02
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the generation of narrower picosecond or even femtosecond ultrashort laser pulses, the research progress of lasers in different wavebands is also very different.
[0004] At present, the power of continuous lasers in the 1.6 μm band has increased rapidly, and the maximum output power at room temperature has reached more than 80 W. However, the average power of semiconductor-pumped erbium solid-state lasers in Q-switched pulse mode is still only on the order of watts, and the pulse width is tens of nanometers. seconds, it is difficult to obtain picosecond or even femtosecond ultrashort pulse laser by Q-switching
Due to the narrow gain bandwidth of erbium-doped laser materials working in the 1.6 μm band and the lack of mature saturable absorption devices, there is no report on ultrashort pulse lasers

Method used

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  • Erbium-doped laser ultrashort pulse generation device and method
  • Erbium-doped laser ultrashort pulse generation device and method
  • Erbium-doped laser ultrashort pulse generation device and method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the above-mentioned laser resonant cavity is composed of a laser input mirror 3, a resonant cavity reflector 5, a resonant cavity reflector 6 and a laser output mirror 8. Laser high reflection film with high transmittance and wavelength of 1.6-1.7μm is placed at right angles to the optical path as shown in the figure. Resonant cavity mirror 5 and resonant cavity mirror 6 are flat concave mirrors with a radius of curvature of 100mm, coated with Reflective film, the angle with the light path is less than 5°, the laser output mirror 8 is a flat mirror, the laser output transmittance is 0.5% and 2%, the laser cavity length is 1.9 meters; the pump light passes through the coupling unit, and the pump light that is continuously running The pump light energy is focused into the gain matrix, and the gain medium is affected by the resonant cavity to generate positive feedback. The strong light pulse is amplified by passing through the saturable absorber...

Embodiment 2

[0026] Such as figure 2 As shown, the above-mentioned laser resonator is composed of laser input mirror 3, resonator mirror 5, laser output mirror 6, resonator mirror 7 and reflective saturable absorber mirror 8, and the length of the laser cavity is 1.7 meters. The laser input mirror 3 is a plano-concave mirror with a radius of curvature of 100 mm, coated with a high-transmittance and high-reflection film for laser light, and placed at a small angle with the laser light path as shown in the figure, and the resonant cavity reflector 5 is a plano-concave mirror , the radius of curvature is 300mm, coated with laser high reflection film, the angle with the optical path is less than 5°, the laser output mirror 6 is a plane mirror, the laser output transmittance is 0.5% and 2%, the laser reflector 7 is a plano-concave mirror, The radius of curvature is 100mm, and the included angle with the optical path is less than 5°. In this example, the reflective saturable absorbing mirror 8 ...

Embodiment 3

[0032] The schematic diagram of the structure of the optical fiber pump source 1 described in the embodiment of the present invention is as follows image 3 shown. The above-mentioned fiber laser pumping source 1 is a narrow linewidth erbium-ytterbium co-doped fiber laser with tunable wavelength and power, consisting of a first semiconductor pumping source 11, a first pumping focusing lens 12, a first dichroic mirror 13; Pump source 21, second pump focusing lens 22, second dichroic mirror 23; erbium-ytterbium co-doped fiber 04, first laser collimator lens 32, second laser collimator lens 42, reflective volume Bragg grating 05 and broadband Mirror 06 composition. The first semiconductor pumping source 11 is a semiconductor laser with continuous output, the maximum laser power is 40W, the center wavelength is 975nm, and the spectral width is about 3nm; the first pumping focusing lens 12 and the second pumping focusing lens 22 It is a plano-convex lens with a focal length of 30...

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Abstract

An ultrashort pulse generation device based on mixed crystal erbium-doped laser ceramics comprises a laser pumping source (1), an optical coupling system lens group (2), a laser input mirror (3), a laser gain medium (4), a first resonant cavity reflector (5), a second resonant cavity reflector (6), a resonant cavity, a passive mode locking element (7) and a laser output mirror (8) which are arranged in sequence, wherein a laser signal emitted by the laser pumping source enters the laser gain medium through the optical coupling system lens group, the laser gain medium generates laser oscillation under the action of a resonant cavity formed by the laser input mirror, the resonant cavity reflectors and the laser output mirror (8), laser is modulated by the passive mode-locking element (7) in the resonant cavity, and ultrashort pulse laser is output through the laser output mirror (8). The ultrashort pulse generation device has simple method, can realize high-efficiency, high-power and high-beam-quality 1.6-micron ultrashort pulse laser operation, and obtains ultrashort pulse laser with different central wavelengths.

Description

technical field [0001] The invention relates to a solid-state laser device and method, in particular to a device and method for an ultrashort pulse laser working in the 1.6-micron human eye-safe band. Background technique [0002] The 1.6μm band laser is in the safe wavelength band for human eyes, and at the same time it is in the atmospheric transmission window of 1.5-1.8μm. It has certain photoelectric countermeasures and has direct application value not only in the fields of biomedicine, optical communication, laser radar, remote sensing detection, etc. Moreover, it can also be used as a basic light source to generate a 3-5 μm mid-infrared laser that has important applications in national security fields such as photoelectric countermeasures through nonlinear frequency conversion. High-power, high-beam-quality 1.6μm-band picosecond-femtosecond lasers have important applications and demands in many fields such as biomedicine, nonlinear frequency conversion, super-resolutio...

Claims

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Application Information

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IPC IPC(8): H01S3/094H01S3/081H01S3/098
CPCH01S3/0816H01S3/1112H01S3/094076
Inventor 杨晓芳孔维宾方忠庆周锋王如刚
Owner YANCHENG INST OF TECH
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