Quantum Light Sources

Integrated CV Squeezer

On-chip squeezed light generation via χ⁽²⁾ OPA and χ⁽³⁾ Kerr nonlinearities

Silicon Nitride (SiN) microrings & Thin-Film Lithium Niobate (TFLN) waveguides

10+ dB
Max Squeezing (TFLN)
10⁶
Ring Q-Factor
75%
System Efficiency
~40 mW
Pump Power

Platform Comparison

SiN Kerr Microring

χ⁽³⁾ Four-Wave Mixing

  • CMOS-compatible fabrication
  • High Q-factors (>10⁶)
  • Thermo-optic tuning
  • Lower squeezing (3-10 dB)
Typical Squeezing
3-10 dB

TFLN OPA

χ⁽²⁾ Parametric Amplification

  • Stronger nonlinearity
  • Lower pump power
  • Electro-optic tuning
  • Higher squeezing (10-15+ dB)
Typical Squeezing
10-15+ dB

Interactive Tools

Explore squeezed light generation with our interactive simulators

Physics Foundation

Output Squeezing Spectrum

Sout(Ω) = 1 - ηesc × 4Gκ² / [(κ+Γ)² + Ω²]

Where ηesc = κext/κ is escape efficiency, G is parametric gain, κ is total cavity decay rate, and Ω is measurement frequency.

Detected Squeezing

Vdet = ηtot × Von-chip + (1 - ηtot)

Detected variance includes system efficiency ηtot mixing squeezed light with vacuum noise from losses.

Kerr (χ⁽³⁾) Squeezing

Four-Wave Mixing:p → ωs + ωi

Threshold: Pth ∝ V²/Q²n₂

Key: High Q-factor (>10⁶) required for sufficient gain

OPA (χ⁽²⁾) Squeezing

Parametric Down-Conversion: ωp → ωs + ωi

Gain: G = sinh²(gL) where g ∝ deff√P

Key: Phase matching critical for efficiency

Documentation

Applications

Gravitational Wave Detection

LIGO-type interferometers use squeezed light to surpass quantum shot noise limits.

CV-QKD Sources

Squeezed states enable enhanced security and extended range in quantum key distribution.

Precision Metrology

Sub-shot-noise sensing for biological imaging, magnetometry, and spectroscopy.