US 12,332,476 B2
Long wavelength generation in optical fiber
Peter Morten Moselund, Copenhagen N (DK)
Assigned to NKT Photonics A/S, Birkerød (DK)
Filed by NKT Photonics A/S, Birkerød (DK)
Filed on Apr. 19, 2024, as Appl. No. 18/641,121.
Application 18/641,121 is a continuation of application No. 14/416,887, granted, now 12,001,051, previously published as PCT/DK2013/050248, filed on Jul. 22, 2013.
Claims priority of provisional application 61/674,475, filed on Jul. 23, 2012.
Prior Publication US 2024/0264362 A1, Aug. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/35 (2006.01); G02B 6/02 (2006.01); G02F 1/365 (2006.01)
CPC G02B 6/02214 (2013.01) [G02F 1/3513 (2013.01); G02F 1/353 (2013.01); G02F 1/365 (2013.01); G02F 1/3528 (2021.01)] 23 Claims
OG exemplary drawing
 
1. A supercontinuum light source comprising a pump light source arranged to emit pump light and a nonlinear fiber having a core arranged to receive the pump light wherein said pump light and nonlinear fiber are arranged so that a supercontinuum comprising infrared wavelengths is generated in said nonlinear fiber from said pump light, said nonlinear fiber having a dispersion profile, the dispersion profile comprising:
a. a zero dispersion wavelength ZDW,
b. a positive peak value at a peak wavelength longer than said zero dispersion wavelength ZDW, and
c. a minimum value of dispersion at a minimum wavelength longer than the peak wavelength,
wherein said pump light is arranged to comprise energy at one or more pump wavelengths which are longer than said zero dispersion wavelength ZDW, whereby said dispersion profile causes a soliton red-shift that occurs when said supercontinuum is generated in said nonlinear fiber to be most accelerated at wavelengths at which Raman based soliton energy loss and an increasing mode field diameter cause the soliton red-shift to slow down, thereby overcoming said soliton red-shift slow down and enabling continuing soliton red-shift to longer infrared wavelengths.