Low crosstalk ultra-compact array receiving module for target position detection.

Area of Science:

• Photonics and Optical Engineering
• Sensor Technology
• Integrated Optics

Background:

• Traditional target detection systems often suffer from low integration, large size, high channel crosstalk, and poor environmental adaptability.
• There is a need for compact, highly integrated modules capable of precise target position and status monitoring.
• Optical fiber sensing technologies offer potential for enhanced detection capabilities but require sophisticated receiving modules.

Purpose of the Study:

• To present a novel 16-channel ultra-compact array receiving module for target position detection.
• To demonstrate the module's capability for low crosstalk and high signal reception sensitivity.
• To evaluate the module's stability and applicability in various environmental conditions.

Main Methods:

• Hybrid integration of an arrayed waveguide grating (AWG), variable optical attenuator (VOA), array avalanche photodiodes (APDs), and operational amplifier circuits.
• Fabrication of a module with dimensions of 90mm × 50mm × 8mm.
• Performance evaluation including channel crosstalk, signal reception sensitivity, and operational stability across a temperature range of -10°C to 60°C.

Main Results:

• Achieved ultra-compact module size (90mm × 50mm × 8mm) with 16 channels.
• Demonstrated remarkable low channel crosstalk of -60 dB.
• Exhibited high signal reception sensitivity of -30 dBm and excellent stability between -10°C and 60°C.

Conclusions:

• The developed module overcomes limitations of discrete detection systems, offering high integration, small volume, low crosstalk, and good environmental adaptability.
• When paired with optical fiber sensors, the module enables precise monitoring of target position and status.
• The module holds significant application value in seismic detection, underwater monitoring, and energy exploration.