公开(公告)号：US12259318B2

公开(公告)日：2025-03-25

申请号：US17627298

申请日：2020-07-16

Applicant: Mirico Limited

Inventor： James Hobby ,  Damien Weidmann ,  Richard Kovacich

IPC: G01N21/3504 ,  G01J3/433 ,  G01N21/39 ,  G01J3/42

Abstract: The invention provides a chirped laser dispersion spectrometer having two tunable lasers each with a bias current supply, a chirp signal source to provide a matching chirp pattern, a beam splitter to produce a single beam from the two first and second tunable lasers and active-phase locking means to render the two beams phase coherent and to produce a radio frequency carrier signal capable of programmable phase modulation by means of an optical beat signal. The invention also provides a method for generating at least two optical frequency signals for use in a frequency modulation spectroscopy (FMS) process for the detection and/or measurement of molecular species in a gas mixture and a method for generating at least two optical frequency signals for use in a chirped laser dispersion spectroscopy (CLaDS) process for the detection and/or measurement of molecular species in a gas mixture. The invention provides an efficient and cost-effective CLaDS system which maintains optical modulation whilst enabling greater change of the modulation frequency.

公开(公告)号：US20220260486A1

公开(公告)日：2022-08-18

申请号：US17627298

申请日：2020-07-16

Applicant: Mirico Limited

Inventor： James Hobby ,  Damien Weidmann ,  Richard Kovacich

IPC: G01N21/3504 ,  G01N21/39 ,  G01J3/433

Abstract: The invention provides a chirped laser dispersion spectrometer having two tunable lasers each with a bias current supply, a chirp signal source to provide a matching chirp pattern, a beam splitter to produce a single beam from the two first and second tunable lasers and active-phase locking means to render the two beams phase coherent and to produce a radio frequency carrier signal capable of programmable phase modulation by means of an optical beat signal. The invention also provides a method for generating at least two optical frequency signals for use in a frequency modulation spectroscopy (FMS) process for the detection and/or measurement of molecular species in a gas mixture and a method for generating at least two optical frequency signals for use in a chirped laser dispersion spectroscopy (CLaDS) process for the detection and/or measurement of molecular species in a gas mixture. The invention provides an efficient and cost-effective CLaDS system which maintains optical modulation whilst enabling greater change of the modulation frequency.