What are the bandwidth and responsivity of the InGaAs photodiode?
The photodiode has a responsivity of 0.35 A/W at room temperature at 2 μm, and a 3 dB bandwidth of 3.7 GHz.
What is a responsivity of photodiode?
The responsivity (or radiant sensitivity) of a photodiode or some other kind of photodetector is the ratio of generated photocurrent and incident (or sometimes absorbed) optical power (neglecting noise influences), determined in the linear region of response.
What is InGaAs photodiode?
InGaAs photodiodes for near-infrared light detection. Features include high speed, high sensitivity, low noise, and spectral responses ranging from 0.5 μm to 2.6 μm. Suitable for a wide range of applications including optical communication, analysis, and measurement.
What extended InGaAs?
Standard InGaAs has a long wavelength cutoff of 1.68 µm. Many applications require the detection of light with longer wavelengths. LIDAR systems often use lasers that emit light with a wavelength of 2.05 µm. InxGa1-xAs with a longer cutoff is called “extended wavelength InGaAs.”
What is bandwidth of photodiode?
Bandwidth is defined as 0.35 / τ. A minimum of 10V reverse bias is necessary for this application. Note that a bias larger than the photodiode maximum reverse voltage should not be applied.
How is photodiode responsivity measured?
You can measure the responsivity of a silicon photodiode by illuminating the device with a known amount of laser power and then measuring the output voltage developed across a bias resistor. You must first characterize the light sources you will use by measuring the power in the beams.
What are responsivity issues?
Several potential responsivity characteristics have been discussed in the literature and include gender, depression, low self-esteem, history of sexual abuse, low intelligence, and personality (see Bonta, 1995; Kennedy & Serin, 1997; Listwan, Sperber, Spruance, & Van Voorhis, 2004; Van Voorhis, 1997).
What is InGaAs sensor?
InGaAs sensors are used for applications in physical and life science that require high sensitivity over the 900-1700 nm wavelength range, referred to as shortwave infrared (SWIR). Some InGaAs sensors are able to measure up to 2500 nm due to changes in material composition.
Is InGaAs a semiconductor?
InGaAs is a room-temperature semiconductor with applications in electronics and photonics. The principal importance of GaInAs is its application as a high-speed, high sensitivity photodetector of choice for optical fiber telecommunications.
What is an InGaAs detector?
What are the factors that limit the speed of response of a photodiode?
There are basically three limiting factors to the speed of a photodetector: diffusion of carriers, drift transit time in the depletion region, and capacitance of the depletion region. The slowest of the three processes is the diffusion of carriers to the high-electric field depletion region from outside that region.