Quasi-monolithic heterodyne laser interferometer for inertial sensing
Abstract
We present a compact heterodyne laser interferometer developed for high-sensitivity displacement sensing applications. This interferometer consists of customized prisms and wave plates assembled as a quasi-monolithic unit to realize a miniaturized system. The interferometer design adopts a common-mode rejection scheme to provide a high rejection ratio to common environmental noise. Experimental tests in vacuum show a displacement sensitivity level of 11 p m / H z at 100 m H z and as low as 0.6 p m / H z above 1 p m . The prototype unit is 20 m m × 20 m m × 10 m m in size and weighs 4.5 g , allowing subsequent integration in compact systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 27, 2022
- Source ID
- 10.1364/ol.473476
Entities
People
- Felipe Guzman
- Yanqi Zhang
Organizations
- National Aeronautics and Space Administration
- National Geospatial-Intelligence Agency
- National Science Foundation
- Texas A&M University