US 11,817,669 B2
Table-top ultra supercontinuum and higher harmonic generation source for microscopy
Robert R. Alfano, Bronx, NY (US); Shah Faisal B. Mazhar, Bronx, NY (US); Mikhail Sharonov, Lexington, NY (US); and Lingyan Shi, San Diego, CA (US)
Assigned to Robert R. Alfano, Bronx, NY (US)
Filed by Robert R. Alfano, Bronx, NY (US)
Filed on Nov. 22, 2021, as Appl. No. 17/532,834.
Claims priority of provisional application 63/116,527, filed on Nov. 20, 2020.
Prior Publication US 2022/0166177 A1, May 26, 2022
Int. Cl. H01S 3/10 (2006.01); H01S 3/00 (2006.01); H01S 3/1106 (2023.01); H01S 3/108 (2006.01); H01S 3/107 (2006.01); H01S 5/00 (2006.01); G21K 7/00 (2006.01); A61B 6/00 (2006.01); G02F 1/35 (2006.01)
CPC H01S 3/0092 (2013.01) [H01S 3/0057 (2013.01); H01S 3/0085 (2013.01); H01S 3/107 (2013.01); H01S 3/108 (2013.01); H01S 3/1106 (2013.01); H01S 3/1121 (2013.01); H01S 5/0085 (2013.01); A61B 6/484 (2013.01); G02F 1/3528 (2021.01); G21K 7/00 (2013.01); G21K 2207/005 (2013.01)] 22 Claims
OG exemplary drawing
 
1. Method of generating broad spectra ultra-high frequency spread spanning from Extreme UV (EUV) to far infrared (FIR) comprising the step of introducing high intensity I pump laser pulses 25 fs to 200 fs from 100 μJ to 50 mJ into a medium having third and fifth order components of electric susceptibility χ3 and χ5, respectively, and an average Kerr nonlinear index of refraction
≤n(t)>=n0+n2I+n4I2,
said pulses including ps varying approximation (SVA) following the envelope of a light field and n2I is a first order non-linear Kerr index of refraction related to χ3 and n4I2 is a second order non-linear Kerr index of refraction related to χ5 at laser pulse within the range of 1014˜1020 W/m2, where n2 is a non-linear Kerr index of refraction representing molecular movements that arises from ps response χ3 and n4 is a non-linear Kerr index of refraction representing electric field that arises from χ5 to produce ultra-supercontinuum (USC) light.