To address the challenge of achieving stable in-phase coherent optical field in high-power laser arrays,we propose a novel dual Talbot diffraction coupling method that combines the on-chip self-injection effect with a...To address the challenge of achieving stable in-phase coherent optical field in high-power laser arrays,we propose a novel dual Talbot diffraction coupling method that combines the on-chip self-injection effect with a mixed-resonant cavity diode laser array(MDLA).The designed MDLA incorporates two types of resonant cavities and an integrated external fractional Talbot cavity to compensate for in-phase mode phase delays.Numerical simulations demonstrate that the nearfield optical pattern can be self-imaged via self-organized phase-locking,while the far-field optical pattern of in-phase mode can be coherently enhanced and modulated to exhibit a single-lobe pattern successfully.Furthermore,this method could inherently provide strong optical coupling and overcome the limited scalability of the weakly-coupled laser arrays.Ultimately,by leveraging self-organized phase-locking and Talbot-induced mode discrimination,our approach offers a robust platform for realizing high-power coherent laser sources with scalable integration potential.展开更多
We report the experimental observation of two-dimensional Talbot effect when a resonance plane wave interacts with a two-dimensional atomic density grating generated by standing wave manipulation of ultracold Bose gas...We report the experimental observation of two-dimensional Talbot effect when a resonance plane wave interacts with a two-dimensional atomic density grating generated by standing wave manipulation of ultracold Bose gases. Clear self-images of the grating and sub-images with reversed phase or fractal patterns are observed. By calculating the autocorrelation functions of the images, the behavior of periodic Talbot images is studied. The Talbot effect with two-dimensional atomic density grating expands the applications of the Talbot effect in a wide variety of research fields.展开更多
The reflection Talbot effect under the illumination of Gaussian spherical wave and plane wave is observed on 1D and 2D photonic crystal of silicon prepared by nanosecond laser. It is found that the distance between tw...The reflection Talbot effect under the illumination of Gaussian spherical wave and plane wave is observed on 1D and 2D photonic crystal of silicon prepared by nanosecond laser. It is found that the distance between two adjacent Talbot images increases lineally with increasing of image distance as well as amplification of Talbot images under the illumination of Gaussian spherical wave. The result of theory is coincident with that of experiment, which shows that selecting suitable wavefront shape of input field can enlarge the amplification rate and improve the resolution of Talbot imaging. The reflection Talbot effect will have a lot of good application in microscopy of micro-fabrication on silicon, such as detecting period structures of plasma on line of PLD fabricating.展开更多
从双缝干涉的简单理论出发,将光栅分解为许多组双缝,利用人们熟知的干涉条纹间距公式导出Talbot成像位置,结论与Talbot效应公式一致。并由实验证实,在(2 m 1)d2/λ(m为正整数)的位置得到的为横向平移d/2的周期像,并非原周期性物的负反...从双缝干涉的简单理论出发,将光栅分解为许多组双缝,利用人们熟知的干涉条纹间距公式导出Talbot成像位置,结论与Talbot效应公式一致。并由实验证实,在(2 m 1)d2/λ(m为正整数)的位置得到的为横向平移d/2的周期像,并非原周期性物的负反差像。展开更多
基金funded by the Science and Technology Commission Foundation of the Central Military Commission(Grant No.2023-JCJQ-JJ-1008)。
文摘To address the challenge of achieving stable in-phase coherent optical field in high-power laser arrays,we propose a novel dual Talbot diffraction coupling method that combines the on-chip self-injection effect with a mixed-resonant cavity diode laser array(MDLA).The designed MDLA incorporates two types of resonant cavities and an integrated external fractional Talbot cavity to compensate for in-phase mode phase delays.Numerical simulations demonstrate that the nearfield optical pattern can be self-imaged via self-organized phase-locking,while the far-field optical pattern of in-phase mode can be coherently enhanced and modulated to exhibit a single-lobe pattern successfully.Furthermore,this method could inherently provide strong optical coupling and overcome the limited scalability of the weakly-coupled laser arrays.Ultimately,by leveraging self-organized phase-locking and Talbot-induced mode discrimination,our approach offers a robust platform for realizing high-power coherent laser sources with scalable integration potential.
基金Supported by the State Key Development Program for Basic Research of China under Grant No 2016YFA0301501the National Natural Science Foundation of China under Grant Nos 11504328,61475007,11334001 and 91336103
文摘We report the experimental observation of two-dimensional Talbot effect when a resonance plane wave interacts with a two-dimensional atomic density grating generated by standing wave manipulation of ultracold Bose gases. Clear self-images of the grating and sub-images with reversed phase or fractal patterns are observed. By calculating the autocorrelation functions of the images, the behavior of periodic Talbot images is studied. The Talbot effect with two-dimensional atomic density grating expands the applications of the Talbot effect in a wide variety of research fields.
基金Support from the National Natural Science Foundation of China ( Grant No. 11264007 )from the National Key Laboratory of Surface Physics in Fudan University
文摘The reflection Talbot effect under the illumination of Gaussian spherical wave and plane wave is observed on 1D and 2D photonic crystal of silicon prepared by nanosecond laser. It is found that the distance between two adjacent Talbot images increases lineally with increasing of image distance as well as amplification of Talbot images under the illumination of Gaussian spherical wave. The result of theory is coincident with that of experiment, which shows that selecting suitable wavefront shape of input field can enlarge the amplification rate and improve the resolution of Talbot imaging. The reflection Talbot effect will have a lot of good application in microscopy of micro-fabrication on silicon, such as detecting period structures of plasma on line of PLD fabricating.
