Optical Detector

Optical detectors convert incident light into measurable electrical signals. They form the sensing element in scientific instruments, defense systems, and communications infrastructure. Furthermore, they detect, quantify, and characterize light across UV, visible, and infrared wavelengths.

Photodiode detectors use a reverse-biased p-n junction. They generate photocurrent proportional to incident light intensity. Silicon photodiodes cover spectral response from 190nm to 1,100nm. InGaAs photodiodes extend detection to 1,700nm or 2,600nm on extended variants. This covers the short-wave infrared band used in fiber optic communications and laser rangefinding. Furthermore, avalanche photodiodes apply high reverse bias to achieve internal gain. They amplify signals without external amplifiers. Single-photon avalanche diodes operate above breakdown voltage. As a result, they trigger a measurable pulse from a single photon event — suited for LiDAR and fluorescence lifetime imaging.

Photomultiplier tubes detect extremely faint light through dynode amplification. A single photon releases electrons that multiply through 8 to 14 dynode stages. This produces gain factors of 10⁶ or higher. PMTs cover spectral responses from 115nm deep UV to 1,700nm. They serve scintillation detector readout in radiation monitors, Raman spectroscopy, and fluorescence microscopy. Additionally, CCD and CMOS array detectors capture spatially resolved light across millions of pixels simultaneously. These suit spectrometers and imaging systems requiring two-dimensional light field measurement.

Pyroelectric and thermopile detectors measure infrared power through thermal absorption. They cover mid-wave and long-wave infrared wavelengths that silicon photodiodes cannot reach. Moreover, these suit CO2 laser power measurement, NDIR gas sensor detection, and passive infrared motion sensing applications.

These detectors serve Pakistan’s defense electronics programs at NESCOM and SUPARCO, university physics departments in Lahore and Karachi, hospital medical laser maintenance teams, pharmaceutical spectrophotometry laboratories, and Pakistan Aeronautical Complex optical system development programs.

Tactical Supply Pakistan supplies optical detectors for defense sensing, scientific instrumentation, medical laser systems, and industrial photonics procurement across Pakistan.