Fiber Optic Gyros, FOG-Based IMUs and GNSS-INS for Unmanned & Autonomous Vehicles

Fiber Optic Gyroscopes (FOGs)

DSP-1760 FOG Gyro Sensor

Navigation-grade, low-noise gyro

The DSP-1760 is a navigation-grade fiber optic gyroscope designed to provide precise navigation, pointing and stabilization for unmanned and autonomous systems on land, at sea or in the air.

With a choice of one, two or three axes of the world’s smallest precision FOGs, it provides unmatched versatility for even the most challenging applications.

The high-bandwidth, low-noise angular rate sensor has been developed with our proprietary polarization maintaining ThinFiber technology, miniaturizing the gyro size while boosting accuracy and performance.

The DSP-1769 provides unparalleled flexibility with the choice of easy-to-integrate housed packaging or an unhoused OEM variant. Housed variants are available with either Micro-D connector or circular connector, and unhoused with a Micro-D connector.

Inertial Measurement Units (IMUs)

P-1775 IMU Sensor

Advanced, solid-state FOG IMU

The P-1775 IMU is an advanced FOG-based inertial measurement unit, featuring three axes of magnetometers and either 10g or 25g low-noise accelerometers. Based around our state-of-the-art photonic integrated chip (PIC) technology, the P-1775 provides superior reliability and repeatability, making it ideal for the high-accuracy demands of autonomous systems.

The P-1775 delivers extremely high bandwidth, low latency and low drift, and incorporates sophisticated DSP electronics that improve FOG performance in critical areas such as scale factor and bias over temperature, scale factor linearity, and maximum input rate. The unique design overcomes the limitations of analog signal processing, eliminating temperature-sensitive drift and rotation errors.

A flexible interface provides user-programmable data rates from 1 to 5000 Hz and baud rates from 9.6 Kbps to 4147 Kbps.  Jump to specification & comparison >

Learn more: P-1775 IMU Sensor

1750 IMU High-Performance Sensor

Commercial COTS IMU for Unmanned Applications

The 1750 IMU is a high-precision inertial measurement unit designed for SWaP (size, weight and power)-conscious applications such as UAVs and UGVs.

Pairing our ThinFiber miniature FOG technology with solid state MEMS accelerometers, the compact sensor delivers high bandwidth with very low noise.

With sophisticated DSP electronics that improve FOG performance, the unit provides excellent bias stability and repeatability and features superior shock, vibration, and thermal functionality. The unique design overcomes the limitations of analog signal processing, eliminating temperature-sensitive drift and rotation errors.

The 1750 is available with 2g, 10g, or 30g accelerometers and features a flexible, user-friendly interface with programmable data output rates from 1 – 1000 Hz. Jump to specification & comparison >

Learn more: 1750 IMU High-Performance Sensor

1725 IMU – FOG-Based Inertial Sensor

Affordable COTS Fiber Optic Gyro IMU

The 1725 IMU 6-degrees-of-freedom (6-DOF) MEMS sensor offering FOG-like performance and stability.

Integrating three high-performance KVH gyros and three low-noise MEMS accelerometers, it provides an ideal balance between affordability and high performance and bandwidth.

The lightweight, compact package is easily integrated into a variety of applications, such as UAV mapping and precision platform stabilization.

The 1725 is constructed with our proprietary ThinFiber technology, which provides enhanced FOG performance in miniaturized devices with very high bandwidth and very low noise.

