English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Strongly squeezed light at telecommunication wavelengths is the necessaryresource for one-sided device-independent quantum key distribution via fibrenetworks. Reducing the optical pump power that is required for its generationwill advance this quantum technology towards efficient out-of-laboratoryoperation. Here, we investigate the second-harmonic pump power requirement forparametric generation of continuous-wave squeezed vacuum states at 1550nm in astate-of-the-art doubly-resonant standing-wave PPKTP cavity setup. We usecoarse adjustment of the Gouy phase via the cavity length together withtemperature fine-tuning for simultaneously achieving double resonance and(quasi) phase matching, and observe a squeeze factor of 13dB at 1550nm fromjust 12mW external pump power at 775nm. We anticipate that optimizing thecavity coupler reflectivity will reduce the external pump power to 3mW, withoutreducing the squeeze factor.

13dB Squeezed Vacuum States at 1550nm from 12mW external pump power at 775nm