US 11,885,746 B2
Downhole laser system with an improved laser output production and data collection
Dustin McIntyre, Washington, PA (US); and Daniel Hartzler, Westover, WV (US)
Assigned to United States Department of Energy, Washington, DC (US)
Filed by United States Department of Energy, Washington, DC (US)
Filed on Aug. 26, 2022, as Appl. No. 17/896,141.
Application 17/896,141 is a division of application No. 17/074,162, filed on Oct. 19, 2020, granted, now 11,451,004.
Claims priority of provisional application 62/916,508, filed on Oct. 17, 2019.
Prior Publication US 2022/0407283 A1, Dec. 22, 2022
Int. Cl. G01N 21/71 (2006.01); H01S 3/106 (2006.01); H01S 3/094 (2006.01); G01N 21/31 (2006.01)
CPC G01N 21/718 (2013.01) [G01N 21/31 (2013.01); H01S 3/094038 (2013.01); H01S 3/094053 (2013.01); H01S 3/094096 (2013.01); H01S 3/106 (2013.01); G01N 2201/0633 (2013.01); G01N 2201/0634 (2013.01); G01N 2201/0636 (2013.01); G01N 2201/06113 (2013.01); G01N 2201/08 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A system for remote optical detection comprising:
an optical pumping source optically connected to an optical fiber;
a first lens optically connected to the optical pumping source and optical fiber;
an adjustable focus lens arrangement optically connected to at least one of the optical pumping source and the optical fiber;
a first mirror optically connected to the first lens and the adjustable focus lens arrangement;
a passively q-switched laser optically connected to the adjustable focus arrangement;
a beam expander optically connected to the passively q-switched laser;
a second mirror optically connected to the beam expander;
a sample area optically connected to at least the beam expander;
a second lens proximate the sample area and optically connected to the second mirror;
a third mirror positioned proximate the sample area and optically connected to at least the second mirror, whereby at least some optical response from the sample area is reflected to the third mirror; and
a spectral emission control optically connected to at least one of the optical fiber and the optical pumping source, wherein the spectral emission control comprises a first spectral emission control lens optically connected to the third mirror and a second spectral emission control lens optically connected to the first spectral emission control lens and the first mirror to reflect at least some optical response from the sample area, reflected by the second mirror to the third mirror, through the first and second spectral emission control lens towards the first lens, which is optically connected to the optical fiber.