The High Quantum Efficiency Balanced Detector is engineered for quantum optics and measurements requiring quantum-limited performance.

It incorporates high quantum efficiency photo diodes, converting nearly every incident photon to minimize optical losses and preserve quantum states. The low-noise amplification stage delivers substantial dark noise clearance, maintaining internal electronic noise well below optical vacuum noise levels across the entire operating bandwidth.

The detector demonstrates linear scaling with local oscillator (LO) power, where doubling the LO power produces a 3 dB increase in output noise power. This behavior verifies clean, shot-noise-limited scaling across a broad dynamic range.

Designed for direct integration into precision setups, the unit features calibrated RF output channels alongside an independent DC monitor port for balance verification.

The squeeze laser is a compact, table-top system designed for the generation of continuous-wave squeezed vacuum states at either 1550 nm or 1064 nm. This advanced system achieves squeezing levels of up to 10 dB in the MHz frequency regime, with the flexibility to extend the squeezing regime down to the kHz range through a dedicated locking scheme. The output is a high-quality, free-space TEM00 spatial mode, ensuring excellent beam characteristics.

The control electronics are integrated in a compact 6U rack, featuring an intuitive touch screen interface for seamless operation and monitoring of the squeeze laser.