Measuring quantum states of light, such as squeezed states, presents unique challenges: it demands both very low electronic noise and very high quantum efficiency. Our quantum-optimized photodetectors are designed specifically to meet them, making them ideal for measurements such as:
The detectors on this page offer the lowest noise-equivalent power and highest quantum efficiency of any commercially available detectors we know of — at a highly competitive price.
The first step when ordering a photodetector is selecting the photodiode(s), a choice usually driven by quantum efficiency. The figure on the right shows our wide selection of standard PIN photodiodes. These standard diodes strike an excellent balance between cost and performance, delivering QE > 92% across the entire visible and near-infrared spectrum — enough to measure more than 10 dB of squeezing. Use the tool below to find the best standard photodiode for your wavelength. For the highest possible efficiency, custom photodiodes are available on request (these require a quote).
Use this tool to identify which photodiode offers the highest quantum efficiency at your wavelength of interest.
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output voltage range | ±5 | V | 50 Ohm load |
| Output impedance | 50 | Ohms |
Once a photodiode is selected, we will integrate these into one of our detectors. The table below gives the performance specifications of our balanced transimpedance amplifier.
Note: Most photodiodes do not add any cost to the final price, with the exceptions being: PIN1900, PIN4600, PIN1060, and PIN1550. For these diodes, a quote is required.
Tell us your wavelength, bandwidth, and what you are measuring. We will recommend a standard detector or quote a custom build — usually within 1–2 business days.