US 12,259,318 B2
Chirped laser dispersion spectrometer and method
James Hobby, East Sussex (GB); Damien Weidmann, Berkshire (GB); and Richard Kovacich, Oxfordshire (GB)
Assigned to Mirico Limited, Didcot (GB)
Appl. No. 17/627,298
Filed by Mirico Limited, Didcot (GB)
PCT Filed Jul. 16, 2020, PCT No. PCT/EP2020/070155
§ 371(c)(1), (2) Date Jan. 14, 2022,
PCT Pub. No. WO2021/009289, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 1910200 (GB), filed on Jul. 16, 2019.
Prior Publication US 2022/0260486 A1, Aug. 18, 2022
Int. Cl. G01N 21/3504 (2014.01); G01J 3/433 (2006.01); G01N 21/39 (2006.01); G01J 3/42 (2006.01)
CPC G01N 21/3504 (2013.01) [G01J 3/4338 (2013.01); G01N 21/39 (2013.01); G01J 2003/423 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A chirped laser dispersion spectrometer comprising:
a first tunable laser for providing a first beam at a first wavelength;
a second tunable laser for providing a second beam at a second wavelength;
a bias current supply for the first tunable laser and a bias current supply for the second tunable laser and chirp signal source for the first and second tunable lasers to provide a matching chirp pattern;
a beam combining optical element to produce a single beam from the first and second tunable lasers; and
active-phase locking means to render the phases of the first and second beams coherent with each other and to produce at least one radio frequency carrier signal capable of programmable phase modulation by means of an optical beat signal wherein the phase locking means comprises negative electronic feedback.