US 12,334,701 B2
Laser generation apparatus and sources using the same
Yushi Kaneda, Tucson, AZ (US); Lloyd J. LaComb, Jr., Tucson, AZ (US); and Khanh Kieu, Tucson, AZ (US)
Assigned to TIPD, LLC., Tucson, AZ (US); and ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA, Tucson, AZ (US)
Filed by TIPD, LLC, Tucson, AZ (US); and ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA, Tucson, AZ (US)
Filed on Jan. 5, 2023, as Appl. No. 18/150,723.
Prior Publication US 2024/0235143 A1, Jul. 11, 2024
Int. Cl. H01S 3/00 (2006.01); G02F 1/35 (2006.01); G02F 1/355 (2006.01)
CPC H01S 3/0092 (2013.01) [G02F 1/3534 (2013.01); G02F 1/354 (2021.01); G02F 1/3544 (2013.01); G02F 1/3551 (2013.01); H01S 3/0057 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method of generating light with a wavelength about ⅓ of that of a fundamental light source, the method comprising:
a. generating a second light wave having a broadband fundamental spectrum;
b. generating a first light wave having a narrowband spectrum, wherein the first light wave comprises a second harmonic of the second light wave; and
c. colliding the second light wave and the first light wave in a nonlinear crystal with a crossing angle α chosen such that the magnitude of

OG Complex Work Unit Math
is near a local minimum, thereby maximizing the spectral acceptance on the second light wave;
wherein:
Δk: momentum mismatch, k3−(k1+k2);
ω2: angular frequency of wave 2;
c: speed of light;
ng2: group index of wave 2;
ng3: group index of wave 3; and
α2: crossing angle of wave 2.