The Doubly Resonant, Travelling-Wave Squeezed Light Source

Peter Kürz, R. Paschotta, T. Müllet +3 more

Colin F. McCormick, Vincent Boyer, E. Arimondo +1 more

Xinyi Ren, Reshma Kopparapu, Tushar Sanjay Karnik +11 more

We demonstrate a 1.587-µm continuous-wave squeezed-light source, achieving −0.8 dB measured squeezing (−7.5 dB inferred) at 27 mW pump power using a quasi-phase-matched, doubly resonant thin-film lithium niobate microresonator with > 90% escape efficiency.

E. Giacobino

Toshiaki Suhara, M. Fujimura, Kenji Kintaka +3 more

Theoretical analysis of squeezed light generation by phasematched SHG, applicable generally to various SHG configurations and appropriate for mutual comparison, is presented. The analysis is based on analytical solutions of the linearized differential equations in space coordinate and the input-output equations for the amplitude fluctuations, and calculations of squeezing spectra using the covariance matrixes. Formulations describing the squeezing characteristics in terms of the device parameters are derived. Typical numerical results are also given to illustrate the features of traveling-wave SHG, singly-resonant SHG, and doubly-resonant SHG configurations including cases where propagation losses are involved. The results, which are consistent with those in previous work, provide many insights for design and application of SHG devices for squeezed-light generation.

M. D. Reid, Alistair S. Lane, Daniel F. Walls