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Reconfigurable and tunable twisted light laser.

Nan Zhou1, Jun Liu1, Jian Wang2

  • 1Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China.

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|August 1, 2018
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Summary
This summary is machine-generated.

Researchers developed a tunable laser generating twisted light with orbital angular momentum (OAM). This innovation allows flexible control over OAM modes and wavelengths, advancing optical communication and manipulation technologies.

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Area of Science:

  • Optics and Photonics
  • Laser Technology
  • Optical Communications

Background:

  • Twisted light, characterized by helical phase structure and orbital angular momentum (OAM), is crucial for advancements in optical manipulation and communication.
  • Efficient and controllable laser excitation of twisted light is highly desirable for expanding its applications.

Purpose of the Study:

  • To propose and experimentally demonstrate a novel laser system capable of reconfiguring orbital angular momentum (OAM) and tuning its wavelength.
  • To achieve high-order OAM modes in twisted light generation using a hybrid free-space and fiber platform.

Main Methods:

  • Development of a ring resonator incorporating spatial light modulators (SLMs) and a bandpass filter (BPF).
  • Utilizing SLMs to control the spatial phase patterns and adjusting the BPF for wavelength tuning.
  • Integration of free-space and fiber optics for a hybrid platform.

Main Results:

  • Successful implementation of a twisted light laser with reconfigurable OAM values ranging from -10 to +10.
  • Demonstration of wavelength tunability from 1530 to 1565 nm, covering the entire C band.
  • Favorable operational performance of the reconfigurable and tunable twisted light laser.

Conclusions:

  • The proposed hybrid laser system effectively generates twisted light with controllable OAM and wavelength.
  • This reconfigurable and tunable twisted light laser offers enhanced flexibility and robustness for future OAM-enabled applications.
  • Opens new avenues for advanced optical manipulation and communication systems.