Direct ultrashort laser system
First Claim
Patent Images
1. A method of using a laser system, the method comprising:
- (a) emitting at least one laser beam pulse;
(b) introducing reference phases in the at least one pulse;
(c) detecting harmonic frequency intensities of the at least one pulse;
(d) determining a matrix of the detected harmonic frequency intensities versus the reference phases;
(e) determining a maximum intensity in the matrix for each frequency of the at least one pulse;
(f) assigning a value corresponding to each maximum intensity;
(g) determining a second derivative of a spectral phase from the maximum intensity values for each frequency;
(h) calculating a double integral with respect to frequency in order to obtain a spectral phase function of distortions in the at least one pulse;
(i) canceling the distortion in the at least one pulse by introducing a negative value of that calculated in step (h); and
(j) introducing the negative value to cancel distortion using a non-programmable optic including at least one of;
(a) a deformable mirror, (b) a chirped mirror, and (c) a grating.
3 Assignments
0 Petitions
Accused Products
Abstract
A direct ultrashort laser system is provided. In another aspect of the present invention, a method of measuring laser pulse phase distortions is performed without requiring an adaptive pulse shaper or interferometry. In yet another aspect of the present invention, a system, a method of operating, a control system, and a set of programmable computer software instructions perform Multiphoton Intrapulse Interference Phase Scan processes, calculations, characterization and/or correction without requiring an adaptive pulse shaper.
212 Citations
26 Claims
-
1. A method of using a laser system, the method comprising:
-
(a) emitting at least one laser beam pulse; (b) introducing reference phases in the at least one pulse; (c) detecting harmonic frequency intensities of the at least one pulse; (d) determining a matrix of the detected harmonic frequency intensities versus the reference phases; (e) determining a maximum intensity in the matrix for each frequency of the at least one pulse; (f) assigning a value corresponding to each maximum intensity; (g) determining a second derivative of a spectral phase from the maximum intensity values for each frequency; (h) calculating a double integral with respect to frequency in order to obtain a spectral phase function of distortions in the at least one pulse; (i) canceling the distortion in the at least one pulse by introducing a negative value of that calculated in step (h); and (j) introducing the negative value to cancel distortion using a non-programmable optic including at least one of;
(a) a deformable mirror, (b) a chirped mirror, and (c) a grating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A laser system comprising:
-
a laser beam pulse; a passive optic member operably introducing at least one reference phase in the pulse; a spectrometer operably detecting harmonic frequency intensities of the pulse; a controller operably determining a matrix of the detected harmonic frequency intensities versus the at least one reference phase; the controller operably determining a maximum intensity in the matrix for each frequency of the pulse; the controller operably assigning a value corresponding to each maximum intensity; the controller operably determining a second derivative of a spectral phase from the maximum intensity values for each frequency; and the controller operably calculating by double integration a spectral phase function of distortions in the pulse. - View Dependent Claims (18, 19)
-
-
20. A computer program, stored in memory, the program comprising:
-
(a) a first set of instructions operably introducing laser beam pulse-reference phases; (b) a second set of instructions operably determining a matrix of detected pulse-harmonic frequency intensities versus the pulse-reference phases; (c) a third set of instructions operably determining a maximum intensity in the matrix for each pulse-frequency; (d) a fourth set of instructions operably assigning a value corresponding to each maximum intensity; (e) a fifth set of instructions operably determining a second derivative of a spectral phase from the maximum intensity values for each frequency in a direct manner; (f) a sixth set of instructions operably calculating a double integral with respect to frequency in order to obtain a spectral phase function of pulse-distortions; (g) a seventh set of instructions operably displaying three-dimensional data including a derivative of the phases, wavelength and intensity; and (h) an eighth set of instructions operably causing physical movement of at least a portion of an optic to correct a pulse distortion. - View Dependent Claims (21, 22)
-
-
23. A method of using a laser system, the method comprising:
-
(a) emitting at least one laser beam pulse; (b) introducing at least one reference phase in the at least one pulse; (c) determining harmonic frequency intensities of the at least one pulse; (d) determining a matrix of the detected harmonic frequency intensities versus the at least one reference phase; (e) determining a maximum intensity value in the matrix for each frequency of the at least one pulse; (f) determining a second derivative of a spectral phase from the maximum intensity values for each frequency; (g) determining a double integral with respect to frequency in order to obtain a spectral phase function of distortions in the at least one pulse; (h) shaping the at least one pulse by a nonadaptive optic including at least one of;
(a) a mirror, and (b) a grating, and maintaining a desired pulse shaping condition of the optic without the need for electrical power; and(i) using computer software instructions to automatically characterize distortion in the at least one pulse after it has been shaped by the nonadaptive optic. - View Dependent Claims (24, 25, 26)
-
Specification