Available Technology

Sagnac Optomechanical Gyroscope

A miniaturized gyroscope with improved sensitivity and performance for navigation applications requiring low-cost and reduced power devices

Gyroscopes are important for applications in navigation, guidance, and control. Ideally, gyroscopes are accurate, stable, low cost, low power, and small weight and size, in some cases with high dynamic range. Many of these applications could benefit from miniaturization; however, the possibilities are limited because designs for conventional gyroscopes tend to exhibit better sensitivity and resolution at larger scales.

Patent Abstract: 

Sandia researchers have developed an Optomechanical Gyroscope to sense rotation in applications that require high-performing, small form-factor devices for navigation, guidance, and control applications requiring low-cost and reduced power requirement devices. This gyroscope design solves a longstanding trade-off between size and performance by leveraging the scaling properties of the optomechanical spring effect, which improves scale factor sensitivity as device dimensions shrink. Upon rotation, the laser frequency detuning changes due to the Sagnac effect. The change in detuning induces a change in the mechanical resonant frequency due to the well-known optical spring effect. This gyroscope design may achieve sensitivity that competes with fiber-optic gyroscopes at an order of magnitude lower cost and size.

Benefits 
  • Scale factor sensitivity improves as the device dimensions shrink
  • Miniaturization (15 microns) leads to lower cost per unit and reduced power requirements
  • Supports co-located and coupled optical and high Q mechanical modes
  • No laser modulation required
  • Manufacturable in semiconductor microfabrication facilities
  • Reduces reliance on GPS
applications 

Military/defense

GPS-denied navigation and guidance

Navigation alternative to GPS in high-end consumer products such as cell phones and vehicles

Patent Number: 
10,458,795
Internal Laboratory Ref #: 
SD# 14018
Patent Status: 
Granted
Patent Issue Date: 
October 29, 2020
Lab Representatives
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