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>vwinchina德赢>项目创造更强大,丰富的超快激光脉冲:光学研究组记录了最短的激光脉冲新开发的技术,即在工程和生物医学重要的应用工作研究所

在stretched-pulse孤子克尔谐振器产品开发loped by the lab of William Renninger, a single frequency laser enters a fiber ring cavity, generating a broad bandwidth comb of frequencies at the output that supports ultrashort femtosecond pulses. Inside the fiber cavity the pulses stretch and compress in time, reaching a minimum duration twice in the cavity near the center of each of the two fiber sections. The stretching and compressing temporal evolution is a salient characteristic of femtosecond stretched-pulse soliton Kerr resonators.  CREDIT Illustration by Michael Osadciw/University of Rochester
在stretched-pulse孤子克尔谐振器产品开发loped by the lab of William Renninger, a single frequency laser enters a fiber ring cavity, generating a broad bandwidth comb of frequencies at the output that supports ultrashort femtosecond pulses. Inside the fiber cavity the pulses stretch and compress in time, reaching a minimum duration twice in the cavity near the center of each of the two fiber sections. The stretching and compressing temporal evolution is a salient characteristic of femtosecond stretched-pulse soliton Kerr resonators. CREDIT Illustration by Michael Osadciw/University of Rochester

Abstract:
University of Rochester researchers are setting a new standard when it comes to producing ultrafast laser pulses over a broader range of wavelengths than traditional laser sources.

Project creates more powerful, versatile ultrafast laser pulse: Institute of Optics research sets record for shortest laser pulse for newly developed technology, work that has important applications in engineering and biomedicine

罗切斯特,纽约|发表于2020年7月24日

In work published in Physical Review Letters, William Renninger, an assistant professor of optics, along with members of his lab, describe a new device, called the "stretched-pulse soliton Kerr resonator," that enhances the performance of ultrafast laser pulses. The work has important implications for a range of engineering and biomedical applications, including spectroscopy, frequency synthesis, distance ranging, pulse generation, and others.

该装置会创建一个超快激光脉冲 - 飞秒量级,或第二的一个千万亿 - 什么激光科学家称之为激光增益 - - 这是从特有激光光源的光的物理极限和释放的极限源的波长。vwin徳赢官网

"Simply put, this is the shortest pulse ever from a gain-free fiber source," Renninger says.

谢伦宁格和他的团队研究的研究生和博士后同伙在克尔谐振器,用于生成已经大量研究的课题飞秒激光脉冲一个令人兴奋的新的替代改进。

短突发或一个波的局部包络 - - 保持其形状,同时以恒定的速度传播通过实验室发现新孤子克服在克尔谐振器的其他版本的脉冲持续时间的一个挑战。vwin徳赢官网在伦宁格的装置中产生的孤子从其他克尔谐振器的孤子不同,特别是在他们创建的拉伸脉冲的形状和行为。

“这是稳定其不断重复同样的事情,一遍又一遍,越来越长,那么短,长则较短的意义上说,”谢伦宁格说。

The pulses "feature a broad spectral bandwidth and a compressed pulse duration of 210 femtoseconds, which is the shortest pulse duration observed to date from fiber Kerr resonators," the researchers state in the paper.

主要作者薛东是在谢伦宁格实验室研究生研究助理。除了谢伦宁格,其他的合作者是杨倩和克里斯托弗Spiess,在实验室里也研究生研究助理,和Victor Bucklew,在实验室担任博士后。

这项研究是由该大学的科技发展基金,大学研究奖,部分由美国国立卫生研究院资助。甲专利未决。有意者可以联系柯蒂斯布罗德本特,在URVentures授权管理,对技术授权。

使超快激光器更容易

Renninger, an expert in creating sources for femtosecond lasers, received his BS and PhD degrees in applied physics from Cornell University. Before joining the Institute of Optics, he was a postdoctoral associate and an associate research scientist in the Department of Applied Physics at Yale University.

He recently received a National Science Foundation CAREER award, which includes funding to create open source access to information for designing and creating advanced lasers sources generating femtosecond pulses.

“现在有商业产品,但他们是非常昂贵的。他们望而却步许多研究小组预算有限的设备,”谢伦宁格说。

Much of the cost is for expertise, not components, so his group will use part of the CAREER funding to provide consulting for research groups at smaller universities in how to design and build femtosecond lasers for basic research.

“最终的目标是让我们的网站上为大家公布了设计指南,”谢伦宁格说。

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