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Fiber Optic Gyro (FOG) Inertial Measurement Units (IMUs) are
high-precision navigation sensors using light propagation in fiber coils to measure angular velocity and acceleration
. Ideal for aerospace, defense, and robotics, they provide superior thermal stability, low drift, and high shock/vibration tolerance compared to MEMS. Key manufacturing trends focus on compact, multi-layered architectures for improved, low-SWaP (Size, Weight, and Power), enabling integration into drones, UGVs, and autonomous systems.
- Operating Principle: FOGs use the Sagnac effect , where beams of light propagate in opposite directions through a coiled optical fiber to detect rotation rates.
- Composition: A standard FOG IMU typically integrates three closed-loop FOG axes with three high-end quartz or MEMS accelerometers to measure 6-DOF (degrees of freedom).
- Performance Benefits: They offer exceptional bias stability, low angle random walk (ARW), and high resistance to magnetic interference, making them superior to MEMS in long-term, high-precision navigation.
- Applications: Key industries include UAVs, robotics, underwater vehicles (ROV/AUV), satellite, and missile guidance systems.
- Manufacturing Focus: Factories are optimizing production to create smaller, more rugged, and cost-effective fiber optic sensors.
- Integration: Modern FOG IMUs, often termed "solid-state," have no moving parts and are built to handle high-vibration, high-dynamic environments.
- Customization: Manufacturers like EMCORE Corporation , ERICCO , and Kearfott produce custom-built units tailored to specific defense and industrial navigation requirements.
- Selection Criteria: Key factors for selecting a supplier include achieving low bias instability (<0.01 °/h), low-noise performance, and ensuring environmental resilience.
Key Suppliers (Factories)
- ERICCO Inertial Technology (China)
- Kearfott Corporation
- EMCORE Corporation
- Fiberpro
- MostaTech Ltd
- Aegiverse
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Selecting an Inertial Measurement Unit (IMU) for UAV ApplicationsInertial Measurement Unit Technologies ... MEMS IMUs are ideal for smaller UAV platforms and high-volume production units, as they...Unmanned Systems Technology
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FOG-Based Inertial Sensing Technologies for Unmanned ...Our unique FOG technology utilizes a multi-layered architecture that combines multiple elements into a module, providing significa...Unmanned Systems Technology
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Inertial Measurement Unit (IMU) | An IntroductionFeb 13, 2023 — In the above mentioned scenario, a fibre-optic gyroscope (FOG), may provide the necessary gyroscopic performance – ultra-high accu...Advanced Navigation
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FOG-Based Inertial Sensing Technologies for ...
Unmanned Systems Technology
https://www.unmannedsystemstechnology.com
› aegive...
Unmanned Systems Technology
https://www.unmannedsystemstechnology.com
› aegive...
Aegiverse
designs and manufactures advanced fiber optic gyro (FOG) navigation sensors
for unmanned aerial, ground, marine, and space platforms.
Inertial Measurement Unit (IMU) – An Introduction
Advanced Navigation
https://www.advancednavigation.com
› Tech Articles
Advanced Navigation
https://www.advancednavigation.com
› Tech Articles
Feb 13, 2023
—
Fibre-optic gyroscopes (FOG
) are the preeminent technology for IMUs that must provide ultra-high accuracy and precision, low drift and low bias ...
Read more
CIRUS-A High-Performance FOG Inertial Measurement ...
Emcore LLC
https://www.emcore.com
› products › post › cirus-a-hig...
Emcore LLC
https://www.emcore.com
› products › post › cirus-a-hig...
The CIRUS-A high-performance FOG IMU design simplifies the optical circuit design, reducing the number of components while providing a significant performance ...
Read more
A Complete Guide to Inertial Measurement Unit (IMU)
JOUAV
https://www.jouav.com
› blog › inertial-measurement-u...
JOUAV
https://www.jouav.com
› blog › inertial-measurement-u...
Apr 17, 2025
—
FOG IMUs employ a solid-state technology
where beams of light traverse through a coiled optical fiber. Recognized for being less sensitive to ...
Read more
Inertial Labs Releases IMU-FI-200C High-Performance
Inertial Labs
https://inertiallabs.com
› News
Inertial Labs
https://inertiallabs.com
› News
Nov 23, 2022
—
The
IMU
-FI-200C High-Performance Fiber-Optic Gyroscopes (
FOG
)
Inertial Measurement Units
are a fully integrated inertial measurement solution.
Read more
Inertial Measurement Units | Honeywell Aerospace
Honeywell Aerospace
https://aerospace.honeywell.com
› navigation-and-sensors
Honeywell Aerospace
https://aerospace.honeywell.com
› navigation-and-sensors
Whether MEMS,
FOG
, or RLG-based, Honeywell IMUs offer exceptional accuracy and reliability— even in the most demanding environments. Our globally recognized
IMU
...
Read more
What is the Difference Between MEMS and FOG IMU?
Ericco Inertial Technology
https://www.ericcointernational.com
› application › wh...
Ericco Inertial Technology
https://www.ericcointernational.com
› application › wh...
Apr 10, 2024
—
As the name suggests,
FOG is a type of IMU that uses optical fibers
to measure the angular speed or rotation rate of any object. Due to the low ...
Read more
(820)
What is FOG Inertial Measurement Units? Uses, How It ...
LinkedIn · Core Business Intelligence Partners
4 months ago
LinkedIn · Core Business Intelligence Partners
4 months ago
Fog Inertial Measurement Units are
specialized sensors that utilize micro-electromechanical systems (MEMS) technology
combined with fog ...
Read more
Inertial Measurement Units | Collins Aerospace
RTX
https://www.rtx.com
› inertial-navigation-systems
RTX
https://www.rtx.com
› inertial-navigation-systems
The LITIS® tactical grade Inertial Measurement Unit (IMU)
offers near fiber optic gyro (FOG) performance
in a compact, lightweight, rugged design. It has the ...
Read more
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