Wireless optical power transmission based on the off-axis VECSEL of long resonator

Zhang, Zhuo; Zhang, Jianwei; Zhou, Yinli; Zhang, Xing; Zhang, Jiye; Zhang, Jun; Q, Li; Wang, Lijun

doi:10.1016/j.optlastec.2022.108926

Cited by 2 publications

(1 citation statement)

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“…Therefore, the design of the resonant cavity needs to calculate the matrix transformation of the intracavity beam ABCD matrix after passing through each lens. According to the stability condition of the coaxial spherical cavity, the stability parameter range of the resonant cavity is calculated by using the ABCD matrix [ 27 , 28 ]. Figure 2 shows the stable working parameter range of the laser resonator; the area where the laser resonance cannot work stably is represented by blue.…”

Section: System Overview and Methodsmentioning

confidence: 99%

High-Efficiency Frequency Doubling Blue-Laser VECSEL Based on Intracavity Beam Control

Zhang,

et al. 2024

Sensors

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Blue lasers are integral to a variety of applications, including marine communication, underwater resource exploration, cold laser processing, laser medicine, and beyond. Vertical external cavity surface-emitting lasers (VECSELs) have the advantages of high output power and tunable wavelength, and can output blue laser via frequency doubling. In this article, a new type of intracavity beam control external-cavity structure is introduced. The laser beam waist is effectively adjusted by intracavity beam control, and the frequency conversion efficiency is improved. A laser cavity stability analysis model was developed to investigate the impact of laser cavity lens parameters and relative positions on stability. The external resonant cavity of VECSELs utilizes two optical lenses to position the beam waist near the laser output coupling mirror and locates the frequency doubling crystal at a high optical power density position to optimize frequency conversion efficiency. The VECSEL straight external-cavity structure achieves a frequency conversion efficiency of up to 60.2% at 488 nm, yielding a blue laser output exceeding 1.3 W. The full width at half maximum of the 488 nm spectrum measures approximately 0.23 nm. This intracavity beam-controlled direct external-cavity structure effectively mitigates laser mode leakage and shows potential for the development of an efficient and compact blue laser source.

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Section: System Overview and Methodsmentioning

confidence: 99%