Controllable customization of optical vortex lattices with coherent laser array

Long, Jinhu; Chen, Xiao; Chang, Qi; Hou, Tianyue; Deng, Yu; Zhang, Jiayi; Su, Rongtao; Ma, Yanxing; Ma, Pengfei; Zhang, Pu

doi:10.1016/j.optlastec.2022.109045

Cited by 5 publications

(4 citation statements)

References 68 publications

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“…Because the equivalent lateral displacement of the OPA in the source plane was increased, it resulted in the spread of the OAM spectrum [46,58] . As a result, the generated OAM beam could be transformed into an OAM beam array [45,46] . As an example, we shifted the phase of the OPA with a TC of −1.…”

Section: Results Of Emitting the Oam Beammentioning

confidence: 99%

“…One can find that there were multiple OAM beams with several phase singularities arranged in a hexagonal pattern. Because the newly generated OAM beams had the same phase singularities and OAM modes, they could be called the OAM beam copier [46,59] . Compared to a single OAM beam with an isolated phase singularity, the generated OAM beam array had an OAM network with several phase singularities, which has a promising application in various fields, such as optical tweezers [10,11] and quantum information processing [59] .…”

Section: Results Of Emitting the Oam Beammentioning

confidence: 99%

“…The technique of generating the OAM beam with an OPA via the CBC technique has been significantly investigated [36,37,[42][43][44][45] . Both a single OAM beam and the OAM beam array could be generated effectively with the OPA [46] . Especially, researchers have presented the high-power OAM generation with 61 femtosecond fiber amplifiers [36] .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-power mode-programmable orbital angular momentum beam emitter with an internally sensed optical phased array

Long,

Deng,

Gao

et al. 2024

中国光学快报

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The high-power mode-programmable orbital angular momentum (OAM) beam has attracted significant attention in a wide range of applications, such as long-distance optical communication, nonlinear frequency conversion, and beam shaping. Coherent beam combining (CBC) of an optical phased array (OPA) can offer a promising solution for both generating the high-power OAM beam and rapidly switching the OAM modes. However, achieving real-time phase noise locking and formation of desired phase structures in a high-power CBC system faces significant challenges. Here, an internal phase-sensing technique was utilized to generate the high-power OAM beam, which effectively mitigated thermal effects and eliminated the need for large optical devices. An OPA with six elements was employed for experimental demonstration. The first effective generation of over 1.5 kW mode-programmable OAM beam in a continuous-wave domain was presented. Moreover, the results demonstrated that the generated OAM beam could be modulated with multiple dimensions. The topological charge can be switched in real time from −1 to −2. Notably, this OAM beam emitter could function as an OAM beam copier by easily transforming a single OAM beam into an OAM beam array. More importantly, a comprehensive analysis was conducted on power scaling, mode switching speed, and expansion of OAM modes. Additionally, the system's compact design enabled it to function as a packageable OAM beam emitter. Owing to the advantages of having high power and programmable modes with multiple dimension modulation in phase structures and intensity distribution, this work can pave the way for producing high-power structured light beams and advancing their applications.

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Section: Results Of Emitting the Oam Beammentioning

confidence: 99%

Section: Results Of Emitting the Oam Beammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-power mode-programmable orbital angular momentum beam emitter with an internally sensed optical phased array

Long,

Deng,

Gao

et al. 2024

中国光学快报

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“…As we know, coherent beam combining (CBC) technology has been rapidly developed for light field modulation due to its abundant modulable dimensions, for example, amplitude, phase, polarization, etc. [16][17][18]. Note that most indexes of structured light generated by coherent beam arrays (CBAs) have been greatly improved recently.…”

Section: Introductionmentioning

confidence: 99%

Flexible Modulation of Perfect Vortex Beams by Combining Coherent Beams

Shu,

Zhang,

Chang

et al. 2024

Photonics

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Perfect vortex beams (PVBs) possess the advantage of a stable light field distribution regardless of their topological charges, and thus they are extensively utilized in various applications, such as free-space optical communication, optical tweezers and laser processing. Herein, we report a new strategy to generate and modulate PVBs using coherent beam combining (CBC) technology. Both piston phase and tilting phase controlling methods have been successfully employed, and the corresponding properties of the generated PVBs have been fully investigated. Moreover, the number and position of the gaps in fractional perfect vortex beams (FPVBs) could be precisely controlled, and the relationships between these modulated parameters and the performance of FPVBs are uncovered. These simulation analysis results demonstrate the potential for flexible modulation of PVBs or FPVBs in the CBC system, indicating promising prospects for coherent beam arrays (CBAs) in laser beam shaping and achieving high-power structured light.

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