skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Explore Research Products in the PAR
It may take a few hours for recently added research products to appear in PAR search results.


  • Home
  • Search Results
  • Page 1 of 2

Search for: All records

Creators/Authors contains: "Mafi, Arash"

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

  1. ; (, Frontiers in Physics)
    Nearly a decade ago, transverse Anderson localization was observed for the first time in an optical fiber with a random transverse refractive index profile. This started the development of a whole new class of optical fibers that guide light, not in a conventional core-cladding setting based on total internal reflection, but utilizing Anderson localization, where light can guide at any location across the transverse profile of the fiber. These fibers have since been used successfully in high-quality endoscopic image transport. They also show interesting nonlinear and active (lasing) properties with promising applications. This review will cover a brief history of these fibers with personal accounts of the events that led to their development in our research groups. It will then follow with recent progress and future perspectives on science and applications of these fibers. 
    more » « less
    Full Text Available 
  2. ; ; ; (, Journal of the Optical Society of America B)
    We investigate and report the optical and laser characteristics of a ytterbium-doped transverse Anderson localizing optical fiber to develop a fundamental understanding of the light propagation, generation, and amplification processes in this novel fiber. Ultimately, the goal based on the measurements and calculations conducted herein is to design and build a random fiber laser with a highly directional beam. The measurements are based on certain observations of the laser pump propagation and amplified spontaneous emission generation in this fiber. Judicious approximations are used in the propagation equations to obtain the relevant desired parameters in simple theoretical fits to experimental observations, without resorting to speculations based on the intended construction from the fiber preform. 
    more » « less
  3. ; ; ; (, Frontiers in Optics + Laser Science 2021)
    C. Mazzali, T. (Ed.)
    A detailed analysis of a novel Yb-doped silica transverse Anderson localizing optical fiber is performed. Comparisons between measurements and theory determine the parasitic attenuation, gain, saturation power, and the number of modes. 
    more » « less
    Full Text Available 
  4. ; ; ; ; ; ; ; ; ; (, Quantum 2.0 Conference and Exhibition)
    We report on SPICE circuit modeling of traveling-wave superconducting-nanowire single-photon detectors integrated with Si3N4/SiO2optical waveguides. 
    more » « less
    Full Text Available 
  5. (, Optical Fiber Technology)
    Full Text Available 
  6. ; ; ; (, Journal of Lightwave Technology)
    Full Text Available 
  7. ; ; ; ; ; (, Optics Letters)
    An all-solid transverse Anderson localizing optical fiber (TALOF) was fabricated using a novel combination of the stack-and-draw and molten core methods. Strong Anderson localization is observed in multiple regions of the fiber cross section associated with the higher index strontium aluminosilicate phases randomly arranged within a pure silica matrix. Further, to the best of our knowledge, nonlinear four-wave mixing is reported for the first time in a TALOF. 
    more » « less
  8. ; ; ; ; ; ; ; ; ; ; et al (, Proceedings of the 2021 IEEE Research and Applications of Photonics in Defense Conference (RAPID))
    We report on design, fabrication, and characterization of silicon quantum photonic integrated circuits comprising superconducting nanostripe single-photon detectors integrated with dielectric optical waveguides. In order to enhance absorption of photons by the superconducting nanostripes, the detectors are located directly on the dielectric waveguide core. 
    more » « less
    Full Text Available 
  9. ; ; (, OSA Continuum)
  10. ; ; ; ; ; ; ; ; ; ; et al (, Technical Digest, OSA Quantum 2.0 Conference)
    Raymer, Michael; Monroe, Christopher (Ed.)
    Design, fabrication, and characterization of superconducting nanostripe single-photon detectors integrated with dielectric optical waveguides is reported, whereby part of the upper cladding is removed to enhance absorption of photons by the superconducting nanostripes. 
    more » « less
    Accepted Manuscript Full Text Available