Sequence-coded coherent laser ranging with high detection sensitivity

Keren Shemer, Gil Bashan, H. Hagai Diamandi, Yosef London, Tzur Raanan, Yochai Israelashvili, Alon Charny, Itzik Cohen, Arik Bergman, Nadav Levanon, Avi Zadok

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The compression of extended, coded sequences allows for laser ranging measurements with low peak power levels. Previous realizations of this approach were restricted by additive noise of direct, incoherent detection. In this work we bring together pulse sequence coding and optical coherent detection to achieve very high sensitivity. Collected sequences with an overall energy equivalent to only 800 photons are successfully compressed. The observed sensitivity agrees with analytic predictions. Compared with incoherent detection, measurement durations are reduced by four orders of magnitude. The protocol is suitable for laser ranging over tens of kilometers, depending on atmospheric conditions.

Original languageEnglish
Pages (from-to)1274-1282
Number of pages9
JournalOSA Continuum
Issue number5
StatePublished - 15 May 2020
Externally publishedYes


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