The LBTEK fiber-type balanced photodetector series covers two types: Silicon (Si) and InGaAs, providing FC/APC fiber input interface, with 3 SMA electrical connection output ports (RF OUT, MONITOR+, MONITOR-). It provides two output coupling modes: DC coupling and AC coupling, suitable for different application scenarios. AC coupling shields the continuous wave component (i.e., the unmodulated part) of the optical input signal. Therefore, if a relatively weak frequency-modulated signal needs to be measured while it is under a strong continuous wave background signal, AC coupling detectors can be selected. The detector housing has one M4 threaded mounting hole on the side, suitable for universal mounting. Each balanced photodetector comes with a 12V linear power supply.

LBTEK's fiber-coupled balanced photodetector series includes two types: Silicon (Si) and Indium Gallium Arsenide (InGaAs), with 5 adjustable gain levels to meet photodetection applications under various light intensity conditions. It provides an FC/APC optical fiber input interface and features three SMA electrical output ports (RF OUT, MONITOR+, MONITOR-). Two output coupling methods, DC coupling and AC coupling, are available to suit different application scenarios. AC coupling blocks the continuous wave component (i.e., the unmodulated portion) of the optical input signal. Therefore, if a relatively weak modulated signal needs to be measured against a strong continuous wave background, the AC coupling detector can be selected. The detector has an M4 threaded mounting hole on the side of the housing, suitable for general installation. Each balanced photodetector comes with a 12V linear power supply.

LBTEK's free-space balanced photodetectors cover three types: UV-enhanced silicon, silicon, and indium gallium arsenide. They can directly receive free-space input optical signals,and feature three SMA electrical connection output ports (RF OUT, MONITOR+, MONITOR-). The detector housing has external SM1 threads and internal SM05 threads, along with 3×M4 threaded holes, facilitating installation onto mounting rods. Each detector comes with two SM1-8B adapters anda ±12 V linear power supply.

LBTEK's free-space balanced photodetectors cover four types: UV-enhanced silicon, silicon, InGaAs, and XInGaAs, with 6 adjustable gain levels to meet the requirements of photodetection applications under different light intensity conditions. They can directly receive free-space input optical signals,feature three SMA electrical output ports (RF OUT, MONITOR+, MONITOR-). The detector housing has SM1 external threads and SM05 internal threads, along with 3×M4 threaded holes for easy mounting onto posts. Each detector comes with two SM1-8B adapters anda ±12 V linear power supply.

LBTEK Balanced Photodetectors are available in two wavelength ranges: 400-1100 nm and 800-1700 nm. They come in two models: fixed gain and adjustable gain. The adjustable gain model has a tuning range of 0~31 dB (software adjustable). Two input types are available: FC/APC fiber input and free-space input.

For the AC-coupled adjustable gain model, the typical low-frequency cutoff is around 30 kHz. For the AC-coupled fixed gain model with a bandwidth of 500 MHz or less, the low-frequency cutoff is around a few hundred Hz. For models with bandwidths above 500 MHz, the low-frequency cutoff is 30 kHz. For custom cutoff frequency requirements, please contact technical support for details.

The LBTEK Si Ultra-low Noise Miniature Balanced Photodetector operates within a wavelength range of 320 nm to 1000 nm, with FC/APC fiber optic input, offering five selectable bandwidth options: 75 MHz, 100 MHz, 200 MHz, 400 MHz, and 500 MHz. Note: The standard product's output coupling method defaults to AC-coupled output. DC-coupled output is available upon request for customization.