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This content will become publicly available on September 27, 2023

Title: Quasi-monolithic heterodyne laser interferometer for inertial sensing

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 of11pm/Hzat100mHzand as low as0.6pm/Hzabove1pm. The prototype unit is20mm×<#comment/>20mm×<#comment/>10mmin size and weighs4.5g, allowing subsequent integration in compact systems.

Publication Date:
Journal Name:
Optics Letters
Page Range or eLocation-ID:
Article No. 5120
0146-9592; OPLEDP
Optical Society of America
Sponsoring Org:
National Science Foundation
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