Phase locking of multiple optical fiber channels for a slow-light-enabled laser radar system.


Journal Article

Phase control is crucial to the operation of coherent beam combining systems, whether for laser radar or high-power beam combining. We have recently demonstrated a design for a multi-aperture, coherently combined, synchronized- and phased-array slow light laser radar (SLIDAR) that is capable of scanning in two dimensions with dynamic group delay compensation. Here we describe in detail the optical phase locking system used in the design. The phase locking system achieves an estimated Strehl ratio of 0.8, and signals from multiple emitting apertures are phase locked simultaneously to within π/5 radians (1/10 wave) after propagation through 2.2 km of single-mode fiber per channel. Phase locking performance is maintained even as two independent slow light mechanisms are utilized simultaneously.

Full Text

Cited Authors

  • Vornehm, JE; Schweinsberg, A; Shi, Z; Gauthier, DJ; Boyd, RW

Published Date

  • June 2013

Published In

Volume / Issue

  • 21 / 11

Start / End Page

  • 13094 - 13104

PubMed ID

  • 23736563

Pubmed Central ID

  • 23736563

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.21.013094


  • eng