Abstract

Previously, space–time wave packets (STWPs) have been generated in free space with reduced diffraction and a tunable group velocity by combining multiple frequency comb lines each carrying a single Bessel mode with a unique wave number. It might be potentially desirable to propagate the STWP through fiber for reconfigurable positioning. However, fiber mode coupling might degrade the output STWP and distort its propagation characteristics. In this Letter, we experimentally demonstrate STWP generation and propagation over 1-m graded-index multi-mode fiber. Fiber mode coupling is mitigated by pre-distortion according to the inverse matrix of the fiber mode coupling matrix. Measurement of the STWP at the fiber output shows that its group velocity can vary from 1.0042c to 0.9967c by tuning the wave number of the Bessel mode on each frequency. The measured time-averaged intensity profiles show that the beam radius remains similar after 150-mm free-space propagation after exiting the fiber.

© 2023 Optica Publishing Group

Space-time wave packets with both arbitrary transverse and longitudinal accelerations

Zehong Liang, Yejin Liu, Yingjun Luo, Hechong Chen, and Dongmei Deng
Opt. Lett. 48(10) 2543-2546 (2023)

Ultra-compact synthesis of space-time wave packets

Murat Yessenov, Oussama Mhibik, Lam Mach, Tina M. Hayward, Rajesh Menon, Leonid Glebov, Ivan Divliansky, and Ayman F. Abouraddy
Opt. Lett. 48(10) 2500-2503 (2023)

Vector space-time wave packets

Murat Yessenov, Zhaozhong Chen, Martin P. J. Lavery, and Ayman F. Abouraddy
Opt. Lett. 47(16) 4131-4134 (2022)

Synthesis of near-diffraction-free orbital-angular-momentum space-time wave packets having a controllable group velocity using a frequency comb

Kai Pang, Kaiheng Zou, Hao Song, Maxim Karpov, Murat Yessenov, Zhe Zhao, Amir Minoofar, Runzhou Zhang, Haoqian Song, Huibin Zhou, Xinzhou Su, Nanzhe Hu, Tobias J. Kippenberg, Ayman F. Abouraddy, Moshe Tur, and Alan E. Willner
Opt. Express 30(10) 16712-16724 (2022)

Broadband space-time wave packets propagating 70  m

Basanta Bhaduri, Murat Yessenov, Danielle Reyes, Jessica Pena, Monjurul Meem, Shermineh Rostami Fairchild, Rajesh Menon, Martin Richardson, and Ayman F. Abouraddy
Opt. Lett. 44(8) 2073-2076 (2019)