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

Claim 5:
6. A method to simultaneously generate tunable redshift and blueshift femtosecond laser pulses with adjustable spectral bandwidth and output power to optimize an output spectral bandwidth or the output power, comprising:
S1. a femtosecond seed laser generates femtosecond laser pulses;
S2. a driving current controller sends control signals to the femtosecond seed laser and regulates the output power, a temporal pulse width, or a spectrum of the femtosecond laser pulses;
S3. a dispersion controller provides dispersion to the spectrum of the femtosecond laser pulses, and thus controls the temporal pulse width and a peak intensity of the femtosecond laser pulses, while maintaining a beam position or/and a light spot size of the femtosecond laser pulses, so as to tune output spectral lobes;
S4. a spectral conversion module takes the spectrum after the dispersion controller as an input, and the spectral conversion module comprises a nonlinear medium for spectral broadening; the redshift and blueshift of the spectral broadening is simultaneously tuned by the dispersion controller and the driving current controller; and
S5. a spectral selection module selects outmost spectral lobes of a broadened spectra and remove the femtosecond laser pulses at other wavelengths.