Quantum-enhanced ladar ranging with squeezed-vacuum injection, phase-sensitive amplification, and slow photodetectors

Ranjith Nair, Brent J. Yen, Jeffrey H. Shapiro, Jian Chen, Zachary Dutton, Saikat Guha, Marcus P. Da Silva

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


Theory has shown [1] that the quantum enhancements afforded by squeezed-vacuum injection (SVI) and phasesensitive amplification (PSA) can improve the spatial resolution of a soft-aperture, homodyne-detection laserradar (ladar) system. Here we show they can improve the range resolution of such a ladar system. In particular, because an experimental PSA-enhanced system is being built whose slow photodetectors imply multi-pulse integration, we develop range-measurement theory that encompasses its processing architecture. We allow the target to have an arbitrary mixture of specular and speckle components, and present computer simulation results demonstrating the range-resolution improvement that accrues from quantum enhancement with PSA.

Original languageEnglish (US)
Title of host publicationQuantum Communications and Quantum Imaging IX
StatePublished - 2011
Externally publishedYes
EventQuantum Communications and Quantum Imaging IX - San Diego, CA, United States
Duration: Aug 24 2011Aug 25 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceQuantum Communications and Quantum Imaging IX
Country/TerritoryUnited States
CitySan Diego, CA


  • Homodyne Detection
  • Ladar
  • Phase-sensitive amplification
  • Ranging
  • Squeezing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Quantum-enhanced ladar ranging with squeezed-vacuum injection, phase-sensitive amplification, and slow photodetectors'. Together they form a unique fingerprint.

Cite this