Patent ID: 11867623
Assignee: ABB SCHWEIZ AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A cavity enhanced absorption spectroscopy (CEAS) system, comprising:
a gas cell; and
a plurality of optical component sub-units, each respective optical component sub-unit including a respective gradient index (GRIN) lens included in a respective collimator attached to a respective fiber, wherein the respective GRIN lens and the respective collimator operate to direct a respective laser beam into a cavity of the gas cell, wherein the respective GRIN lens has a diameter of less than 3 millimeters, wherein each respective optical component sub-unit is associated with a respective laser beam of a different wavelength, and wherein the plurality of optical component sub-units are disposed in locations offset from each other in a direction away from a central axis of the gas cell, so that the plurality of laser beams directed by the plurality of optical component sub-units into the cavity are offset from each other in the direction away from the central axis of the gas cell.