<title>Novel laser resonator with improved output beam quality</title>

Results of an experimental and theoretical analysis of the proprerties of a LD pumped laser using a stable resonator and second harmonic conversion crystal are presented. The influence of thermal lens effect on laser output mode and beam quality has been discussed briefly by using the transfer matrix theory. In this paper, further experiment on the output beam quality of a LD pumped acousto-optic Q-switched laser has been also performed by adopting Shack-Hartmann wavefront sensor and Zernike mode reconstruction theory. Using this method, PV and RMS error of aberration wavefront, the first 35-order Zernike aberrations can be acquired. Furthermore, Strehl ratio curve of output beam and the distribution of circle energy can also be obtained by further calculation, so mode properities can be comprehensively understood. Experimental results show that the beam wavefront aberration is mainly concentrated in the first 15 orders of Zernike aberration, mainly including the defocus A3, the low-order astigmatism A4 and A5, the coma and spherical aberration because of the thermal-lens effect.

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Improving the output beam quality of multimode laser resonators

Optics Express ◽

10.1364/opex.13.002722 ◽

2005 ◽

Vol 13 (7) ◽

pp. 2722 ◽

Cited By ~ 14

Author(s):

Amiel A. Ishaaya ◽

Vardit Eckhouse ◽

Liran Shimshi ◽

Nir Davidson ◽

Asher A. Friesem

Keyword(s):

Beam Quality ◽

Output Beam ◽

Laser Resonators ◽

Multimode Laser

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A Review of the High-Power All-Solid-State Single-Frequency Continuous-Wave Laser

Micromachines ◽

10.3390/mi12111426 ◽

2021 ◽

Vol 12 (11) ◽

pp. 1426

Author(s):

Weina Peng ◽

Pixian Jin ◽

Fengqin Li ◽

Jing Su ◽

Huadong Lu ◽

...

Keyword(s):

Solid State ◽

High Power ◽

Continuous Wave ◽

Beam Quality ◽

Optical Loss ◽

Low Noise ◽

Stimulated Emission ◽

Single Frequency ◽

Laser Resonator ◽

Laser Guidance

High-power all-solid-state single-frequency continuous-wave (CW) lasers have been applied in basic research such as atomic physics, precision measurement, radar and laser guidance, as well as defense and military fields owing to their intrinsic advantages of high beam quality, low noise, narrow linewidth, and high coherence. With the rapid developments of sciences and technologies, the traditional single-frequency lasers cannot meet the development needs of emerging science and technology such as quantum technology, quantum measurement and quantum optics. After long-term efforts and technical research, a novel theory and technology was proposed and developed for improving the whole performance of high-power all-solid-state single-frequency CW lasers, which was implemented by actively introducing a nonlinear optical loss and controlling the stimulated emission rate (SER) in the laser resonator. As a result, the output power, power and frequency stabilities, tuning range and intensity noise of the single-frequency lasers were effectively enhanced.

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