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How to Mitigate the Coherent Fading Issue in DAS Systems?
Distributed Acoustic Sensing (DAS) systems operate based on the principle of coherent Rayleigh scattering. They function by injecting narrow-linewidth coherent optical pulses into an optical fiber, receiving the backscattered Rayleigh signals returning from various positions along the fiber, and demodulating the phase or intensity variations of these signals. This enables distributed sensing and measurement of external disturbances such as vibrations and acoustic waves.
Release Date：2026-01-30
Unmanned Aerial Vehicle (UAV) Intrusion Detection Technology and Applications Based on Distributed Acoustic Sensing (DAS)
With the widespread adoption of UAV technology, while playing a positive role in areas such as aerial photography, inspection, and logistics, it has also introduced security risks such as "low-altitude intrusion" and "illegal flight." In key areas such as airports, military facilities, energy infrastructure, and critical industrial parks, traditional radar, video, or radio frequency monitoring methods still exhibit certain limitations in scenarios involving low-altitude, stealth, and small-target detection.
Release Date：2026-01-27
Application of Distributed Acoustic Sensing (DAS) in New Factory Renovation Projects
During the construction of new factories or renovation of existing facilities, challenges such as complex construction-induced vibrations, densely packed pipelines, stringent structural safety requirements, and tight construction schedules are commonly encountered. Particularly in industries such as high-end manufacturing, electronics and semiconductors, energy and chemical engineering, and biopharmaceuticals, new factory buildings typically integrate extensive underground utility tunnels, pressurized pipelines, cable tray systems, and precision equipment, which impose heightened demands for monitoring vibrations, anomalous intrusions, and structural safety during the construction phase.
Release Date：2026-01-21
1-1200MHz RF Broadband Power Amplifier
A high-performance broadband RF power amplifier, delivering exceptional gain control and output power for diverse RF application scenarios. Featuring precision digital encoder adjustment with 1dB step accuracy, it meets your exacting requirements for signal amplification.
Release Date：2026-01-14
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Impact and Suppression Applications of Coherent Fading in Distributed Acoustic Sensing (DAS) Systems
In Distributed Acoustic Sensing (DAS) systems, distributed perception of vibration or acoustic information along the optical fiber is achieved by injecting narrow-linewidth coherent laser pulses into the fiber, receiving backscattered signals from a multitude of Rayleigh scattering points within the fiber, and demodulating their phase or intensity variations.
Release Date：2026-01-12
Integrated DAS Optical Module
To facilitate researchers, system developers, and product engineers in the optical fiber sensing field in constructing their own Distributed Acoustic Sensing (DAS) systems more efficiently, Shanghai Kunlian Technology has launched an integrated DAS module. This module highly integrates multiple optoelectronic components from traditional DAS systems—such as complex light sources, modulation devices, amplifiers, and control units—into a compact structure roughly the size of a "slightly thick book," significantly simplifying the system setup process. Users only need to pair it with a high-speed data acquisition card installed in an industrial computer (or standard PC) to complete all hardware preparations for the DAS system. The remaining development efforts can then focus on implementing the host computer software, signal processing algorithms, and system application logic. Shanghai Kunlian Technology also offers complimentary technical support services to assist in the rapid validation and integration of the DAS system.
Release Date：2026-01-08
DAS-U1000 Extreme Edition Demodulation Card
The DAS-U1000 Demodulation Card is a flagship-grade DAS demodulation system engineered for extreme environment monitoring and high-precision sensing applications. Equipped with a 4-channel 16-bit ADC featuring a 1000 MSPS sampling rate and a single-channel 14-bit DAC operating at 2500 MSPS, it supports external reference clock input. This configuration comprehensively addresses the demanding technical requirements for simultaneously achieving long-distance, high dynamic range, and high spatial resolution performance.
Release Date：2026-01-06
DAS-U250 Ultimate Edition Demodulation Card
The DAS-U250 is a high-performance Distributed Acoustic Sensing (DAS) system launched by Shanghai Kunlian Technology, specifically engineered for application scenarios demanding high precision and reliability in extreme environments. Compared to the standard version, the DAS Advanced Edition integrates Coherence Fading and Polarization Fading noise suppression technologies, significantly enhancing its anti-interference capability and ensuring stable, efficient high-precision data acquisition even in complex signal environments. The system boasts an exceptional spatial resolution better than 5 meters, supports remote monitoring and high-precision localization, and is widely applied in fields such as petroleum exploration, deep-sea monitoring, high-precision seismic monitoring, military reconnaissance, and environmental surveillance.
Release Date：2026-01-05
PDH Sensing Demodulator
This PDH frequency stabilization system features a typical laser linewidth of 0.1 kHz, a tunable range of 1549.4–1550.3 nm, support for 1–12 strain sensing channels, and a feedback speed of up to 5 kHz (customizable). It is suitable for applications requiring precise laser frequency control, such as optical communications and precision sensing.
Release Date：2025-12-30