Keeping Laser Communication Links Precisely Aligned
Optical communication between satellites—often referred to as Free-Space Optical (FSO) or laser communication (Lasercom)—depends on extremely precise beam alignment. Even the smallest pointing error can disrupt a link between platforms tens of kilometers apart moving at thousands of kilometers per hour.
To maintain these connections, optical terminals rely on Pointing, Acquisition, and Tracking (PAT) systems that continuously monitor beam position and adjust alignment in real time.
Quadrant and lateral effect position sensors from GPD Optoelectronics provide the high-precision feedback these tracking systems depend on.
These sensors help engineers:
- Measure beam displacement in real time
- Enable closed-loop alignment control
- Maintain stable laser communication links
As optical satellite networks expand, beam tracking accuracy becomes even more critical to system performance.
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 sensors
- Avalanche photodiodes – InGaAs APDs
- Specialty products
To request more information or a quotation for these or other GPD products, contact IL Photonics.