Order controllable enhanced stimulated Brillouin scattering utilizing cascaded diamond Raman conversion

Chen, Hui; Bai, Zhenxu; Cai, Yunpeng; Yang, Xuezong; Ding, Jie; Qi, Yaoyao; Yan, Bingzheng; Li, Yunfei; Wang, Yulei; Lü, Zhiwei; Mildren, Richard P.

doi:10.1063/5.0137542

Cited by 19 publications

(6 citation statements)

References 45 publications

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“…When the cavity length was precisely increased and decreased by only 14 μm, the spectrum was as illustrated in Figures 3(c) and 3(e), respectively. A satellite peak at a separation of about 70 GHz appeared on the longer wavelength side of the SRS, which matched the theoretical diamond Brillouin frequency shift reported previously [ 29 – 31 ] . At that time, the FPI trace was as shown in Figures 3(d) and 3(f), respectively, and the longitudinal structure was tuned to multiple-longitudinal modes.…”

Section: Resultssupporting

confidence: 90%

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Liu

Zhu

Sun

et al. 2023

High Pow Laser Sci Eng

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A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power of up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and was maintained at the highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes output reached 20.6 W, corresponding to a 30% optical-to-optical conversion efficiency from 1064 to 1240 nm. The result shows that parasitic SBS is the main physical process disturbing the SLM operation of Raman oscillator at higher power. In addition, for the first time, the spectral linewidth of a CW SLM diamond Raman laser was resolved using the long-delayed self-heterodyne interferometric method, which is 105 kHz at 20 W.

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Section: Resultssupporting

confidence: 90%

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Liu

Zhu

Sun

et al. 2023

High Pow Laser Sci Eng

Self Cite

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Section: Resultsmentioning

confidence: 99%

“…When the input voltage is set to 900 V, the pump energy is 428 mJ, the Stokes energy is 388 mJ, and the energy reflectivity is 90.7%. Moreover, the beam profile of the injected pump light was improved to some extent via the action of SBS-PCM, and the energy distribution of the laser spot output became more uniform [20,21]. In the Stokes light amplification experiment, the generated Stokes beam is separately injected into two amplification cells for amplification, and the injected Stokes light is amplified by extracting the energy from the injected pump light; the energy change in the two is shown in Figure 6.…”

Section: Resultsmentioning

confidence: 99%

Passive Phase Locking Coherent Combination of Solid-State Lasers through Stimulated Brillouin Scattering Effect

Yu,

Li,

Song

et al. 2023

Photonics

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The stimulated Brillouin scattering (SBS) effect, a new approach to the combination of solid-state lasers, can be actualized via coherent synthesis. In this paper, a solid-state laser based on SBS passive phase locking, utilizing the master oscillator power amplifier (MOPA) structure at the front end of the lasers, provides the amplification of the Stokes light subsequently generated. In order to reduce the influence of thermal effects on beam quality, beam-split amplification has been adopted with the same phase locking used by the back injection of the Stokes pulse. With the advantage of the combined scheme, the energy extraction efficiency of SBS coherent combination can be reached at 91.8% with coherent fringe visibility of 83%. Therefore, it provides a new way to improve the brightness through realizing the coherent combination of multi-channel solid-state lasers.

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“…According to the principle of optical communication [18], it is possible to calculate the time delay of the small angle analysis method as follows:…”

Section: Frontiers In Physics Frontiersinorg Modelmentioning

confidence: 99%

Research on underwater wireless dynamic optical communication system based on PPM modulation

et al. 2023

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In order to achieve underwater wireless dynamic optical communication, a laser communication system is proposed based on Pulse Position Modulation (PPM). In order to achieve underwater laser communication accurately, the mathematical model of underwater laser communication was constructed with small angle analysis. The pulse position modulation demodulation algorithm is designed, and the workflow of modulation and demodulation is given in the transmit module and the receive module. In the experiment, Lumileds-470 nm light source was selected for data communication for testing at a communication rate of 15 Mbp/s. In the servo control process, the square wave signal used for stepping motor drive had a stable amplitude output and a stable time width. It can well simulate the testing process of underwater dynamic scanning. In the experiment, laser light spots were obtained under different attenuation states, and the characteristics of the light spot distribution were analyzed. The numerical reconstruction of the light spot energy was completed in MATLAB. Three types of light attenuators, 1.0%, 0.1%, and 0.01%, were used to simulate different light attenuations underwater. The test results show that the system error rate is better than 10−6 when attenuation chip is 1.0%. When attenuation chip is 0.1%, the error rate of the system is reduced to 10−4. When attenuation chip is 0.01%, a valid signal cannot be obtained by the system. The feasibility of the system is verified.

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Order controllable enhanced stimulated Brillouin scattering utilizing cascaded diamond Raman conversion

Cited by 19 publications

References 45 publications

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Passive Phase Locking Coherent Combination of Solid-State Lasers through Stimulated Brillouin Scattering Effect

Research on underwater wireless dynamic optical communication system based on PPM modulation

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