Compact Tunable External-Cavity Surface-Emitting Green Laser

Xiaolang, 邱小浪 Qiu; Xuehua, 陈雪花 Chen; Renjiang, 朱仁江 Zhu; Peng, 张鹏 Zhang; He-yang, 郭于鹤洋 Guoyu; Yanrong, 宋晏蓉 Song

doi:10.3788/cjl201946.0401002

Cited by 3 publications

(1 citation statement)

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“…According to the acquisition process of waveform simulation in dual-color laser field imaging [7], if the laser device is selected as the QNd : YAG solid-state laser device, the length of the sent simulated laser waveform can pass through the atmospheric window [8], and the sent simulated laser waveform conforms to Gaussian distribution characteristics in both time and space. Then it can obtain:…”

Section: Emission Source Of Dual-color Laser Field Imagingmentioning

confidence: 99%

An enhancement method of waveform simulation in dual-color laser field imaging based on Internet of Things

Yin

Xiong

et al. 2022

Mobile Netw Appl

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In view of the fact that the existing methods are easy to be affected by nonlinear factors in the incident process of the light source, resulting in the received shock wave inconsistent with the reality and large calculation error, a two-color laser field imaging waveform simulation and enhancement method based on the Internet of things is proposed. According to the automatic transformation characteristics of augmented reality technology, the waveform simulation control process of two-color laser field imaging is constructed. The Gaussian distribution characteristics are used to analyze the target, the optical grid and double oscillation device are used to control the results, the spectrum Fourier transform is used to adjust the phase of the waveform, and finally the simulated modulated laser waveform is output. Through the comparison of laser waveform spectrum and peak value, the results show that this method is closest to the actual laser waveform, saves calculation time, and has good practical application effect.

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Section: Emission Source Of Dual-color Laser Field Imagingmentioning

confidence: 99%

An enhancement method of waveform simulation in dual-color laser field imaging based on Internet of Things

Yin

Xiong

et al. 2022

Mobile Netw Appl

View full text Add to dashboard Cite

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High power widely tunable frequency-doubled 490 nm blue semiconductor disk laser

Peng,

Wang,

Zhu

et al. 2024

Opt. Express

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This paper presents a high power widely tunable frequency-doubled semiconductor disk laser emitting at 490 nm wavelength. The laser utilizes a specially designed gain chip with widened gain spectrum at the center wavelength of 980 nm, along with an anti-resonant microcavity, to extend the tuning range of the wavelength. A type-I phase-matched 5 mm length LBO crystal is used as the nonlinear crystal, and a fused quartz birefringent filter (BRF) is introduced to polarize the fundamental emission and narrow the linewidth of the laser. When the thickness of the used BRF is 1 mm, 50.7 nm tuning range of the 980 nm infrared laser is performed. A maximum output power of 5.36 W of the frequency-doubled 490 nm blue laser is achieved, and the optical-to-optical conversion efficiency from absorbed pump power to the blue light is about 15.3%. Meanwhile, a record tuning range of 21.5 nm of the blue laser is realized. The measured M2 factors of the blue laser are 1.00 in the x-direction and 1.04 in the y-direction, respectively.

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509 nm high power wide-tuned external cavity surface emitting laser

Wang,

Peng,

et al. 2024

Acta Phys. Sin.

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High power widely tunable green lasers have potential applications in many fields such as biomedical, lidar, laser spectroscopy, laser display, underwater wireless optical communication, fine processing of nonferrous metals, and so on. Vertical-external-cavity surface-emitting lasers, also known as semiconductor disk lasers, have the advantages of high power, good beam quality and wide bandwidth of gain medium. In this paper, a gain chip with reverse-growth epitaxy structure and emitting wavelength of 1018 nm is designed. A bandwidth of 74 nm above the reflectivity of greater than 99.1 % in the DBR reflection spectrum is obtained, which lays a solid foundation for the realization of high-power widely tunable output. The laser cavity combines a 1018 nm semiconductor gain chip, a folded mirror, and a plane mirror to construct a compact V-shaped resonant cavity. A class I phase-matched LBO nonlinear crystal with a length of 10 mm is placed at the beam waist of the cavity to realize a highly efficient frequency doubling process to produce 509 nm green laser. To meet the requirement of the polarization during frequency conversion and to tune the oscillating wavelength of the laser, a birefringent filter (BRF) is employed in the laser resonant cavity. When the thickness of the used BRF is 1 mm, the obtained wavelength tuning ranges of the fundamental laser and the frequency doubled green laser are 47.1 nm and 20.1 nm, respectively, showing a good tuning capability of the laser. The laser's performance varies with the different thickness of the BRF. When using a 2 mm BRF, a maximum output power of the frequency-doubled green laser of 8.23 W is achieved during continuous tuning, indicating an ideal compatibility of wide tuning characteristics and a high output power. Meanwhile, its beam quality M<sup>2</sup> factors are 1.00 and 1.03 in the x and y directions, respectively, demonstrating a near diffraction-limited excellent beam quality. This green laser also possesses a frequency doubling conversion efficiency of up to 68.2 %, which enables efficient conversion of the fundamental laser into the frequency doubled green laser. The optical-to-optical conversion efficiency from the absorbed pump light to the frequency-doubled green light also reaches 16.6 %. Meanwhile, the spectral linewidths of the green lasers under different thicknesses of BRFs are found that the thicker the BRF, the narrower the laser line widths, which is consistent with the theoretical results.

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Compact Tunable External-Cavity Surface-Emitting Green Laser

Cited by 3 publications

References 0 publications

An enhancement method of waveform simulation in dual-color laser field imaging based on Internet of Things

An enhancement method of waveform simulation in dual-color laser field imaging based on Internet of Things

High power widely tunable frequency-doubled 490 nm blue semiconductor disk laser

509 nm high power wide-tuned external cavity surface emitting laser

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