Patent ID: 11947268
Assignee: CYMER, LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A method of controlling an optical source apparatus to generate a pulsed light beam that has at least two spectral peaks separated by a spectral distance, the method comprising:
generating a first pulse of light from the optical source apparatus, the first pulse of light having a first wavelength and a first value of an energy property;
adjusting at least one component of the optical source apparatus from a first configuration state to a second configuration state, the at least one component being configured to control a spectral property of light emitted from the optical source apparatus;
determining a corrected excitation signal; and
applying the corrected excitation signal to the optical source apparatus after adjusting the at least one component from the first configuration state to the second configuration state to generate a second pulse of light from the optical source apparatus, the second pulse of light having a second wavelength and the first value of the energy property, wherein the pulsed light beam comprises at least the first pulse of light and the second pulse of light, the spectral distance is a difference between the first wavelength and the second wavelength, the optical source apparatus is associated with a plurality of transfer functions, each transfer function corresponds to a particular configuration state of the at least one component of the optical source apparatus, and the corrected excitation signal accounts for a variation between the transfer function associated with the first configuration state and the transfer function associated with the second configuration state.