The integrated DSP electronics deliver enhanced scale factor and bias vs. temperature and scale factor linearity. The 1725’s flexible interface provides programmable message outputs, baud and data rates, addressing the needs of a wide range of applications and platforms. Jump to specification & comparison >

Learn more: 1725 IMU – FOG-Based Inertial Sensor

Comparison & Specifications:

	1725 IMU	1750 IMU	1775 IMU
Dimensions (diameter x height)	88.9 x 73.7 mm (3.5” x 2.9”)
Weight	0.7 kg (1.5 lbs)
Bias Instability	≤1°/hr, 1σ	≤0.1°/hr, 1σ (max), ≤0.05°/hr, 1σ (typical)	≤0.1°/hr, 1σ (max), ≤0.05°/hr, 1σ (typical)
Angle Random Walk	≤0.017°/√hr (≤1°/hr/√Hz )	≤0.012°/√hr (≤0.7°/hr/√Hz )	≤0.012°/√hr (≤0.7°/hr/√Hz )
Scale Factor Non-Linearity	≤200 ppm, 1σ	≤50 ppm, 1σ	≤50 ppm, 1σ

Inertial Navigation Systems (INS)

GEO-FOG 3D INS & AHRS

Rugged, high-accuracy INS and AHRS with embedded GNSS

The GEO-FOG 3D inertial navigation system (INS) complements and enhances GNSS performance, providing accurate navigation data even when satellite signals are blocked or unavailable. Based around 3 axes of FOG gyros, magnetometers and low-noise MEMS accelerometers, and incorporating a pressure sensor and embedded Trimble GNSS receiver, the unit delivers reliable, precise navigation and control for a wide range of unmanned systems in all domains.

Our unique, highly intelligent sensor fusion algorithm is up to 10x faster than other systems and extracts more data from the inertial core processor, providing ultra-high bandwidth for the most demanding applications. Built to withstand highly challenging conditions, the GEO-FOG 3D delivers stable, accurate data even in harsh environments.

Providing up to 8 mm positioning accuracy, the GEO-FOG 3D INS also features a continuously-running north-seeking gyrocompass that provides highly accurate heading. Jump to specification & comparison >

Learn more: GEO-FOG 3D INS & AHRS

GEO-FOG 3D Dual INS

High-performance COTS INS & AHRS with embedded GNSS

The GEO-FOG 3D Dual is the dual-antenna version of our GEO-FOG 3D INS, featuring two GNSS antennas on a fixed RTK baseline and delivering increased heading, pitch, and roll accuracy for both static and dynamic applications where a single antenna system will not suffice.

The dual-antenna INS is ideal for UAVs and robotic vehicles that require heading at start-up or in low dynamic conditions. Jump to specification & comparison >

Learn more: GEO-FOG 3D Dual-Antenna INS

Comparison & Specifications:

	GEO-FOG 3D	GEO-FOG 3D Dual
Dimensions	90 x 90 x 98 mm	94 x 94 x 95 mm
Weight	655 g	740 g
Horizontal Position Accuracy	0.8 m	0.8 m
Horizontal Position Accuracy (SBAS)	0.5 m	0.5 m
Horizontal Position Accuracy (RTK)	0.008 m	0.008 m
Vertical Position Accuracy	1.5 m	1.5 m
Vertical Position Accuracy (SBAS)	0.8 m	0.8 m
Vertical Position Accuracy (RTK)	0.015 m	0.015 m
Velocity Accuracy	0.007 m/s	0.005 m/s
Roll & Pitch Accuracy	0.01°	0.01°
Heading Accuracy	0.05°	0.01°

Navigation & Control

Our FOGs and inertial systems provide high-accuracy angular rate and acceleration data for navigation and control systems in a wide range of unmanned vehicles in all domains.

Positioning & Georeferencing

Our systems enable accurate gyro-stabilization for precision positioning and imaging systems, with low noise, high bandwidth and superior data processing abilities.

Pointing & Stabilization

High-accuracy pointing and stabilization systems is essential for radar, LiDAR, antennas, electro-optical payloads and a wide range of other unmanned vehicle subsystems. Our FOGs and inertial sensors significantly enhance performance by reliably eliminating error-generating movement in line-of-sight devices or precision data-gathering systems.

Autonomous Navigation

Based on state-of-the-art photonic integrated chip technology, our FOG-based inertial sensors provide reliable data for accurate autonomous navigation in all environments and weather conditions, even when GNSS signals are unavailable.