Versatile wideband balanced detector for quantum optical homodyne tomography

R. Kumar*, E. Barrios, A. MacRae, E. Cairns, E. H. Huntington, A. I. Lvovsky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)


We present a comprehensive theory and an easy to follow method for the design and construction of a wideband homodyne detector for time-domain quantum measurements. We show how one can evaluate the performance of a detector in a specific time-domain experiment based on the electronic spectral characteristic of that detector. We then present and characterize a high-performance detector constructed using inexpensive, commercially available components such as low-noise high-speed operational amplifiers and high-bandwidth photodiodes. Our detector shows linear behavior up to a level of over 13 dB clearance between shot noise and electronic noise, in the range from DC to 100 MHz. The detector can be used for measuring quantum optical field quadratures both in the continuous-wave and pulsed regimes with standard commercial mode-locked lasers.

Original languageEnglish
Pages (from-to)5259-5267
Number of pages9
JournalOptics Communications
Issue number24
Publication statusPublished - 1 Nov 2012
Externally publishedYes


Dive into the research topics of 'Versatile wideband balanced detector for quantum optical homodyne tomography'. Together they form a unique fingerprint.

Cite this