Spatiotemporal Dynamics of Optical Pulse Propagation in Multimode Fibers

Location: 
Mann Engineer Student Center - Room 107 (located in Dunham Lab – 10 Hillhouse Ave) See map
10 Hillhouse Avenue
New Haven, CT 06511

Solid State & Optics Seminar Series

sponsored by “The Flint Fund Series on Quantum Devices and Nanostructures”

Wednesday, September 18, 2019

1:00pm

Mann Engineer Student Center - Room 107

(located in Dunham Lab – 10 Hillhouse Ave)

Frank Wise

School of Applied and Engineering Physics, Cornell University

Spatiotemporal Dynamics of Optical Pulse Propagation in Multimode Fibers

Optical fibers designed to support multiple transverse modes offer opportunities to study wave propagation in a setting that is intermediate between single-mode fiber and free-space propagation.

A variety of qualitatively-new phenomena have been observed recently in multimode fibers. Self-cleaning of a multimode beam is observed at a fraction of the critical power for self-focusing, and without loss [1,2]. New instabilities, which are spatiotemporal in nature, occur [3,4,5]. By varying the launched spatial modes, it is possible to generate dispersive waves over an octave in frequency, megawatt pulses in the near infrared, or continua that span multiple octaves [6]. After a tutorial introduction to nonlinear wave propagation, one or two of these phenomena will be presented. Interpretation of the phenomena in terms of the dynamics of multimode solitons can be quite insightful. 

Synchronization of transverse and longitudinal modes – spatiotemporal mode-locking – of a multimode fiber laser was recently demonstrated [7]. The basic features of spatiotemporal mode-locking and recent progress in theoretical understanding will be presented. The variety of 3-dimensional lasing states appears to open many opportunities for future study.

 
 
  1. Opt. Lett. 41, 2553 (2016)
  2. Nature Photon. 11, 237 (2017)
  3. Phys. Rev. Lett. 115, 223902 (2015)
  4. Phys. Rev. Lett. 116, 183901 (2016)
  5. Nature Photon. 10, 771 (2016)
  6. Nature Photon. 9, 306 (2015)
  7. Science 358, 94 (2017)

Frank Wise received a BS in Engineering Physics from Princeton University, an MS in Electrical Engineering from the University of California at Berkeley, and a PhD in Applied Physics from Cornell University. Before PhD studies, he worked on advanced integrated circuits at Bell Laboratories.  Since receiving the PhD in 1988, he has been on the faculty in Applied Physics at Cornell. His group has efforts in nonlinear optical pulse propagation and semiconductor nanostructures.

Host: Prof. Hui Cao

Solid State & Optics Seminar Series

sponsored by “The Flint Fund Series on Quantum Devices and Nanostructures”

Wednesday, September 18, 2019

1:00pm

Mann Engineer Student Center - Room 107

(located in Dunham Lab – 10 Hillhouse Ave)

Frank Wise

School of Applied and Engineering Physics, Cornell University

Spatiotemporal Dynamics of Optical Pulse Propagation in Multimode Fibers

Optical fibers designed to support multiple transverse modes offer opportunities to study wave propagation in a setting that is intermediate between single-mode fiber and free-space propagation.

A variety of qualitatively-new phenomena have been observed recently in multimode fibers. Self-cleaning of a multimode beam is observed at a fraction of the critical power for self-focusing, and without loss [1,2]. New instabilities, which are spatiotemporal in nature, occur [3,4,5]. By varying the launched spatial modes, it is possible to generate dispersive waves over an octave in frequency, megawatt pulses in the near infrared, or continua that span multiple octaves [6]. After a tutorial introduction to nonlinear wave propagation, one or two of these phenomena will be presented. Interpretation of the phenomena in terms of the dynamics of multimode solitons can be quite insightful. 

Synchronization of transverse and longitudinal modes – spatiotemporal mode-locking – of a multimode fiber laser was recently demonstrated [7]. The basic features of spatiotemporal mode-locking and recent progress in theoretical understanding will be presented. The variety of 3-dimensional lasing states appears to open many opportunities for future study.

 
 
  1. Opt. Lett. 41, 2553 (2016)
  2. Nature Photon. 11, 237 (2017)
  3. Phys. Rev. Lett. 115, 223902 (2015)
  4. Phys. Rev. Lett. 116, 183901 (2016)
  5. Nature Photon. 10, 771 (2016)
  6. Nature Photon. 9, 306 (2015)
  7. Science 358, 94 (2017)

Frank Wise received a BS in Engineering Physics from Princeton University, an MS in Electrical Engineering from the University of California at Berkeley, and a PhD in Applied Physics from Cornell University. Before PhD studies, he worked on advanced integrated circuits at Bell Laboratories.  Since receiving the PhD in 1988, he has been on the faculty in Applied Physics at Cornell. His group has efforts in nonlinear optical pulse propagation and semiconductor nanostructures.

Host: Prof. Hui Cao

Event time: 
Wednesday, September 18, 2019 - 1:00pm
Sponsor: 
The Flint Fund Series on Quantum Devices and Nanostructures”
Presented By: 
Frank Wise
Department: 
School of Applied and Engineering Physics, Cornell University
Hosted By: 
Prof. Hui Cao