Choosing The Right FOG Testing Platform: Portable, Optical Module, Or Fiber Coil Testing?

FOG Testing Platform

As Fiber Optic Gyroscope (FOG) technology continues to advance in inertial navigation, aerospace, defense, and autonomous systems, the demand for accurate and efficient testing solutions has never been higher. From fiber coils and optical modules to complete sensing assemblies, each stage of FOG development requires dedicated testing equipment to ensure performance, reliability, and consistency.
To meet these diverse requirements, YOEC offers three complementary testing platforms: the HD35 Handheld Dual-Channel Optical Module Test System, the MT153B Three-Axis Optical Module Test System, and the MT153 (CT133) Three-Axis Fiber Coil Test System. While all three systems are based on closed-loop FOG technology, each serves a different testing purpose and application scenario.
HD35: Portable Testing Anywhere, Anytime
The HD35 is YOEC's latest handheld optical module testing platform, designed for engineers who require both high accuracy and maximum mobility.
Unlike traditional bench-top systems, the HD35 integrates a built-in industrial touchscreen computer, testing software, optical circuitry, and power management into a compact unit weighing only 700 g. Users can directly connect fiber optic gyroscope optical modules and immediately perform bias testing and angular rate measurements. The system supports both 1310 nm and 1550 nm channels, achieving testing accuracy as high as 0.0005°/h on the 1550 nm channel. It also supports fiber coil lengths up to 5000 m, making it suitable for high-performance FOG development.
The HD35 is particularly valuable for:
Field testing and on-site verification
Rapid R&D evaluation
Portable demonstration systems
Customer acceptance testing
Outdoor environmental experiments
For organizations requiring flexibility and mobility without sacrificing precision, the HD35 provides a unique solution.

MT153B: Dedicated Three-Axis Optical Module Testing
For laboratory and production environments where multiple optical module channels must be tested simultaneously, the MT153B offers a robust three-axis architecture.
Designed specifically for 1550 nm FOG optical modules, the MT153B enables direct testing of optical module assemblies, including bias stability evaluation, temperature testing, vibration testing, and magnetic field sensitivity analysis. The system supports Y-waveguide half-wave voltage measurement and software-based parameter configuration, making it ideal for optical module manufacturing and quality control.
Typical applications include:
Optical module production testing
Module quality inspection
Long-duration bias stability testing
Environmental qualification testing
Process validation during manufacturing
Compared with the HD35, the MT153B focuses on laboratory and production-line deployment rather than portability.

MT153 (CT133): Fiber Coil Testing Before Module Integration
Before optical modules are assembled, the performance of the fiber coil itself must be verified. This is where the MT153 (CT133) Three-Axis Fiber Coil Test System becomes essential.
The system is specifically designed for testing 1310 nm FOG fiber coils and provides direct evaluation of fiber coil bias stability and related performance parameters. Supporting fiber coil lengths from 200 m to 2000 m, the CT133 enables manufacturers to identify potential issues before the coils enter the module assembly process.
Applications include:
Fiber coil performance verification
Incoming inspection
Fiber coil process optimization
Temperature drift analysis
Magnetic field sensitivity testing
Vibration testing
For organizations producing their own fiber coils, the CT133 serves as the first quality-control checkpoint in the FOG manufacturing workflow.

Which System Is Right for You?
Product Test Object Wavelength Accuracy Application Scenario
HD35 Optical Module 1310 nm / 1550 nm Up to 0.0005°/h Portable testing, field use, R&D
MT153B Optical Module 1550 nm ≤0.005°/h Production line, laboratory testing
MT153 (CT133) Fiber Coil 1310 nm ≤0.005°/h Fiber coil evaluation and manufacturing

Complete Testing Solutions for the FOG Industry
From fiber coil characterization to optical module verification and portable field evaluation, YOEC provides a complete range of testing solutions covering the entire FOG development and manufacturing process.
Whether you are developing next-generation inertial navigation systems, optimizing fiber coil production, or validating optical module performance in the field, YOEC's testing platforms deliver the accuracy, reliability, and efficiency required for modern fiber optic gyroscope applications.
Looking for the right testing solution for your FOG project? Contact YOEC's technical team to discuss your specific requirements.