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Over 252 mW Circularly Polarized Vortex Fiber Laser with Intracavity Tunable Helicity and Chirality via a High-Gain and High-Birefringent Active Fiber
ACS Photonics ( IF 6.5 ) Pub Date : 2024-08-10 , DOI: 10.1021/acsphotonics.4c01022 Yan Wu 1 , Jianxiang Wen 1 , Yinghui Lu 1 , Fengzai Tang 2 , Geoff West 2 , Yanhua Luo 1 , Fufei Pang 1 , Gang-Ding Peng 3 , Tingyun Wang 1
ACS Photonics ( IF 6.5 ) Pub Date : 2024-08-10 , DOI: 10.1021/acsphotonics.4c01022 Yan Wu 1 , Jianxiang Wen 1 , Yinghui Lu 1 , Fengzai Tang 2 , Geoff West 2 , Yanhua Luo 1 , Fufei Pang 1 , Gang-Ding Peng 3 , Tingyun Wang 1
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The orbital angular momentum (OAM) intrinsically carried by vortex beams provides additional degrees of freedom for communication and manipulation in both classical and quantum optics. Developing a tunable circularly polarized (CP)-OAM laser source could address the growing demand for high information capacity and enhance the stability of beam transmission. Traditional techniques for generating vortex beams in free space like spatial light modulators and spiral phase plates are usually affected by the diffraction effect, and it is difficult to align different optical components, limiting the practical applications of vortex beams. In this paper, we propose an all-fiber method to demonstrate an intracavity vortex-optics oscillation fiber laser with controllable chirality and helicity. Specifically, we utilize a twisted high-gain and high-birefringent active fiber to directly generate a CP-OAM beam at a telecommunication band in the laser system. Furthermore, two few-mode passive and active spun fibers are employed to maintain stable transmission and amplification of the CP OAM. The results indicate that the CP-OAM lasing emission accomplished has high power with high purity and stability. The intracavity CP-OAM oscillating laser is reported for the first time, to the best of our knowledge, and the output power is as high as 252 mW. As an all-fiber vortex source, this laser with high tunability and integration has great potential to be developed as a versatile vortex device for related applications like ultrahigh-resolution imaging, ultrahigh-precision detection, ultrafine laser processing, and quantum communications.
中文翻译：
超过 252 mW 圆偏振涡旋光纤激光器，通过高增益和高双折射有源光纤实现腔内可调谐螺旋度和手性
涡旋光束本质上携带的轨道角动量（OAM）为经典光学和量子光学中的通信和操纵提供了额外的自由度。开发可调谐圆偏振（CP）-OAM激光源可以满足对高信息容量不断增长的需求，并提高光束传输的稳定性。空间光调制器和螺旋相位板等在自由空间产生涡旋光束的传统技术通常受到衍射效应的影响，并且难以对准不同的光学元件，限制了涡旋光束的实际应用。在本文中，我们提出了一种全光纤方法来演示具有可控手性和螺旋性的腔内涡旋光学振荡光纤激光器。具体来说，我们利用扭曲的高增益和高双折射有源光纤在激光系统中直接产生电信频段的CP-OAM光束。此外，采用两根少模无源和有源旋转光纤来维持CP OAM的稳定传输和放大。结果表明，所实现的CP-OAM激光发射功率高、纯度高、稳定性好。据我们所知，腔内CP-OAM振荡激光器是首次报道，输出功率高达252 mW。作为一种全光纤涡旋源，这种具有高可调谐性和集成度的激光器具有巨大的潜力，可以开发为超高分辨率成像、超高精度检测、超精细激光加工和量子通信等相关应用的多功能涡旋器件。
更新日期：2024-08-10
中文翻译：
超过 252 mW 圆偏振涡旋光纤激光器，通过高增益和高双折射有源光纤实现腔内可调谐螺旋度和手性
涡旋光束本质上携带的轨道角动量（OAM）为经典光学和量子光学中的通信和操纵提供了额外的自由度。开发可调谐圆偏振（CP）-OAM激光源可以满足对高信息容量不断增长的需求，并提高光束传输的稳定性。空间光调制器和螺旋相位板等在自由空间产生涡旋光束的传统技术通常受到衍射效应的影响，并且难以对准不同的光学元件，限制了涡旋光束的实际应用。在本文中，我们提出了一种全光纤方法来演示具有可控手性和螺旋性的腔内涡旋光学振荡光纤激光器。具体来说，我们利用扭曲的高增益和高双折射有源光纤在激光系统中直接产生电信频段的CP-OAM光束。此外，采用两根少模无源和有源旋转光纤来维持CP OAM的稳定传输和放大。结果表明，所实现的CP-OAM激光发射功率高、纯度高、稳定性好。据我们所知，腔内CP-OAM振荡激光器是首次报道，输出功率高达252 mW。作为一种全光纤涡旋源，这种具有高可调谐性和集成度的激光器具有巨大的潜力，可以开发为超高分辨率成像、超高精度检测、超精细激光加工和量子通信等相关应用的多功能涡旋器件。
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