US 11,815,782 B2
Mid-infrared broadband laser using cascaded nonlinearities in mid-infrared fiber and nonlinear crystal
Reza Salem, Columbia, MD (US); Peter Fendel, Sparta, NJ (US); Sterling Backus, Erie, CO (US); Dongfeng Liu, Columbia, MD (US); and Chenchen Wan, Jessup, MD (US)
Assigned to Thorlabs, Inc., Newton, NJ (US)
Filed by Thorlabs, Inc., Newton, NJ (US)
Filed on Feb. 15, 2022, as Appl. No. 17/672,390.
Claims priority of provisional application 63/149,862, filed on Feb. 16, 2021.
Prior Publication US 2022/0260889 A1, Aug. 18, 2022
Int. Cl. G02F 1/35 (2006.01); G02F 1/355 (2006.01); G02F 1/365 (2006.01); H01S 3/00 (2006.01); H01S 3/067 (2006.01)
CPC G02F 1/3507 (2021.01) [G02F 1/3503 (2021.01); G02F 1/3528 (2021.01); G02F 1/3548 (2021.01); G02F 1/3551 (2013.01); G02F 1/365 (2013.01); H01S 3/0092 (2013.01); H01S 3/06716 (2013.01); G02F 2203/11 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A mid-infrared broadband laser comprising:
a femtosecond laser configured to generate a near-infrared light;
a nonlinear waveguide configured for anomalous dispersion, and broadening and/or shifting a spectrum of the light from the femtosecond laser, and with mid-infrared transmission at wavelengths longer than 2 μm, such that self-compression and higher order soliton propagation occur for a portion of the light spectrum above 2 μm; and
a nonlinear medium configured to generate a broadband light by mixing spectral components of the output from the nonlinear waveguide.