US 12,117,607 B2
Micro-electro-mechanical system (MEMS) micro-mirror array steered laser transmitter and situational awareness sensor with wavelength conversion
Benn H. Gleason, Tucson, AZ (US); Gerald P. Uyeno, Tucson, AZ (US); and Sean D. Keller, Tucson, AZ (US)
Assigned to Raytheon Company, Tewksbury, MA (US)
Filed by Raytheon Company, Tewksbury, MA (US)
Filed on Apr. 28, 2021, as Appl. No. 17/242,861.
Prior Publication US 2022/0350133 A1, Nov. 3, 2022
Int. Cl. H01S 3/08 (2023.01); G01S 7/481 (2006.01); G01S 17/89 (2020.01); G02B 26/08 (2006.01); H01S 3/00 (2006.01)
CPC G02B 26/0833 (2013.01) [G01S 7/4811 (2013.01); G01S 17/89 (2013.01); H01S 3/0071 (2013.01); H01S 3/08059 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A laser device, comprising:
a laser configured to generate a beam of optical radiation at an input wavelength;
a fixed mirror having a first conic section oriented along an optical axis;
a Micro-Electro-Mechanical System (MEMS) Micro-Mirror Array (MMA) positioned to receive the beam, said MEMS MMA comprising a plurality of mirrors that approximate an off-axis section of a parabolic surface to focus the optical radiation into a collimated spot-beam on the first conic section of the fixed mirror, said mirrors responsive to command signals to at least tip and tilt in two degrees-of-freedom (2 DOF) to re-direct and steer the collimated spot-beam in two-dimensions about the optical axis on the first conic section of the fixed mirror to scan a field-of-regard (FOR) around the optical axis; and
a first optical non-linear material (NLM) in an optical path of the spot-beam to convert the input wavelength to a different first output wavelength while preserving the steering of the spot-beam over the FOR.