Vertical Cavity Surface Emitting Lasers (VCSELs) are a type of semiconductor laser diodes. Unlike edge emitting laser diodes, VCSELs emit upwards and thus can be easily packaged as emitter arrays containing hundreds of emitters on a single chip. Other characteristics of VCSELs:
- Wavelength range: 650nm-1080nm, 1550nm.
- Power range: mW to Watts
- High modulation bandwidth
VCSELs were first used in the telecom industry, and today are widely used as light sources in sensing applications. Low power (mW) applications include face and gesture recognition, proximity sensors, augmented reality displays. High power (Watts) applications include LIDARs for robotics, UAVs and autonomous vehicles. These new applications run on batteries and will need to minimize power consumption. Therefore characterization of VCSEL power, beam profile, noise, etc. is critical.
Often VCSELs are coupled with passive optics or scanning optics which generate very wide beams. Additionally, VCSELs are often used in pulsed mode. These factors make VCSEL test and measurement a challenging task. Ophir offers the right tools for this task.
Power, energy and irradiance measurement solutions
- Integrating spheres
- Thermopile power and energy sensors
- Irradiance sensors
Beam profiling solutions
- Camera and scanning slit beam profiles
- Solutions for near field, far field, and angular distribution beam profiling
Temporal characterization of pulse shape and noise
- Fast photodiode detectors
- Ophir offers customized solutions for OEM customers.
Vertical Cavity Surface Emitting Lasers (VCSELs) are a type of semiconductor laser diode. Unlike edge emitting laser diodes, VCSELs emit upwards and thus can be easily packaged as emitter arrays containing hundreds of emitters on a single chip. Read more >
This document describes the inherent problems involved with measuring average power for low frequency pulsed laser sources, and describes the new "Low Freq. Power Mode" being offered on many Ophir devices and meters to solve these problems. It describes how to use the new mode and mentions some tips for obtaining best results. Read more >
They're used in phones, printers and other devices for a variety of applications. But measuring their power to ensure best performance can be difficult. Read more >
When measuring average power using a photodiode detector such as PD300 or IS6-D-VIS, the maximum power or saturation power is determined by the maximal photocurrent that the photodiode can generate while still maintaining linearity. Read more >
Power, energy, irradiance measurement
Reference to beam profiler wizard https://www.ophiropt.com/laser--measurement/beam-profiler-wizard