Patent ID: 11876335
Assignee: NATIONAL YANG MING CHIAO TUNG UNIVERSITY
Field: Optics (Instruments)
Classification: CPC H  G | IPC H

Claim 0:
1. A system to simultaneously generate tunable redshift and blueshift femtosecond laser pulses with adjustable spectral bandwidth and output power, controlled with fiber-optic nonlinearity for continuous spectral manipulation, and the system comprises:
a femtosecond seed laser generates the femtosecond laser pulses;
a driving current controller, connected to the femtosecond seed laser, and the driving current controller controls the output power and a spectrum of the femtosecond seed laser;
a dispersion controller, connected to the femtosecond seed laser, and the dispersion controller varies introduced dispersion to control a temporal pulse width of the femtosecond laser pulses, while maintaining a beam position or/and a light spot size of the femtosecond laser pulses, to achieve tuning of a peak and a bandwidth of output spectral lobes;
a spectral conversion module, connected to the dispersion controller, wherein the spectral conversion module comprises a nonlinear medium for spectral broadening, the spectrum of the femtosecond seed laser is converted and broadened through the spectral conversion module; the redshift and blueshift is tuned towards longer wavelength and shorter wavelength respectively; and
a spectral selection module, connected to the spectral conversion module, wherein the spectral selection module selects an outmost lobes of a broadened spectra and rejects the femtosecond laser pulses at other wavelengths.