The time-domain balanced homodyne detector (TBHD) is critical component in continuous-variable quantum key distribution (CVQKD). shot-noise-limited attribute of a TBHD depends on the whole frequency spectrum detector, contrast to frequency-domain that focuses only part spectrum. We propose method for accurate calibration by overlapping gain lines and an integral photodetector which realized blo...

In an infrared photodetector, noise current (dark current) is generated throughout the volume of detector. Reducing will reduce dark current, but corresponding smaller area also received signal. By using a separate antenna to receive light, one can detector without reducing signal, thereby increasing its signal ratio (SNR). Here, we present dielectric resonator (DRA) coupled photodetector. Its ...

An opto-electronic receiver (detector and pre-amplifier) necessary to meet the demands of high capacity deep-space missions is designed for a Mars–Earth optical communication link. The receiver requirements are driven by link performance (data rate, bit-error rate, and margin), delivered power, pulse width, background signal, telescope quality, and atmospheric effects. Meeting these requirement...

The aim of this study was to evaluate the production of dried fruits and juices from chokeberry as potential sources of bioactive compounds with beneficial effects on human health. Dry powders and juices from chokeberry were analyzed for the contents of sugars with high-performance liquid chromatography coupled with an evaporative light scattering detector (HPLC-ELSD method), and the antioxidan...

This paper presents a dark current suppression technique for a light detector in a variable-temperature system. The light detector architecture comprises a photodiode for sensing the ambient light, a dark current diode for conducting dark current suppression, and a current subtractor that is embedded in the current amplifier with enhanced dark current cancellation. The measured dark current of ...

A CMOS SSPM coupled to a scintillation crystal uses an array of CMOS Geiger-mode avalanche photodiode (GPD) pixels to collect light and produce a signal proportional to the energy of the radiation. Each pixel acts as a binary photon detector, but the summed output is an analog representation of the total photon intensity. We have fabricated arrays of GPD pixels in a CMOS environment, which make...

An economical fluorescence detector was developed with an LED as the exciting source and a low-cost avalanche photodiode (APD) module as a photon sensor. The detector was arranged in an epifluorescence configuration using a microscope objective (20× or 40×) and a dichroic mirror. The low-cost APD was biased by a direct current (DC) high voltage power supply at 121 V, which is much lower than th...

Adv. Opt. Mater. 2021, 18, 2001546 DOI: 10.1002/adom.202001546 In the originally published article, specific detectivity data was inaccurately calculated based on assumption of an ideal diode, which is not always valid. The photodetector by Equation (6) page 5. term r0 represents dynamic resistance. It should be obtained from derivative (dI/dV)−1 experimental I–V data. improper calculation lead...