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

Claim 11:
12. A system comprising:
an optical source apparatus comprising:
an optical oscillator configured to produce a pulse of light in response to an excitation signal; and
a spectral adjustment apparatus configured to control a spectral property of the pulse of light, wherein the optical oscillator is associated with a plurality of transfer functions, each transfer function being associated with a particular configuration of the spectral adjustment apparatus; and

a control system coupled to the optical source apparatus, the control system configured to:
determine a corrected excitation signal based on the transfer function associated with the particular configuration of the spectral adjustment apparatus used to produce the subsequent pulse of light, and
apply the corrected excitation signal to the optical source apparatus to adjust an energy of a subsequently produced pulse of light to account for a change in the configuration of the spectral adjustment apparatus.