Fiber Testers

OTDRs

Optical Time Domain Reflectometers (OTDRs) are essential instruments for detecting faults, measuring link lengths, and characterizing fiber optic cables. By sending pulses of light and analyzing the reflected signals, OTDRs provide a graphical representation of the entire fiber link. GAO Tek’s OTDRs offer high resolution, long-range capability, and intelligent analysis software, allowing technicians to identify splices, breaks, and connector losses quickly and accurately.

These tools are widely used in fiber network deployment, acceptance testing, and preventive maintenance in telecom networks, data centers, and FTTx systems. Whether mapping metro rings or troubleshooting fiber links in the field, OTDRs provide vital insights for network integrity and performance. GAO Tek’s OTDRs are portable, rugged, and equipped with user-friendly interfaces designed for field technicians and engineers.

Also known as fiber reflectometers, backscatter testers, or fiber distance analyzers, OTDRs are indispensable in modern optical communication environments. Our models come with trace analysis, storage, and export capabilities to integrate seamlessly with network documentation workflows.

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Optical Fiber Rangers

Optical Fiber Rangers serve as simplified, cost-effective versions of OTDRs for quickly locating faults and measuring fiber length. These devices send a light pulse down the fiber and detect back-reflected signals to estimate the distance to breaks, bends, or high-loss points. GAO Tek offers compact, battery-operated rangers designed for quick field checks and emergency diagnostics.

Commonly used by field technicians, contractors, and installers, fiber rangers are perfect for last-mile FTTx testing, patch panel verification, and identifying disconnections in optical access networks. They provide faster deployment checks without the complexity or cost of a full OTDR, making them ideal for preliminary assessments or rapid field response.

These instruments are also referred to as mini OTDRs, fault locators, or optical range testers. GAO Tek's optical fiber rangers are designed to deliver quick results with minimal training, offering reliable performance in diverse fiber environments.

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Optical Fiber Meters

Optical fiber meters are used to measure the power level of optical signals, either transmitted from a light source or passing through a live fiber. These meters are fundamental for confirming signal strength, ensuring compliance with system specifications, and validating component performance. GAO Tek’s power meters cover a wide range of wavelengths and feature high measurement accuracy, fast response time, and large memory for storing test data.

These meters are utilized during installation, troubleshooting, and routine inspection of fiber optic networks in telecom, CATV, and enterprise LANs. They help technicians validate signal budgets, detect link degradation, and optimize optical transceiver performance. Our handheld models are ideal for use in the field, while benchtop versions support lab-grade precision and calibration routines.

Also known as fiber power meters, optical light meters, or signal strength testers, these devices are essential for maintaining the health of optical communication systems. GAO Tek’s units support both single-mode and multimode applications and are compatible with a wide range of fiber connectors and patch cords.

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Fiber Optic Multimeters

Fiber optic multimeters combine the functions of optical power meters and light sources into a single device, offering a comprehensive solution for verifying fiber optic links. These tools enable end-to-end loss testing, continuity checks, and signal power validation, simplifying the testing workflow and reducing the need for multiple instruments. GAO Tek’s multimeters feature dual-wavelength support, automatic wavelength recognition, and intuitive controls for enhanced usability.

Commonly used in FTTx rollouts, telecom network commissioning, and routine maintenance tasks, fiber multimeters help field engineers verify that installed fiber links meet specifications for power loss and signal transmission. They streamline the validation process by enabling two-way testing from one device, increasing efficiency during on-site inspections.

These products are also called optical loss testers, dual-function fiber meters, or integrated fiber testers. GAO Tek’s fiber optic multimeters are built to withstand demanding environments and are supplied with robust calibration and support tools to ensure long-term accuracy and usability.

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Visual Fault Locators

Visual Fault Locators (VFLs) are compact laser-based devices used to visually identify breaks, bends, or faulty splices in optical fibers. They emit a bright red light that travels through the fiber and leaks out at points of high loss, enabling easy fault identification with the naked eye. GAO Tek’s VFLs are designed with rugged enclosures, long battery life, and universal connectors for use in a wide variety of fiber types.

These tools are used extensively by field technicians during installation, splicing, and patch panel validation tasks. VFLs help confirm fiber routing, continuity, and integrity, especially in environments where OTDRs or power meters are unnecessary or impractical. They are particularly effective for detecting issues in short-range fiber links and verifying polarity during termination.

Often referred to as fiber visual tracers, red light pens, or laser fault detectors, VFLs are among the most commonly carried tools by fiber technicians. GAO Tek’s models deliver consistent laser output, high fault visibility, and reliable performance even under harsh field conditions.

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GAO Tek Inc. provides these products and systems with robust R&D, ensuring reliability, scalability, and technical excellence to help industries achieve their goals.

Our products are in stock and can be shipped overnight to the Continental U.S. and Canada from one of our local warehouses. If you have any questions, our technical experts can help you. Please fill out this form or email us.