公开(公告)号：US11913835B1

公开(公告)日：2024-02-27

申请号：US18353175

申请日：2023-07-17

Applicant: Vector Atomic, Inc.

Inventor： Micah Perry Ledbetter ,  Martin Machai Boyd ,  Andrew Vernon Dowd ,  William David Lunden ,  Jonathan David Roslund

IPC: G01J3/433

CPC classification number: G01J3/4338 ,  G01J2003/4332

Abstract: Embodiments herein describe spectroscopy systems that use an unmodulated reference optical signal to mitigate noise, or for other advantages. In one embodiment, the unmodulated reference optical signal is transmitted through the same vapor cell as a modulated pump optical signal. As such, the unmodulated reference optical signal experiences absorption by the vapor, which converts laser phase noise to amplitude noise like the other optical signals passing through the vapor cell. In one embodiment, the unmodulated reference optical signal has an optical path in the gas cell that is offset (or non-crossing) from the optical path of the modulated pump optical signal. The unmodulated reference optical signal allows removal or mitigation of the noise on the other optical signal.