|
Receivers for optical fiber communications comes in many different configurations, such as:
- ROSA (Receiver Optical Sub Assembly)
- Pigtail
- Receptacle
- Metal can
- Ceramic submount
Each of these packages can contain a photodetector (either an indium gallium arsenide (InGaAs) PIN photodiode or a gallium arsenide (GaAs) PIN photodiode) and a transimpedance amplifier. The bandwidth of these devices range from 1 Gbps to 10 Gbps, while the overall speed of the photodetector depends on the terminal capacitance of the photodetector and the transimpedance amp. Photodiodes with smaller active areas have lower terminal capacitance.
Why InGaAs and GaAs PIN photodiodes?
InGaAs PIN photodiodes are generally used because they have high sensitivity at their peak wavelength of 1.55 microns, which is the wavelength most commonly used today for long-haul optical communications. By contrast, GaAs PIN photodiodes have high sensitivity at 850 nm, at which most short-haul communications take place.
|
|
Recommended products
Hamamatsu Photonics offers a wide variety of detectors for this application. To start your search, please select a category below. You will be able to further refine your search by specific criteria: package type, wavelength, bandwidth, etc.
If the parts listed on the above pages do not match the requirements of your application, then please contact us for other possible recommendations.
|
