Quantum-state engineering using nonlinear optical Sagnac loops

Jun Chen*, Joseph B. Altepeter, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The Kerr nonlinearity of an optical-fibre Sagnac loop can be utilized to engineer a variety of two-photon quantum states. These include correlated, identical photon pairs as well as degenerate, maximally entangled states - both of which are used in quantum information processing. In fact, their underlying principle - the reverse Hong-Ou-Mandel effect - can also be applied to free-space, down-conversion-based analogues of either identical or entangled photon-pair sources. Due to their simple structure, such versatile devices are expected to find widespread applications in quantum-state engineering.

Original languageEnglish (US)
Article number123019
JournalNew Journal of Physics
StatePublished - Dec 16 2008

ASJC Scopus subject areas

  • General Physics and Astronomy


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