Photonics

Lifetime strongly depends on temperature of storage and temperature of operation. At normal temperatures lifetime exceed 5 years but many customers are using detectors for more than 10 years in [...]

There is a possibility to cool it down to liquid helium temperature. As for the opposite side, we can heat it up to 200°C what makes it convenient for some of the applications. Source (with [...]

Our supplier VIGO offers thermoelectrically cooled detectors which are typically provided with: 3° wedged Al2O3 windows (wAl2O3) 3° wedged ZnSe AR coated windows (wZnSeAR) 3° wedge prevents [...]

Parameter /Cooling -2TE -3TE -4TE Tdet [K] ~230 ~210 ~195 Vmax [V] 1.3 3.6 8.3 Imax [A] 1.2 0.45 0.5 Qmax [W] 0.36 0.27 0.28 ΔTmax [K] 92 114 125 Source (with permission to [...]

Operation of thermoelectric coolers is based on Peltier effect. Two-, three- and four-staged thermoelectric cooler are available. TEC is biased with DC current supply. The parameters of TEC [...]

Optical immersion is achieved by using high refractive index microlenses in order to improve performance of the devices but may limit acceptance angle. Optical immersion is a monolithic [...]

Photoconductive Devices (PC) are detectors based on the photoconductive effect. Infrared radiation generates charge carriers in the semiconductor active region decreasing its resistance. The [...]

The load resistor value should be selected to match the detector dark resistance. Source (with permission to reproduce): http://optodiode.com/resources.html

For our testing, we use a voltage divider bias circuit with a load resistor set at either 1 Megohm or set at a resistance equal to the dark resistance of the detector. The opamp can be nearly [...]

The detector has a 1/f noise characteristic, so the lower frequencies have higher noise and consequently a lower D* value. The signal level stays relatively constant as the chopping frequency is [...]