Vertical cavity surface emitting laser is a new generation of semiconductor laser that has been developing rapidly in recent years. The so-called "vertical cavity surface emission" means that the laser emission direction is perpendicular to the cleavage plane or substrate surface. Another emission method corresponding to it is called "edge emission". Traditional semiconductor l...

TEC (Thermo Electric Cooler) is a thermoelectric cooler or thermoelectric cooler. It is also called a TEC refrigeration chip because it looks like a chip device.  Semiconductor thermoelectric refrigeration technology is an energy conversion technology that uses the Peltier effect of semiconductor materials to achieve refrigeration or heating. It is widely used in optoelectron...

Near-infrared spectrometer technology principle

Polarization extinction ratio and polarization degree are both physical quantities that describe the polarization state of light, but their meanings and application scenarios are different.

Package type: There are two commonly used packages for this type of semiconductor laser tube, a "butterfly" package, which integrates a TEC temperature-controlled cooler and a thermistor. Single-mode fiber-coupled semiconductor laser tubes can usually reach an output power of several hundred mW to 1.5 W. One type is a "coaxial" package, which is commonly used in laser tubes tha...

Системы OCT во временной области (TD -) требуют SLED с хорошей спектральной формой, такой как Гаусс первого порядка, что позволяет когерентным функциям иметь хорошие характеристики подавления боковых лепестков.