Yuan Feng

US Patent:

20180283950, Oct 4, 2018

Filed:

Mar 30, 2018

Appl. No.:

15/941510

Inventors:

- OAKLAND CA, US
Yuan Feng - Irvine CA, US
Ilya Vinogradov - Irvine CA, US

Assignee:

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - OAKLAND CA

International Classification:

G01J 3/45
G01J 3/02

Abstract:

A heterodyne optical spectroscopy system comprises a light source that acts as a local oscillator (LO); a beam splitting component that generates a reference beam from the LO; a signal component that generates a sample signal from a sample; a beam blocker that can turn off the sample signal to generate blank shots; a composite signal detection subsystem that detects a heterodyned signal that is a mix of the sample signal and a portion of the LO; a composite reference detection subsystem synchronized to the signal detection subsystem to detect a portion of the reference beam; and a processor that processes digital signals from the signal detection subsystem and the reference detection subsystem. A very versatile reference scheme is developed to treat different heterodyne spectroscopies in a unified way, which achieves optimal noise suppression.