Just Detecting a Signal Is No Longer Sufficient
At low signal levels, the question is no longer detection. It is distinction.
In semiconductor inspection and metrology systems, lower optical signal levels make it harder to separate true process variation from thermal noise, shot noise, and drift. As measurements approach the noise floor, resolution, repeatability, and confidence in the data all become harder to maintain.
For engineering teams building inspection tools, alignment systems, and low-light measurement platforms, detector stability is not a secondary specification. It directly affects system performance.
Thermoelectrically cooled photodiodes from GPD Optoelectronics support demanding low-signal applications with:
- Lower effective noise floor
- Improved signal stability over time
- More reliable operation near detection limits
When systems operate close to their measurement limits, noise determines what remains visible.
About GPD Optoelectronics
Founded in 1973, GPD Optoelectronics began by making high-quality germanium transistors, but since the early 1980s the company manufactures both germanium and indium gallium arsenide photodiodes and multi-element photodetectors. In addition to offering a variety of off-the-shelf products, GPD specializes in providing customized parts that are uniquely tailored to customer applications. GPD has the agility to design and deliver prototypes of custom products often within just a few weeks.
GPD’s products include:
- Photodiodes
- Position sensing photodiodes
- Specialty photodiodes
- Packaging Options
- Multi-Cell Photoreceiver (MCPR) Development Kits
To request more information or a quotation for these or other GPD products, contact IL Photonics.